High Knob Massif Webcam
Whiteout At 7:01 PM on March 25, 2014
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
A major upper air supported band of snow squalls essentially shut-down the Town of Wise
around 7:00 PM on March 25.
The High Knob Landform
Nearly ideal atmospheric conditions set the stage for the most intense snow squalls of this 2013-14 winter season, despite the fast approach of April.
The major lacking feature, which would have made this day even more intense, was a significant Great Lake connection to add more low-level moisture into this upslope-rising air machine!
High Knob Massif Webcam
Same View At 10:39 AM March 26, 2014
University Of Virginia's College At Wise
Although snow squalls lasted only 15 minutes in most places, travel became virtually impossible and visibility near zero amid the most intense afternoon-early evening activity.
Local exceptions included the biggest snow mountain in southwestern Virginia where more prolonged whiteouts caused snowfall to exceed 6", with 1-2 foot drifts, in parts of the High Knob Massif. By now it should be known that if you are a forecaster and you "disrespect" this mass of high terrain your forecast will be simply BUSTED ( * ).
*Consequences being much more serious if you disrespect it in person during winter conditions!
March 25, 2014 at 7:26 PM
( One of Many Whiteouts During March 25 )
Eagle Knob of High Knob Massif - WHITEOUT
Statistical Summary
March 25-26, 2014
Total Snowfall
( Average Depth )
( Lower Elevations of Russell Fork Basin )
Clintwood 1 W: 3.8"
( 1" to 2" )
( Northern Base of High Knob Massif )
City of Norton: 5.0"
( 2" to 3" )
( Upper Elevations above 3300 feet )
High Knob Massif: 8.0"
*( VDOT reported 6" )
*Snow drifts of 1-2 feet reported
by residents & the public
Snowfall totals during this spring event were significantly greater than depths in most locations, drifting and northern slopes of the High Knob Massif being an exception, as sticking alternated with melting by day. This can be illustrated by snowfall observations made at the NWS observation site of Clintwood 1 W.
The measurement of snowfall reported on this website is based upon The Snow Booklet method as developed by Colorado State University and adopted by the National Weather Service
The Snow Booklet - Colorado Climate Center
Clintwood 1 W Snowfall
March 25, 2014
0.7" of accumulation at 9:45 AM
( later melted )
0.4" of accumulation at 12:50 PM
( later melted )
1.1" of accumulation at 2:25 PM
( 1" on the ground that later melted off all but N slopes )
0.6" of accumulation at 5:00 PM
( Mean 1" ground depth )
0.8" of accumulation at 9:00 PM
( Mean 1-2" ground depths )
March 26, 2014
0.2" of accumulation at 3:00 AM
Total: 3.8"
The official National Weather Service snowboard
total for the March 25-26, 2014 storm event.
A chain reaction involving 15 vehicles, 10 making actual contact with each other, was reported on U.S. 23 in the Wise area during this event. Many other travel problems occurred across Wise & Dickenson counties due to rapid changes in visibility and snow that stuck to roads faster than it could melt or be cleared.
The nature of this event can be viewed below via frame extractions from the High Knob Massif Webcam at The University of Virginia's College At Wise. Doppler radar and NASA visible images are included for correlation with actual ground conditions.
Morning Conditions
High Knob Massif Webcam
March 25, 2014
The morning featured only a dusting to 1" of snow accumulation across Wise & Dickenson counties, with the most widespread activity being across northern portions of these counties.
Click consecutively on images for motion
( Using Keyboard Arrow Keys Is Faster )
March 25, 2014 at 9:51 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:53 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:54 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:55 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Morning snow mostly melted away except for some lingering along north slopes and crestlines at upper elevations in the
High Knob Massif and adjacent highest elevations.
March 25, 2014 at 9:56 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:57 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:58 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 9:59 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 10:00 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
NASA Visible Imagery
March 25, 2014
Note that all the NASA images for the day will be kept together,
in this section, to allow for "fluid" viewing of the event in the picture viewer.
Very cold air aloft for late March, or any time of year, allowed clouds to grow vertically into the heavens across a wide region along and west of
the Appalachians by early afternoon.
NASA Visible Image At 9:02 AM on March 25
NASA Visible Image At 9:15 AM on March 25
NASA Visible Image At 9:32 AM on March 25
NASA Visible Image At 10:15 AM on March 25
NASA Visible Image At 10:32 AM on March 25
NASA Visible Image At 11:15 AM on March 25
Note the dramatic increase in vertical
cloud growth from 10:32 AM to 12:45 PM
NASA Visible Image At 12:45 PM on March 25
Developing Convective Region Inside Yellow
NASA Visible Image At 12:45 PM on March 25
NASA Visible Image At 1:02 PM on March 25
NASA Visible Image At 1:15 PM on March 25
NASA Visible Image At 1:32 PM on March 25
NASA Visible Image At 1:45 PM on March 25
NASA Visible Image At 2:15 PM on March 25
NASA Visible Image At 2:32 PM on March 25
Counties Overlay For Reference
NASA Visible Image At 2:32 PM on March 25
NASA Visible Image At 2:45 PM on March 25
By the 2:45 to 4:02 PM period a major upper air supported band of snow squalls became organized and highly visible on NASA imagery across central-eastern Kentucky. There was no doubt, by this time, that the mountains were going to be blasted upon arrival of this feature given conditions already observed by 4:00 PM across Wise & Dickenson counties ( reference High Knob Massif Webcam ).
NASA Visible Image At 4:02 PM on March 25
Counties Overlay For Reference
NASA Visible Image At 4:02 PM on March 25
NASA Visible Image At 4:15 PM on March 25
NASA Visible Image At 4:32 PM on March 25
NASA Visible Image At 5:15 PM on March 25
NASA Visible Image At 5:32 PM on March 25
NASA Visible Image At 5:45 PM on March 25
NASA Visible Image At 6:02 PM on March 25
NASA Visible Image At 6:15 PM on March 25
NASA Visible Image At 6:32 PM on March 25
NASA Visible Image At 6:45 PM on March 25
Counties Overlay For Reference
NASA Visible Image At 6:45 PM on March 25
NASA Visible Image At 7:02 PM on March 25
NASA Visible Image At 7:15 PM on March 25
Counties Overlay For Reference
NASA Visible Image At 7:15 PM on March 25
Doppler Radar Imagery
March 25, 2014
Note that all the Doppler images for the day will also be kept together, in this section, to also allow for "fluid" viewing of the event in the picture viewer.
Doppler Radar showed the first squalls
and development of snow bands
Doppler Base Reflectivity At 11:49 AM March 25
Doppler Base Reflectivity At 11:58 AM March 25
Doppler Base Reflectivity At 12:08 PM March 25
Doppler Base Reflectivity At 12:18 PM March 25
Doppler Base Reflectivity At 12:28 PM March 25
Doppler Base Reflectivity At 12:37 PM March 25
Doppler Base Reflectivity At 12:47 PM March 25
Doppler Base Reflectivity At 12:47 PM March 25
Doppler Base Reflectivity At 12:57 PM March 25
Doppler Base Reflectivity At 1:06 PM March 25
Doppler Base Reflectivity At 1:16 PM March 25
Doppler Base Reflectivity At 1:26 PM March 25
Doppler Base Reflectivity At 1:38 PM March 25
Doppler Base Reflectivity At 1:48 PM March 25
Doppler Base Reflectivity At 1:57 PM March 25
Doppler Base Reflectivity At 2:06 PM March 25
Doppler Base Reflectivity At 2:10 PM March 25
Doppler Base Reflectivity At 2:14 PM March 25
Doppler Base Reflectivity At 2:19 PM March 25
Doppler Base Reflectivity At 2:23 PM March 25
Doppler Base Reflectivity At 2:27 PM March 25
Doppler Base Reflectivity At 2:32 PM March 25
Doppler Base Reflectivity At 2:36 PM March 25
Doppler Base Reflectivity At 2:40 PM March 25
Doppler Base Reflectivity At 2:44 PM March 25
Doppler Base Reflectivity At 2:49 PM March 25
Doppler Base Reflectivity At 2:53 PM March 25
Doppler Base Reflectivity At 2:57 PM March 25
Doppler Base Reflectivity At 3:02 PM March 25
Doppler Base Reflectivity At 3:06 PM March 25
Doppler Base Reflectivity At 3:10 PM March 25
Doppler Base Reflectivity At 3:15 PM March 25
Doppler Base Reflectivity At 3:19 PM March 25
Doppler Base Reflectivity At 3:23 PM March 25
Doppler Base Reflectivity At 3:28 PM March 25
Doppler Base Reflectivity At 3:32 PM March 25
Doppler Base Reflectivity At 3:38 PM March 25
Doppler Base Reflectivity At 3:43 PM March 25
Doppler Base Reflectivity At 3:47 PM March 25
Doppler Base Reflectivity At 3:51 PM March 25
Doppler Base Reflectivity At 3:56 PM March 25
Doppler Base Reflectivity At 4:00 PM March 25
Doppler Base Reflectivity At 4:04 PM March 25
Doppler Base Reflectivity At 4:09 PM March 25
Doppler Base Reflectivity At 4:13 PM March 25
Doppler Base Reflectivity At 4:17 PM March 25
Doppler Base Reflectivity At 4:22 PM March 25
Doppler Base Reflectivity At 4:26 PM March 25
Doppler Base Reflectivity At 4:30 PM March 25
Doppler Base Reflectivity At 4:34 PM March 25
Doppler Base Reflectivity At 4:39 PM March 25
Doppler Base Reflectivity At 4:43 PM March 25
Doppler Base Reflectivity At 4:47 PM March 25
Doppler Base Reflectivity At 4:52 PM March 25
Doppler Base Reflectivity At 4:56 PM March 25
Doppler Base Reflectivity At 5:00 PM March 25
Doppler Base Reflectivity At 5:05 PM March 25
Doppler Base Reflectivity At 5:09 PM March 25
Doppler Base Reflectivity At 5:13 PM March 25
Doppler Base Reflectivity At 5:18 PM March 25
Doppler Base Reflectivity At 5:22 PM March 25
Doppler Base Reflectivity At 5:26 PM March 25
Doppler Base Reflectivity At 5:31 PM March 25
Doppler Base Reflectivity At 5:35 PM March 25
Doppler Base Reflectivity At 5:41 PM March 25
Doppler Base Reflectivity At 5:46 PM March 25
Doppler Base Reflectivity At 5:50 PM March 25
Doppler Base Reflectivity At 5:50 PM March 25
Doppler Base Reflectivity At 5:54 PM March 25
Doppler Base Reflectivity At 5:59 PM March 25
Doppler Base Reflectivity At 6:03 PM March 25
Doppler Base Reflectivity At 6:07 PM March 25
Doppler Base Reflectivity At 6:11 PM March 25
Doppler Base Reflectivity At 6:16 PM March 25
Doppler Base Reflectivity At 6:20 PM March 25
Doppler Base Reflectivity At 6:20 PM March 25
Doppler Base Reflectivity At 6:24 PM March 25
Doppler Base Reflectivity At 6:29 PM March 25
Doppler Base Reflectivity At 6:33 PM March 25
Doppler Base Reflectivity At 6:37 PM March 25
Doppler Base Reflectivity At 6:42 PM March 25
Doppler Base Reflectivity At 6:46 PM March 25
Doppler Base Reflectivity At 6:50 PM March 25
Doppler Base Reflectivity At 6:55 PM March 25
Doppler Base Reflectivity At 6:59 PM March 25
Doppler Base Reflectivity At 6:59 PM March 25
Doppler Base Reflectivity At 7:03 PM March 25
Doppler Base Reflectivity At 7:08 PM March 25
Doppler Base Reflectivity At 7:12 PM March 25
Doppler Base Reflectivity At 7:16 PM March 25
Doppler Base Reflectivity At 7:20 PM March 25
Doppler Base Reflectivity At 7:25 PM March 25
Doppler Base Reflectivity At 7:29 PM March 25
Doppler Base Reflectivity At 7:33 PM March 25
Doppler Base Reflectivity At 7:38 PM March 25
Doppler Base Reflectivity At 7:44 PM March 25
Doppler Base Reflectivity At 7:48 PM March 25
Doppler Base Reflectivity At 7:53 PM March 25
Doppler Base Reflectivity At 7:53 PM March 25
Doppler Base Reflectivity At 7:57 PM March 25
Doppler Base Reflectivity At 8:01 PM March 25
Doppler Base Reflectivity At 8:06 PM March 25
Doppler Base Reflectivity At 8:10 PM March 25
Doppler Base Reflectivity At 8:14 PM March 25
Doppler Base Reflectivity At 8:19 PM March 25
Doppler Base Reflectivity At 8:28 PM March 25
Doppler Base Reflectivity At 8:38 PM March 25
Doppler Base Reflectivity At 8:48 PM March 25
Doppler Base Reflectivity At 8:57 PM March 25
Doppler Base Reflectivity At 9:07 PM March 25
Doppler Base Reflectivity At 9:17 PM March 25
Doppler Base Reflectivity At 9:26 PM March 25
Doppler Base Reflectivity At 9:36 PM March 25
Doppler Base Reflectivity At 9:48 PM March 25
Doppler Base Reflectivity At 9:57 PM March 25
Anatomy Of A Snow Squall Day
Along The Upslope Side of The High Knob MassifAfternoon Snow Squalls
High Knob Massif Webcam
March 25, 2014
The huge number of frame extractions which follow from the High Knob Massif Webcam are to illustrate the nature of a classic snow squall day along the upslope side of the mountains.
I have witnessed these days for 40+ years but never taken time or had the opportunity to present such a day in a manner like this with Doppler, NASA Visible, and Webcam views of ground conditions during the entire afternoon of action.
Despite the classic formation and reformation of many squalls, conditions during this day lacked a Great Lake connection which would have added much more low-level moisture and resulted in greater snowfall amounts than observed ( * ).
( Example From Winter 2011-12 )
Snow Squalls & Streaks With Great Lake Connection
*The greatest snow squall & snowstreak episodes occur during NW Upslope Flow snow events with a Great Lake connection into the High Knob Massif area. Most Great Lake moisture during March 25, 2014 passed northeast of the Cumberland Block, with action this day driven by upslope and steep lapse rates.
( Looking South )
March 25, 2014 at 12:46 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
The High Knob Massif became obscured in snow and clouds by 12:00 PM, with the band seen on Doppler and NASA imagery developing across
the massif south of Wise.
March 25, 2014 at 12:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
The first significant snow squall band pushed into the City of Norton and Town of Wise between
12:47 PM and 1:00 PM.
March 25, 2014 at 12:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 12:59 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 12:59 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:00 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:00 PM
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March 25, 2014 at 1:01 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:01 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:02 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:02 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:03 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:03 PM
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March 25, 2014 at 1:04 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:04 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:05 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:05 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:06 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:06 PM
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March 25, 2014 at 1:07 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:07 PM
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March 25, 2014 at 1:08 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:08 PM
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March 25, 2014 at 1:09 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:09 PM
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March 25, 2014 at 1:10 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:10 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:11 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:12 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
The above was merely the opening volley of what would prove to be a very intense afternoon along the upslope side of the mountains.
March 25, 2014 at 1:21 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:26 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:26 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:27 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:27 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:29 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:29 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:30 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:30 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:31 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Although this 1:21 to 1:50 PM interval may seem unimportant, note how low-level clouds are very puffy looking and how the High Knob Massif slowly emerges as cloud bases lift briefly off the lofty crestlines in later frames.
On a snow squall day these intermediate intervals are critical to formation of new activity, as insolation heats the ground which transfers it back into the overlying atmosphere where the "warmed" air begins rising and accelerating upward in the vertical amid cold air.
If the air aloft is very cold, like it was on this day, the vertical lapse rate or temperature drop with increasing height can be large. The lapse rate is said to be steep and the temperature drop with height rapid. This makes the atmosphere unstable.
These breaks are driven by the snow squalls themselves.
Convergence of air into a snow squall causes air to rise vertically. All this vertical motion must be compensated for and results in subsidence around the snow squall.
In other words, air is forced to sink around a vigorous squall which tends to dissipate adjacent clouds, allowing for intervals of enhanced incoming solar radiation that adds energy back into the atmosphere to replace energy used by the squall which just passed, setting the stage for the next squall, in a rather interesting cyclic process.
In this way the field of snow squalls literally feed themseleves energy at the same time they are converting it into motion & precipitation production.
Over mountainous terrain the above becomes more complex, the lifting much more vigorous, as air runs up against elevated terrain and a large mountain like the High Knob Massif. Air which is already primed for rising is given an upward boost to result in vigorous vertical motion despite what on paper may be only minor CAPE
( convective available potential energy ).
Forecast models tend to under-estimate snowfall on such days as the lifting is much more vigorous in reality than their physics can resolve over terrain which they tend to poorly model ( especially in this area ).
March 25, 2014 at 1:32 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:32 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:33 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:33 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:34 PM
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University Of Virginia's College At Wise
March 25, 2014 at 1:35 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:36 PM
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March 25, 2014 at 1:37 PM
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University Of Virginia's College At Wise
March 25, 2014 at 1:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Observe the vertical extent of clouds, as they grow upward amid cold air aloft into the heavens.
March 25, 2014 at 1:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:41 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:41 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:42 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:47 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:48 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Observe how nearly all snow accumulation from the earlier squall melted away in Wise, with solid snow only visible across northern slopes of the High Knob Massif. This is how snowfall became much greater than snow depth in most places, as already noted in the statistical summary of this event.
Snow even melted some at the summit level of the
High Knob Massif, in between squalls, despite sub-freezing temperatures and a lack of any prolonged sunshine, illustrating the strong nature of March insolation through the clouds.
March 25, 2014 at 1:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Just as the entire crest of the High Knob Massif finally becomes visible, note how the next snow squall begins moving in from the left side
( W-NW ) of this view.
March 25, 2014 at 1:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:50 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:51 PM
Looking Toward The High Knob Massif
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March 25, 2014 at 1:52 PM
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March 25, 2014 at 1:53 PM
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March 25, 2014 at 1:54 PM
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March 25, 2014 at 1:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Wise experienced the weaker side of this squall which hit the City of Norton and High Knob Massif harder ( reference Doppler radar frames between 1:48 PM and 2:23 PM or 1748z to 1823z ).
March 25, 2014 at 1:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Despite mostly missing Wise the squall packed strong winds, observe how trees sway back and forth with frame motion in the picture viewer.
March 25, 2014 at 1:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 1:59 PM
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March 25, 2014 at 2:00 PM
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March 25, 2014 at 2:01 PM
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March 25, 2014 at 2:04 PM
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March 25, 2014 at 2:06 PM
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March 25, 2014 at 2:09 PM
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March 25, 2014 at 2:14 PM
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March 25, 2014 at 2:20 PM
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March 25, 2014 at 2:21 PM
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March 25, 2014 at 2:23 PM
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March 25, 2014 at 2:26 PM
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March 25, 2014 at 2:30 PM
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March 25, 2014 at 2:34 PM
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March 25, 2014 at 2:35 PM
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March 25, 2014 at 2:37 PM
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March 25, 2014 at 2:38 PM
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March 25, 2014 at 2:38 PM
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March 25, 2014 at 2:39 PM
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March 25, 2014 at 2:39 PM
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March 25, 2014 at 2:40 PM
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March 25, 2014 at 2:40 PM
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March 25, 2014 at 2:41 PM
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March 25, 2014 at 2:41 PM
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March 25, 2014 at 2:42 PM
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March 25, 2014 at 2:42 PM
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March 25, 2014 at 2:43 PM
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March 25, 2014 at 2:43 PM
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March 25, 2014 at 2:44 PM
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March 25, 2014 at 2:44 PM
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March 25, 2014 at 2:45 PM
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March 25, 2014 at 2:45 PM
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March 25, 2014 at 2:46 PM
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March 25, 2014 at 2:46 PM
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March 25, 2014 at 2:47 PM
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March 25, 2014 at 2:47 PM
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March 25, 2014 at 2:48 PM
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March 25, 2014 at 2:48 PM
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University Of Virginia's College At Wise
March 25, 2014 at 2:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:53 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:53 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:54 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:54 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 2:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:01 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:01 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:04 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:04 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:05 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:07 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:10 PM
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University Of Virginia's College At Wise
March 25, 2014 at 3:12 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:22 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:29 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:30 PM
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University Of Virginia's College At Wise
March 25, 2014 at 3:32 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:41 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:42 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:45 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:47 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
An intense, wind driven whiteout passed across the southwestern side of Norton and across part of the High Knob Massif crest zone during the period from 3:56-4:22 PM ( reference Doppler images ), brushing Wise and producing black distant skies.
March 25, 2014 at 3:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 3:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:01 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:18 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Observe again the vertical growth of clouds which
were critical to this intense, convective action.
March 25, 2014 at 4:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Once again the most intense action was just southwest of Wise as a snowstreak and repeat squalls moved across the High Knob Massif, between Duffield & Norton, during the
4:47 PM to 5:30 PM period.
March 25, 2014 at 4:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 4:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:06 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 5:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:01 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:04 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:07 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:08 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:09 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:10 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:18 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:22 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Like on a summer thunderstorm day, the brightening of skies through 6:30 PM was a
very bad signal of things to come.
VERY BAD SIGNAL!
March 25, 2014 at 6:26 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:33 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:34 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:35 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:35 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:36 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:37 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:47 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:52 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:53 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:53 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:54 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:54 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 6:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:04 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:04 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:05 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:05 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:06 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:06 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:07 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:07 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:08 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:09 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Following a lull it was right back into another
intense, wind driven whiteout by around 7:30 PM.
March 25, 2014 at 7:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:21 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:37 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
March 25, 2014 at 7:41 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:43 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:44 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:46 PM
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University Of Virginia's College At Wise
March 25, 2014 at 7:48 PM
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University Of Virginia's College At Wise
March 25, 2014 at 8:00 PM
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University Of Virginia's College At Wise
Although activity began to wane after sunset,
with loss of insolation and decreasing instability, additional upslope squalls occurred in hit-miss fashion during the evening.
March 25, 2014 at 8:27 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:02 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:04 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:05 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:06 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:10 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:13 PM
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University Of Virginia's College At Wise
March 25, 2014 at 9:16 PM
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University Of Virginia's College At Wise
It is little wonder that a chain reaction accident occurred along U.S. Route 23, with many other mishaps and problems across Wise & Dickenson counties during the afternoon-evening.
However, I had forecasted this setting to those on my climate newsletter listing well in advance.
March 25, 2014 at 12:15 AM
Climate Newsletter - Wayne Browning
19 Hours Prior To Most
Intense Evening Snow Bands
Right now I can see the following
scenario playing out Tuesday...........
Light snow develops between 4:00 to 8:00 AM Tuesday and may be enough to force some morning school schedule changes. SAY WHAT!
A break may follow by mid-morning to
mid-day and if the sun does not come out
( which it may in many places amid some cloud breaks ) it will still be able to penetrate clouds enough to cause melting of any morning sticking ( at least below 3000 feet and across southern exposures at nearly all elevations ).
At the same time, very cold –30 to –40 degree below zero air aloft will be approaching and the atmosphere will become increasingly unstable. Clouds
will begin to look puffy or even billow upward into the heavens.
So either hit-miss snow squalls ( bursts
of intense snow ) will develop and/or a band of heavy snow will form by around 4:00 to 7:00 PM ( this timing being associated with a notable upper air disturbance and change in Theta-E values aloft...as well as surface front / that is,
I just don’t make up these times
for no good reason! ).
This is looking like a setting where
either convective squalls or a convective snowband could develop ( with embedded thunder & lightning in the most intense activity and otherwise just a downpour of snow in other places where it hits ). This should at least push into our western upslope zone ( that is make it across Wise & Dickenson counties and possibility portions of Lee, Scott, and Russell counties ).
It became obvious during the day that an intense snowband would be likely by around 7:00 PM, such that I released the following at 5:43 PM
March 25, 2014 at 5:43 PM
Climate Newsletter - Wayne Browning
Major Whiteout Snow
Band Approaching
Wanted to alert everyone that we have a major band of whiteout snow approaching the mountains and Virginia-Kentucky border.
Of course, as many know, the atmosphere became so unstable today that we’ve had one intense squall after another in many places ( especially across Wise, Dickenson, northern Lee, northern Scott counties with one whiteout after another today across the High Knob Massif ).
I’ve measured 3” of snow in Clintwood but currently have less than 1” on the ground. As I noted yesterday, there has been much more snow fall ( with sticking, melting, sticking, etc....) than all places
have on the ground.
The major squall I’m concerned about is the solid line west of the border at 5:35 PM, just crossing extreme western Lee County.
This is moving E-SE and is the line that
I expected to have upper air support...it will likely become more intense over the mountains...with whiteout conditions and hazardous travel rapidly developing ( big cloud towers have been visible locally
over the area already ).
Due to the colder temps and setting sun
this one will likely not melt away.
March 26, 2014 at 10:36 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
March 26, 2014 at 10:39 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy of Computer Science-Mathematics Department
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