Friday, January 9, 2015

Arctic Day Amid The Southern Appalachians


January 7, 2015 at 5:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise 
Courtesy Of Computer Science-Mathematics Department




The coldest air mass since January 2014 poured into the mountains a year later with plunging temperatures and upslope snow showers and snowstreaks to produce an Arctic Day amid the southern Appalachians of the USA.


All High Knob Massif Webcam images are original frames 
of live conditions.  None have been altered in any way.


High Knob Massif Webcam

   Click consecutively on frames for motion in picture viewer
    ( Use Keyboard Arrows For Faster Time Lapse Motion )

I have extracted some sample frames from the High Knob Massif live webcam to illustrate varied and majestic conditions on what was a dangerously cold afternoon-night in the mountains.


January 7, 2015 at 2:17 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise 
Courtesy Of Computer Science-Mathematics Department

The day started cold with fine snow that lightly dusted parts of the area before sunrise, with heavier snow passing just to the northeast into southern West Virginia. 

A snow burst along an Arctic Front following to deposit 0.5" to 1" amounts before noon along and northwest of the High Knob Massif and Tennessee Valley Divide.

*This made road conditions slick almost immediately due to temperatures in the 10s ( single digits in upper elevations above 3000 feet ).

January 7, 2015 at 2:19 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

The afternoon-evening was ruled by snow showers and local snowstreaks that were most productive along the windward slopes of the High Knob Massif - Black Mountain corridor, including the Town of Wise.  Snow amounts were light for this type of NW air flow setting, with 1-2" common ( a dusting to 3" being the range ), but made conditions slick and this arctic day look the part!

*Amounts were heaviest amid snowstreaks, which I will highlight with NASA visible images at the end of this section.  Right now, sit back and enjoy the varied conditions of this bitter afternoon.

January 7, 2015 at 2:19 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:20 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:21 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:23 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:29 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:31 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:35 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:42 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:48 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 2:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

Some snow did "disappear" during this day.  I say disappear since with temps so far below freezing it did not melt.  It sublimated or skipped the melting phase and went directly from solid to vapor.

It simply vanished before your eyes!

*This snow was very low density, with low water content, which made it easier to sublimate and go from solid to vapor.

January 7, 2015 at 3:05 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:05 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

The High Knob Massif did not emerge from snow clouds very often, with only brief intervals where it was visible along the horizon.

January 7, 2015 at 3:12 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:23 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:27 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:45 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:45 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:46 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 3:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:08 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:09 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:09 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:10 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:11 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:11 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:12 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:15 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:16 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:17 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:18 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:19 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:22 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:45 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:46 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:47 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:49 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:50 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:53 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:54 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:55 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 4:58 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:02 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:03 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:06 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

Note streaks of snow in the sky which 
are visible amid these cloud breaks.

January 7, 2015 at 5:14 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:15 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:16 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:24 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:26 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:27 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

Note the snow shower that is moving across upper elevations of the High Knob Massif ( below frames ), between Pickem Mountain and the main crestlines, as yet another wave engulfs the massif.

January 7, 2015 at 5:36 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:37 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:38 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:39 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:40 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:45 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:51 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:56 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:57 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 5:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

The evening and overnight featured additional snow showers as temperatures dropped below 
zero across middle elevations. 

*Upper elevations dropped below zero during the afternoon.

January 7, 2015 at 7:13 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 8:00 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 11:29 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

Snow recovered roadways, not 
already covered, during the evening.

January 7, 2015 at 11:43 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 11:46 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 7, 2015 at 11:59 PM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 8, 2015 at 12:05 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 8, 2015 at 12:09 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 8, 2015 at 12:09 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

January 8, 2015 at 2:55 AM
Looking Toward The High Knob Massif
University Of Virginia's College At Wise
Courtesy Of Computer Science-Mathematics Department

Snow sparkles amid bitter air and Darlene Fields caught both that and some sunlight the next morning as low clouds finally cleared.

January 8, 2015
High Chaparral of High Knob Massif
Diamonds In The Snow On Below Zero Morning
Photograph by Darlene Fields - © All Rights Reserved.

Morning hours of January 8 featured just enough clearing to allow nice NASA high-resolution visible satellite images to be captured. 

These illustrate both snowstreaks-upslope snow along the Appalachians and cold air stratocumulus forming over top relatively mild waters of the Atlantic Ocean.

January 8, 2015
NASA High-Resolution Visible Image

January 8, 2015
NASA High-Resolution Visible Image

With very cold air aloft & instability ( as noted by PUFFY clouds seen during breaks in my picture viewer set of frames ) a few snowstreaks did make it across the mountains, but generally in weakened fashion.  For the most part the low density snow created good moisture extraction along windward slopes, with little making it to the lee side of the main mountain barriers.

*Mark & Anna Hess reported snow was not even enough 
to measure on their farm amid the Clinch River Valley of northern Scott County, on the lee side of the High Knob Massif.  A trace of snow officially fell in the Tri-Cities.


Temperatures In The City of Norton

January 7, 2015
City of Norton Automated Weather Station

*A total of 21 consecutive hours in the City of Norton with single digit
temperatures ( above & below zero ) during this arctic invasion.

Wind chill factors of -10 to -20 below zero were common through the evening of January 7 into the overnight of January 8 in Wise ( -20 below zero in gusts ), with -30+ below zero chill factors amid upper elevations in the High Knob Massif.

January 8, 2015
City of Norton Automated Weather Station

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