Recap of February 26-28, 2007 Upslope Snow Event

Cold northwest flow behind a departing storm system brought a widespread snowfall to eastern Kentucky from late Tuesday February 26th into the early morning hours of Thursday February 28th.  For most areas, this ended up being the heaviest snowfall so far in the winter season.  In general, most lower elevation locations received between 1 and 3 inches of snow for the event.  However, the snowfall was very elevation dependant and the higher terrain of southeast Kentucky fared much better as the upslope winds interacting with the terrain helped to maximize snowfall amounts.  It is estimated based on several reports received that elevations above 2500 ft along the Virginia border received over 6 inches of snow with up to 11 inches reported by observers on Black Mountain at 4077 feet elevation.

 Surface charts for the event are included below (click on the images for a larger view).

7 pm EST Tuesday February 26, 2007

7 pm Tuesday February 26, 2007

7 am EST Wednesday February 27, 2007

7 am Wednesday February 27, 2007

7 pm Wednesday February 27, 2007
7 pm Wednesday February 27, 2007

 

The chart below (click on the image for a larger view) is the initialization for the 12Z February 27th run of the GFS.  Overlayed on the map are 1000-850 mb wind streamlines, 1000-850 mb relative humidity and 850 mb temperatures.  The fetch off Lake Michigan, perpendicular flow to our southwest to northeast oriented ridges and the unstable low level airmass produced the nearly ideal upslope flow snow event.

27/12Z GFS Initialization

Below is graphic detailing estimated storm total snowfall amounts for the event based on reports received from the NWS in Jackson, KY and a few images from of some of the heavier snow from the higher elevations of eastern Pike County.  Thanks goes out to all of our cooperative weather observers, CoCoRaHS observers, highway departments and storm spotters for the timely reports throughout the event!

Storm Total Snowfall from late Tuesday February 26 through Thursday morning February 28, 2007

Storm Total Snowfall - February 26-28, 2007

 

Photos courtesy of Doug Tackett, Pike County EM (click on the images for a larger view)



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