National Weather Service United States Department of Commerce


A dynamic, deepening upper level low moved from southern NM at lunchtime Wed to near Dalhart by midnight on December 26th. SSE low level flow brought mid 50s surface dewpoints to the southern TX Panhandle as a surface low deepened over the western TX Panhandle during the afternoon. It was a somewhat atypical set up with some strong convection along a Pacific front arcing across West Texas. Sunshine east of the convection tried to deepen the mixed layer. As the upper low deepened, backing mid level winds disrupted favorable shear profiles. As the afternoon rolled on, increasingly veer-back-veer soundings noted a hinderence to supercell formation. However, the backing aloft was strong enough that a left-moving supercell could not be ruled out.


Ultimately, hail up to quarter size and a brief EF-0 tornado occurred in the southern TX Panhandle on the afternoon of December 26th. The severe weather was short lived, as it was then followed up with a concern for snow potential for the northwestern Panhandles overnight. As the surface cyclone built northeast into Kansas, wrap around snow became the main focus. Guidance 925, 850, and 725 mb frontogenesis fields indicated a deep area of deformation present across our far northwestern CWA. Banding snowfall ended up causing upwards of 10 inches of snow in Guymon, OK overnight from December 26th into the morning of December 27th. Wind gusts above 30 mph made blowing snow conditions feel like a blizzard for those particularly in Cimarron, Dallam, and Hartley counties.

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