Mesoscale Discussion 1765
   NWS Storm Prediction Center Norman OK
   0854 AM CDT Wed Oct 28 2020

   Areas affected...Northwestern Oklahoma and the far eastern Texas
   Panhandle

   Concerning...Freezing rain 

   Valid 281354Z - 281800Z

   SUMMARY...Freezing rain will likely continue for portions of western
   and northwestern Oklahoma and the far eastern Texas Panhandle
   through the morning hours.

   DISCUSSION...Morning surface observations show that the surface
   freezing line continues to gradually shift west across western OK
   and northwest TX. 12 UTC soundings from the region show a warm nose
   remains in place across western OK and much of the eastern TX
   Panhandle with diminishing prominence with westward extent. This
   thermodynamic profile will continue to support freezing rain across
   the region as precipitation continues to develop and advect
   northward along an 850 mb warm frontal zone. The coverage of
   freezing rain should gradually diminish as low-level temperatures
   warm through the day from east to west, though at least a few hours
   of freezing rain will remain likely this morning for west/northwest
   OK and the far eastern TX Panhandle. 

   To the west, lift associated with the left-exit region of a nearly
   meridional upper-level jet over west TX and sub-freezing
   thermodynamic profiles will continue to support snowfall across
   northeast NM and the northwest TX Panhandle. RAP analyses and
   forecasts suggest that instability rooted near 700 mb in the region
   (noted in the 12 UTC AMA sounding) should remain in place through
   the day and will contribute to localized areas of moderate snowfall.
   This idea is supported by recent visibility reductions down to
   around 1 mile in a few locations across northeast NM and the
   northwest TX Panhandle. This activity should continue through at
   least the morning hours as broad ascent persists over the region.

   ..Moore.. 10/28/2020

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...OUN...DDC...AMA...

   LAT...LON   34579993 35610033 36200049 37020029 37219925 36899856
               36449835 36079839 35549878 34899928 34519959 34579993