Mesoscale Discussion 0112
   NWS Storm Prediction Center Norman OK
   0625 PM CST Wed Feb 02 2022

   Areas affected...much of central Oklahoma

   Concerning...Winter mixed precipitation 

   Valid 030025Z - 030430Z

   SUMMARY...A mix of freezing rain, sleet, and moderate snow is
   expected to continue across central Oklahoma into the evening hours.
   A gradual change over to snow is expected to happen across central
   into eastern Oklahoma as low to mid-level temperatures continue to
   cool from west to east.

   DISCUSSION...An embedded mid-level impulse is pivoting around the
   broader upper trough and is ejecting into the southern Plains,
   contributing to an uptick in more widespread moderate to heavy
   wintry precipitation. Instances of freezing rain and sleet have been
   reported across northern TX into eastern OK, with northern OK
   experiencing brief occasions of moderate snow. The 21Z and 00Z OUN
   observed soundings showed 0-1C temperatures just above 850 mb
   (1500-1700 meters above ground level), with KTLX/KFDR
   dual-polarimetric radar data depicting a band of higher ZDR/lower
   correlation-coefficient values from Cotton/Jefferson to Creek
   Counties in OK, indicating the location of the wintry precipitation
   transition zone. However, some of the last few radar scans show an
   eastward propagation of the transition zone.

   While wintry mixed precipitation is expected to persist, a gradual
   transition to mostly snow is possible from western to eastern OK as
   the 850 mb temperatures continue to slowly cool. However, despite
   the near-saturated troposphere, temperatures above 850 mb hovering
   near the freezing mark may reduce efficiency in dendrite production,
   with snow rates expected to be moderate, perhaps reaching 1
   inch/hour rates on a brief basis. Wintry mixed precipitation should
   persist the longest across eastern OK.

   ..Squitieri.. 02/03/2022

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

   ATTN...WFO...TSA...FWD...OUN...

   LAT...LON   34229653 33969721 33879789 33949866 34479945 35389894
               36239741 36799617 36799540 36449478 36069454 35519474
               34689589 34229653