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   ACUS11 KWNS 250500   
   SWOMCD   
   SPC MCD 250500=20   
   OHZ000-KYZ000-INZ000-ILZ000-251100-   
      
   Mesoscale Discussion 0051   
   NWS Storm Prediction Center Norman OK   
   1100 PM CST Sat Jan 24 2026   
      
   Areas affected...Southern Illinois into southern Indiana and   
   southwest Ohio   
      
   Concerning...Heavy snow=20   
      
   Valid 250500Z - 251100Z   
      
   SUMMARY...Heavy snow band development is anticipated through the   
   next several hours across portions of the Ohio River Valley.   
   Snowfall rates exceeding 1 inch/hour appear probable later tonight.   
      
   DISCUSSION...A broad band of heavier precipitation is beginning to   
   emerge from northern AR into the lower OH Valley per regional radar   
   mosaics over the past 1-2 hours. This comes amid strengthening   
   frontogenesis through a deep layer (925-700 mb per recent   
   mesoanalyses) as the primary upper wave begins to migrate eastward   
   into the southern Plains. Latest forecast guidance shows   
   intensifying frontogenesis across the lower MS Valley into the OH   
   Valley through 09-12 UTC, which will support further   
   organization/intensification of a focused mesoscale precipitation   
   band. With mid-level temperatures below freezing north of the OH   
   River, snow should remain the predominant precipitation type.   
   Moderate snowfall rates will be common with a focused corridor of   
   higher rates (in excess of 1 inch/hour) likely. Per recent ensemble   
   guidance, this corridor will most likely emerge across southern IL   
   into southern IN and southwest OH.=20   
      
   These solutions also depict optimal banding potential during the   
   09-12 UTC period later tonight into early Sunday morning. However,   
   recent ASOS/AWOS observations from southern IL and southern IN have   
   shown an uptick in snowfall intensity (denoted by reduced   
   visibilities to 1/2 mile or less) over the past hour. These trends   
   suggest that the onset of heavier snowfall rates may commence   
   earlier than currently anticipated by most guidance as intermittent   
   moderate to heavy snow bands becomes more prominent with time.   
      
   ..Moore.. 01/25/2026   
      
   ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=   
   g!8ZGbFgTaa1vT5RUGQbtpejWwPRervkOtTy3qABGEYKtI15oAS_EXqpFV66w1MefdbPacGzY0Y=   
   kAmqpF2ug_mHNhP8u4$  for graphic product...   
      
   ATTN...WFO...RLX...ILN...LMK...IND...PAH...ILX...LSX...   
      
   LAT...LON   39118269 39008330 38248609 37788746 37478836 37358887   
               37458924 37648940 38458944 38728928 38968886 40158461   
               40308388 40298326 40208288 39988248 39738234 39498228   
               39248243 39118269=20   
      
      
   =3D =3D =3D   
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   --- SBBSecho 3.28-Linux   
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