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Storm Prediction Center Mesoscale Discussion 47

Published Date and Time: 2025-01-21 08:30:00












Mesoscale Discussion 47
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   Mesoscale Discussion 0047
   NWS Storm Prediction Center Norman OK
   0447 AM CST Tue Jan 21 2025

   Areas affected...Far southeast Texas into south-central Louisiana

   Concerning...Heavy snow 

   Valid 211047Z - 211515Z

   SUMMARY...Moderate snowfall with embedded heavier bands will become
   more likely over the next several hours in southern Louisiana.

   DISCUSSION...The broad upper-level trough across the central/eastern
   U.S. is in the process of intensifying this morning. As this occurs,
   the upper-level jet along eastern flank of the trough will also
   intensify. Increasing mid/upper-level ascent as well as at least
   weak lower-level frontogenesis (850-700 mb or so) will promote
   favorable conditions for dendritic growth. Moderate snowfall has
   already been observed at several stations in southwestern Louisiana
   over the last hour. With the most favorable synoptic conditions
   expected to occur around mid/late morning, moderate snowfall should
   become increasingly prevalent across southern Louisiana in
   particular. Some banded structures will be possible which could
   produce heavier snowfall rates (0.5-1 in/hr) at least locally.

   ..Wendt.. 01/21/2025

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

   ATTN...WFO...LIX...LCH...

   LAT...LON   29749396 29999432 30579416 30979267 31019185 30809148
               30689122 29949132 29709181 29669242 29709266 29749396 


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