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Storm Prediction Center Mesoscale Discussion 174

Published Date and Time: 2026-03-07 19:03:00



Mesoscale Discussion 174
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   Mesoscale Discussion 0174
   NWS Storm Prediction Center Norman OK
   0601 PM CST Sat Mar 07 2026

   Areas affected...South Central Texas

   Concerning...Severe Thunderstorm Watch 27...

   Valid 080001Z - 080200Z

   The severe weather threat for Severe Thunderstorm Watch 27
   continues.

   SUMMARY...Scattered strong to locally severe convection will
   continue across south central Texas.

   DISCUSSION...Surface front continues advancing steadily south across
   south central TX early this evening. While surface temperatures have
   warmed considerably along the lower Rio Grande Valley, very little
   convection is noted across the warm sector. Latest radar data
   depicts scattered robust elevated convection north of the wind
   shift, and this activity is gradually developing south as the front
   advances toward deep south TX. Given the weak height rises noted
   across this region, frontal ascent should continue to be the primary
   mechanism for thunderstorm development. Forecast soundings suggest
   parcel lift may be near 1km, and adequate MUCAPE exists north of the
   wind shift for a continued hail risk with the most robust updrafts.

   ..Darrow.. 03/08/2026

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

   ATTN...WFO...HGX...CRP...EWX...

   LAT...LON   29600003 30269621 27939622 27290003 29600003 

   MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
   MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


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