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Mesoscale Discussion 1658
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   Mesoscale Discussion 1658
   NWS Storm Prediction Center Norman OK
   0722 PM CDT Fri Aug 05 2022

   Areas affected...Northern Plains

   Concerning...Severe Thunderstorm Watch 517...

   Valid 060022Z - 060145Z

   The severe weather threat for Severe Thunderstorm Watch 517
   continues.

   SUMMARY...Severe threat continues across the entire watch region.

   DISCUSSION...Convection that developed due to strong surface heating
   has gradually expanded in areal coverage along/near surface boundary
   draped across ww517. This activity is rooted within the boundary
   layer along an instability axis that continues to favor new updrafts
   forming along the wind shift. Over the last half hour or so,
   scattered convection has gradually increased northeast of FAR where
   low-level warm advection is a bit stronger along the northeastern
   plume of steepest low-level lapse rates. In the absence of strong
   large-scale support aloft, it appears convection will struggle to
   move appreciably east of the primary instability reservoir. However,
   with time, a gradually expanding elongated zone of strong/severe
   thunderstorms should advance across ww517.

   ..Darrow.. 08/06/2022

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

   ATTN...WFO...DLH...FGF...FSD...ABR...BIS...UNR...

   LAT...LON   43200226 47119717 47099458 43229988 43200226 

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Page last modified: August 06, 2022
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