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Mesoscale Discussion 1082
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   Mesoscale Discussion 1082
   NWS Storm Prediction Center Norman OK
   0718 AM CDT Sun Jun 18 2017

   Areas affected...Central and eastern OK

   Concerning...Severe Thunderstorm Watch 351...

   Valid 181218Z - 181415Z

   The severe weather threat for Severe Thunderstorm Watch 351
   continues.

   SUMMARY...Greatest severe-weather threat (hail and damaging winds)
   is expected to be mainly across the northern half of WW 351 through
   14Z (9 AM).  Local WFO areal expansion of WW 351 is possible across
   parts of northeast and east-central OK.

   DISCUSSION...At 1205Z, radar imagery indicated a band of storms
   extending from Craig and Mayes Counties to Okfuskee County moving to
   the east-southeast at 30-35 kt.  Steep midlevel lapse rates (7.5-8.5
   C/km per objective analyses extending from far western AR through
   central/southern OK) and effective bulk shear of 35-50 kt suggest
   any sustained storms will continue to have a threat for large hail.
   Otherwise, locally strong wind gusts will remain a threat, with
   uncertainty for damaging winds, given the lack of severe wind gusts
   in the last 2-3 hours.  Current radar trends and latest HRRR suggest
   storms will progress through northeast and east-central OK toward an
   area of undisturbed high theta-e air residing in western AR per
   objective analyses. Meanwhile, the presence of stronger
   surface-based inhibition with southward and southwestward extent in
   OK should continue to inhibit storm development in those directions.

   ..Peters.. 06/18/2017

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

   ATTN...WFO...SHV...TSA...OUN...

   LAT...LON   34229519 34299615 34949680 35939683 36339661 36519603
               36489531 36359486 36159465 35879451 35359463 34599490
               34229519 

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Page last modified: June 18, 2017
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