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Mesoscale Discussion 890
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   MESOSCALE DISCUSSION 0890
   NWS STORM PREDICTION CENTER NORMAN OK
   0622 PM CDT THU JUN 04 2015

   AREAS AFFECTED...PORTIONS OF SERN WY...NEB PANHANDLE...NERN CO

   CONCERNING...TORNADO WATCH 255...

   VALID 042322Z - 050115Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 255 CONTINUES.

   SUMMARY...THE SVR-TSTM RISK CONTINUES ACROSS WW 255.

   DISCUSSION...ISOLATED TO WIDELY SCATTERED TSTMS CONTINUE ACROSS WW
   255 IN A MOIST/UPSLOPE-FLOW REGIME. THE PRESENCE OF SFC DEWPOINTS IN
   THE UPPER 40S TO THE 50S/AROUND 60F E OF A N/S BOUNDARY NEAR/E OF
   THE FRONT RANGE...COUPLED WITH STEEP MID-LEVEL LAPSE RATES...IS
   SUPPORTING MODERATE TO LOCALLY STRONG INSTABILITY. THIS WILL YIELD A
   CONTINUED RISK FOR INTENSE STORMS INCLUDING SUPERCELLS GIVEN 30-40
   KT OF DEEP SHEAR AND A VERTICALLY VEERING WIND PROFILE. SVR
   HAIL/WIND WILL REMAIN POSSIBLE...WITH BACKED /ALBEIT MODEST/ SFC
   WINDS YIELDING SOME TORNADO POTENTIAL.

   ..COHEN.. 06/04/2015


   ATTN...WFO...UNR...PUB...BOU...CYS...

   LAT...LON   39080509 43010545 43000347 39090323 39080509 

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