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Plains tornado threat Mon 5/27-Fri 5/31


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MESOSCALE DISCUSSION 0882
   NWS STORM PREDICTION CENTER NORMAN OK
   0235 PM CDT THU MAY 30 2013

   AREAS AFFECTED...CNTRL/ERN OK...WRN AR...FAR SWRN MO

   CONCERNING...TORNADO WATCH 252...253...

   VALID 301935Z - 302030Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 252...253...CONTINUES.

   SUMMARY...GREATEST TORNADO THREAT EXISTS NEXT COUPLE OF HOURS WITH
   SEMI-DISCRETE SUPERCELLS ACROSS CNTRL INTO NERN OK AND SUPERCELLS
   EMBEDDED WITHIN A BROADER CLUSTER ACROSS FAR SERN OK/WRN AR. LARGE
   HAIL IS ALSO POSSIBLE WITH THE WRN SUPERCELLS.

   DISCUSSION...LOW-LEVEL WIND PROFILES ARE STRONGEST AND MOST
   FAVORABLE FOR TORNADOES IN ERN OK/WRN AR PER TULSA/FORT SMITH VWP
   DATA. HERE...0-1 KM SHEAR OF 30-35 KT HAS PERSISTED AND LARGELY IS
   AIDING IN THE DEVELOPMENT OF A FEW MODERATE TO STRONG MESOCYCLONES
   ACROSS FAR W-CNTRL AR. CONTINUED WAA ATOP SHALLOW CONVECTIVE OUTFLOW
   SHOULD FOSTER RENEWED UPDRAFTS WITH A PERSISTENT RISK FOR A FEW
   TORNADOES.

   FARTHER W...SUPERCELLS ACROSS CNTRL OK HAVE PROGRESSED OFF THE
   DRYLINE INTO A STRONGLY UNSTABLE AIR MASS PER 18Z OUN RAOB. ALTHOUGH
   LOW-LEVEL WIND PROFILES ARE NOT QUITE AS FAVORABLE AS FARTHER
   E...THEY ARE STILL SUFFICIENT FOR A RISK OF TORNADO
   DEVELOPMENT...WHERE ONE MIGHT BECOME STRONG GIVEN THE DEGREE OF
   BUOYANCY. HOWEVER...WITH LARGE-SCALE DRYING/WARMING OCCURRING
   /INFERRED BY WATER VAPOR IMAGERY/...SUPERCELLS HAVE SHOWN EVIDENCE
   OF STRUGGLING TO BECOME VERY INTENSE.

   ..GRAMS.. 05/30/2013

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Lunch sounds like a good idea... I'm gonna check back up in an hour. Storms thus far have been pretty unimpressive, still a lot of time for things to ramp up though. Seems like if ANY storms were to develop in Kansas in a few hours, when the moisture has somewhat returned along with the instability they COULD get something there, maybe. Doubt any storms will form though, no signs of convective development whatsoever up there.

Also wouldn't be entirely surprised to see a downgrade to a Slight Risk in the next update... SPC seemed pretty unimpressed with development so far.

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BULLETIN - EAS ACTIVATION REQUESTED  

TORNADO WARNING  

NATIONAL WEATHER SERVICE NORMAN OK  

257 PM CDT THU MAY 30 2013  

 

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A  

 

* TORNADO WARNING FOR...  

NORTHERN LINCOLN COUNTY IN CENTRAL OKLAHOMA...  

SOUTHEASTERN PAYNE COUNTY IN CENTRAL OKLAHOMA...  

 

* UNTIL 400 PM CDT  

 

* AT 255 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A  

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS  

STORM WAS LOCATED 4 MILES SOUTHWEST OF PERKINS...AND MOVING EAST  

AT 25 MPH. THIS STORM IS MOVING INTO AN ENVIRONMENT HIGHLY  

SUPPORTIVE OF TORNADO FORMATION.  

 

IN ADDITION TO A TORNADO...LARGE DAMAGING HAIL UP TO GOLF BALL SIZE  

IS EXPECTED WITH THIS STORM.  

 

* LOCATIONS IMPACTED INCLUDE...  

CUSHING...PERKINS...YALE...RIPLEY AND AGRA.

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