MESO: Mesoscale Discussion 0617

ACUS11 KWNS 290347
SWOMCD
SPC MCD 290347
OKZ000-TXZ000-290545-

MESOSCALE DISCUSSION 0617
NWS STORM PREDICTION CENTER NORMAN OK
1047 PM CDT SAT APR 28 2012

AREAS AFFECTED...CNTRL AND WRN OKS INTO NWRN TX

CONCERNING...SEVERE THUNDERSTORM WATCH 200...

VALID 290347Z - 290545Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 200
CONTINUES.

SCATTERED SUPERCELLS EXIST FROM NWRN TX INTO CNTRL OK. TWO CELLS
WERE N OF THE SURFACE BOUNDARY OVER CNTRL OK...BUT WERE MOVING
MOSTLY IN AN EWD DIRECTION. ALTHOUGH CELLS ARE FIGHTING SOME CAPPING
AND CIN...FAVORABLE WIND PROFILES ARE LIKELY TO KEEP THESE CELLS
GOING FOR A WHILE. AS THEY APPROACH THE SURFACE FRONT...THEY WILL
ENCOUNTER SLIGHTER WARMER AND MOISTER LOW LEVEL AIR MASS...WHICH
COULD HELP IN VERTICAL ACCELERATIONS DOWN LOW. THIS...ALONG WITH
MORE THAN ADEQUATE LOW LEVEL SHEAR...COULD RESULT IN A BRIEF
TORNADO.

TO THE S...LARGE HAIL WAS THE MAIN THREAT OVER NWRN TX WHERE LOW
LEVEL T/TD SPREADS WERE LARGER. SOME OF THESE CELLS WERE LEFT
MOVING...AND WILL EXIT THE WATCH INTO PORTIONS OF THE ERN TX
PANHANDLE...BUT AN ADDITIONAL WATCH IS NOT EXPECTED AT THIS TIME.

..JEWELL.. 04/29/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...TSA...FWD...OUN...SJT...LUB...MAF...

LAT...LON 36419683 32089966 32100140 36409863 36419683

35599794 35759755 35719703 35529686 35369697 34959722 34029826
34029875 34249912 34599904 35379845 35599794

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