Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 252209
SWOMCD
SPC MCD 252209
OKZ000-252315-

MESOSCALE DISCUSSION 0142
NWS STORM PREDICTION CENTER NORMAN OK
0509 PM CDT WED MAR 25 2015

AREAS AFFECTED...WCNTRL OK

CONCERNING...SEVERE THUNDERSTORM WATCH 6...

VALID 252209Z - 252315Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 6 CONTINUES.

SUMMARY...THUNDERSTORMS ARE EXPECTED TO INTENSIFY OVER WCNTRL OK.
RATHER THAN ISSUE A NEW WW...ADDITIONAL COUNTIES HAVE BEEN ADDED TO
EXISTING WW. LARGE HAIL AND DAMAGING WIND GUSTS SHOULD REMAIN THE
PRIMARY THREATS.

DISCUSSION...COLD FRONT EXTENDS FROM NRN PORTIONS OF WRN TX INTO
SWRN AND WCNTRL OK THEN NEWD AS A STATIONARY FRONT THROUGH THE
REMAINDER OF OK INTO SRN MO. TRENDS IN SATELLITE DATA INDICATE RAPID
CUMULUS DEVELOPMENT ALONG THE COLD FRONT OVER WCNTRL OK.
THUNDERSTORMS HAVE DEVELOPED AS DEEPER ASCENT ACCOMPANYING A
PROGRESSIVE SHORTWAVE TROUGH PHASES WITH LOW-LEVEL FRONTAL
CONVERGENCE. THE ATMOSPHERE IN THIS REGION IS STRONGLY UNSTABLE WITH
2500-3000 J/KG MLCAPE. INITIAL STORMS MAY BE DISCRETE...BUT SOME OF
ACTIVITY MIGHT EVENTUALLY EVOLVE INTO LINE SEGMENTS. LATEST VWP DATA
INDICATE STRONG /45-50 KT/ 0-6 KM SHEAR SUPPORTIVE OF
SUPERCELLS...ALONG WITH 150-200 M2/S2 0-1 KM STORM RELATIVE
HELICITY. WHILE A BRIEF TORNADO CANNOT BE RULED OUT...OVERALL
TORNADO THREAT SHOULD REMAIN LIMITED BY TENDENCY FOR STORMS TO BE
UNDERCUT BY THE FRONT AND LESS THAN OPTIMAL BOUNDARY-LAYER
TEMPERATURE-DEWPOINT SPREADS.

..DIAL/EDWARDS.. 03/25/2015

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

ATTN...WFO...OUN...

LAT...LON   35699812 35299789 34719810 34529843 34539883 34879911
            35309904 35699812



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