MESO: Mesoscale Discussion 1139

ACUS11 KWNS 121712
SWOMCD
SPC MCD 121712
LAZ000-TXZ000-121815-

MESOSCALE DISCUSSION 1139
NWS STORM PREDICTION CENTER NORMAN OK
1212 PM CDT TUE JUN 12 2012

AREAS AFFECTED...TX...LA

CONCERNING...SEVERE THUNDERSTORM WATCH 380...

VALID 121712Z - 121815Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 380
CONTINUES.

SUMMARY...THE THREAT FOR ISOLATED STRONG WINDS AND SOME HAIL WILL
PERSIST ACROSS VALID PORTIONS OF THE WATCH AREA.

DISCUSSION...LOOSELY ORGANIZED LINEAR CONVECTIVE SYSTEM CONTINUES TO
SPREAD SOUTH INTO SWRN LA AND EXTREME ERN TX EARLY THIS AFTERNOON.
STRONG INSTABILITY HAS DEVELOPED ALONG THE SWN FLANK OF THE SYSTEM
WHERE RECENT INCREASE IN CONVECTIVE VIGOR HAS BEEN NOTED OVER TYLER
COUNTY TX. ELSEWHERE...STORMS HAVE BECOME OUTFLOW DOMINANT ACROSS
SWRN LA WHERE WIND SHIFT HAS TRACKED SOUTH AT ABOUT 26KT AHEAD OF
THE DEEPER CONVECTION TO ITS NORTH. OVERALL...SEVERE THREATS IN THE
FORMS OF HAIL/WIND OF WILL PROBABLY REMAIN QUITE ISOLATED FOR THE
REMAINDER OF THE WATCH VALID TIME. LOCAL HEAVY RAIN IS CERTAINLY A
CONCERN GIVEN SLOW MOVEMENT AND TRAINING OF STORMS IN A VERY MOIST
ENVIRONMENT.

..CARBIN.. 06/12/2012

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

ATTN...WFO...LIX...LCH...SHV...HGX...

LAT...LON 31099472 30409166 29849117 29499165 29559388 29599449
29619471 31099472

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