Tuesday, June 28, 2011

MESO: Mesoscale Discussion 1434

ACUS11 KWNS 282009
SWOMCD
SPC MCD 282009
ARZ000-LAZ000-TXZ000-OKZ000-282145-

MESOSCALE DISCUSSION 1434
NWS STORM PREDICTION CENTER NORMAN OK
0309 PM CDT TUE JUN 28 2011

AREAS AFFECTED...RED RIVER VALLEY

CONCERNING...SEVERE THUNDERSTORM WATCH 571...

VALID 282009Z - 282145Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 571
CONTINUES.

THE SEVERE THREAT HAS SHIFTED TO MAINLY WRN AND SRN PORTIONS OF WW
571 WITH STABLE OUTFLOW OVER MUCH OF THE CNTRL AND ERN PARTS. A VERY
UNSTABLE AIR MASS REMAINS S OF THE OUTFLOW...FROM NRN LA INTO SERN
OK WHERE TEMPERATURES WERE RISING TO OVER 100 AND DEWPOINTS REMAINED
IN THE UPPER 60S TO LOWER 70S F.

LATEST VISIBLE IMAGERY SHOWS INCREASING CU FIELDS ALONG THE OUTFLOW
OVER SERN OK. CONTINUED HEATING AND MOISTURE CONVERGENCE SHOULD
ALLOW CAP TO BE BREACHED WITH ISOLATED TO SCATTERED STORMS CAPABLE
OF LARGE HAIL AND DAMAGING MICRO BURSTS.

THEREFORE...AREAS W OF WW 571 MAY NEED ANOTHER WATCH IN THE NEXT 1-2
HOURS.

..JEWELL.. 06/28/2011

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

ATTN...WFO...JAN...LZK...SHV...TSA...

LAT...LON 32459173 32959506 35579505 35099173 32459173

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