WATCHES: Severe Thunderstorm Watch Number 572

WWUS20 KWNS 282055
SEL2
SPC WW 282055
OKZ000-TXZ000-290400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 572
NWS STORM PREDICTION CENTER NORMAN OK
355 PM CDT TUE JUN 28 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

SOUTHEAST AND SOUTH-CENTRAL OKLAHOMA
NORTHEAST AND NORTH-CENTRAL TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL
1100 PM CDT.

HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHEAST
OF PARIS TEXAS TO 15 MILES SOUTH SOUTHWEST OF ARDMORE OKLAHOMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 570...WW 571...

DISCUSSION...A SMALL CORRIDOR FOR CONCENTRATED SEVERE WEATHER
POTENTIAL APPEARS TO BE DEVELOPING FROM VICINITY OF N-S ORIENTED
OUTFLOW BOUNDARY OVER FAR SERN OK WWD ALONG W-E ORIENTED SYNOPTIC
FRONT WHICH HAS STALLED JUST N OF THE RED RIVER. MODIFICATION OF
OBSERVED SOUNDINGS AND LATEST MODEL GUIDANCE SUGGEST THAT AIR MASS
IS NEARLY UNCAPPED WITH MLCAPE UPWARDS OF 3000-4000 J/KG. VERTICAL
SHEAR IS NOT PARTICULARLY STRONG...BUT THE PRESENCE OF THE STRONG
INSTABILITY AND STEEP LAPSE RATES INDICATE A RISK FOR DAMAGING WINDS
AND HAIL WITH ANY STORMS THAT DEVELOP.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 35010.

...MEAD

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.