WATCHES: Severe Thunderstorm Watch Number 636

WWUS20 KWNS 282312
SEL6
SPC WW 282312
ARZ000-TXZ000-290600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 636
NWS STORM PREDICTION CENTER NORMAN OK
610 PM CDT SAT JUN 28 2008

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

SOUTHERN ARKANSAS
NORTHERN AND CENTRAL TEXAS

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 610 PM
UNTIL 100 AM CDT.

HAIL TO 1.5 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 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST
SOUTHWEST OF ABILENE TEXAS TO 40 MILES NORTH NORTHEAST OF EL
DORADO ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 629...WW 630...WW
633...WW 634...WW 635...

DISCUSSION...WRN END OF ELONGATED N TX/SE OK MCS HAS MOVED INTO AN
AREA SUPPORTIVE OF MODEST FORWARD /SWD/ PROPAGATION...WITH LARGE LOW
LVL TEMP-DEWPOINT SPREADS...15 KT SLY LLJ...AND 15-20 KT NNW MID LVL
FLOW. SCTD EMBEDDED STORMS MAY YIELD OCCASIONAL SPOTS OF DMGG WIND.
FARTHER E ACROSS SE OK/SW AR...GREATER SHEAR/HIGHER PW ENVIRONMENT
MAY YIELD SMALL EMBEDDED BOWS WITH WET MICROBURSTS/HAIL. SOME STORM
IN THIS REGION MAY PERSIST INTO LATE TONIGHT AS LLJ STRENGTHENS AND
VEERS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 33015.

...CORFIDI

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