WATCHES: Tornado Watch Number 276

WWUS20 KWNS 080240
SEL6
SPC WW 080240
ARZ000-LAZ000-080800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 276
NWS STORM PREDICTION CENTER NORMAN OK
935 PM CDT WED MAY 7 2008

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

ARKANSAS
NORTHERN LOUISIANA

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 935 PM
UNTIL 300 AM CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF FLIPPIN
ARKANSAS TO 10 MILES WEST OF ALEXANDRIA LOUISIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 275...

DISCUSSION...IMPRESSIVE LARGE SCALE SYSTEM WILL MAINTAIN WIDESPREAD
STRONG/SEVERE THUNDERSTORMS SPREADING ENEWD ACROSS WW OVERNIGHT.
SHEAR WILL REMAIN QUITE STRONG...ALTHOUGH INSTABILITY FIELDS ARE
MARGINAL...ESPECIALLY INTO CENTRAL/NRN AR WHERE RAIN HAS BEEN
PERSISTENT THIS EVENING. HOWEVER...INFLUX OF RICHER MOISTURE OUT OF
THE NWRN GULF OF MEXICO AND VERY STRONG/DEEP ASCENT WILL MAINTAIN
THUNDERSTORMS ROOTING NEAR THE BOUNDARY LAYER. DAMAGING WINDS WILL
BE PRIMARY SEVERE THREAT OVERNIGHT...ALTHOUGH ISOLATED TORNADO
POTENTIAL WILL ALSO PERSIST AS ACTIVITY REMAINS IN PROXIMITY TO
50-60 KT SLY LLJ.

AVIATION...TORNADOES AND 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
400. MEAN STORM MOTION VECTOR 24035.

...EVANS

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