WATCHES: Severe Thunderstorm Watch Number 693

WWUS20 KWNS 251459
SEL3
SPC WW 251459
ARZ000-LAZ000-MSZ000-TXZ000-252200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 693
NWS STORM PREDICTION CENTER NORMAN OK
855 AM CST TUE DEC 25 2012

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

EXTREME SOUTHERN ARKANSAS
NORTHERN LOUISIANA
EXTREME WESTERN MISSISSIPPI
NORTHEAST TEXAS

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 855 AM UNTIL
400 PM CST.

HAIL TO 2 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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTHWEST
OF LONGVIEW TEXAS TO 55 MILES EAST OF MONROE LOUISIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).

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 691...WW 692...

DISCUSSION...SVR TSTMS WITH HAIL AND ISOLATED GUSTS SHOULD INCREASE
IN COVERAGE AND SHIFT ENEWD ACROSS WW AREA THROUGH AFTN...N OF SFC
WARM FRONT OVER SE TX AND SRN LA. 40-50 KT EFFECTIVE SHEAR
MAGNITUDES AND ELEVATED MUCAPE UP TO 1000 J/KG WILL SUPPORT TSTM
ORGANIZATION.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 24040.


...EDWARDS

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