

000 

WWUS20 KWNS 142035

SEL3

SPC WW 142035

ALZ000-ARZ000-MSZ000-TNZ000-150200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 733

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CST WED NOV 14 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST ALABAMA

       EASTERN ARKANSAS

       NORTHERN MISSISSIPPI

       WESTERN AND MIDDLE TENNESSEE



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

800 PM CST.



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 100

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHEAST OF

JACKSON TENNESSEE TO 15 MILES EAST SOUTHEAST OF GREENWOOD

MISSISSIPPI.  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.



DISCUSSION...SCATTERED THUNDERSTORMS...INCLUDING A FEW SEVERE

STORMS...HAVE ALREADY DEVELOPED AS OF 20Z OVER WRN AND PARTS OF

MIDDLE TN.  AIR MASS IS BECOMING MARGINAL TO MODERATELY UNSTABLE

ACROSS WW AND BOTH DEEP ASCENT AND SHEAR ARE EXPECTED TO INCREASE

THROUGH THE EVENING.  EXPECT THUNDERSTORM COVERAGE AND INTENSITY TO

THEREFORE INCREASE WITH PRIMARY THREATS OF LARGE HAIL AND DAMAGING

WINDS...WITH POTENTIAL FOR SUPERCELLS AND SMALL LINES.



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 400. MEAN STORM

MOTION VECTOR 29035.





...EVANS

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