WATCHES: Tornado Watch Number 721

WWUS20 KWNS 260919
SEL1
SPC WW 260919
ARZ000-ILZ000-INZ000-KYZ000-MOZ000-MSZ000-TNZ000-261700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 721
NWS STORM PREDICTION CENTER NORMAN OK
405 AM CDT TUE OCT 26 2010

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

SOUTHWEST THROUGH NORTHEASTERN ARKANSAS
SOUTHERN ILLINOIS
SOUTHWEST INDIANA
WESTERN KENTUCKY
SOUTHEASTERN MISSOURI
NORTHERN MISSISSIPPI
WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY MORNING FROM 405 AM UNTIL NOON CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES EAST NORTHEAST OF
MOUNT VERNON ILLINOIS TO 30 MILES SOUTH SOUTHEAST OF PINE BLUFF
ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 719...WW 720...

DISCUSSION...TSTMS EXPECTED TO SLOWLY INCREASE ALONG AR/SRN MO COLD
FRONT THROUGH LATER THIS MORNING AS FRONT CONTINUES ESE INTO WRN
PARTS OF KY/TN AND NW MS. DEEP FORCING FOR ASCENT WILL BE WEAKER
COMPARED TO AREAS FARTHER N. BUT COMBINATION OF LOW LVL FORCED
UPLIFT ALONG FRONT AND INCREASINGLY RICH MOISTURE /PW 1.25-1.50
INCHES/ SUGGESTS AN INCREASING LIKELIHOOD THAT EXISTING CINH WILL BE
OVERCOME AS POWERFUL NRN MO/IA UPR TROUGH GLANCES WATCH AREA. THIS
SHOULD LEAD TO A BROKEN BAND OR TWO OF STORMS LATER THIS MORNING
FROM SE MO AND THE AR/MS DELTA REGION INTO WRN TN/WRN KY. GIVEN
SUSTAINED UPDRAFTS...WIND FIELD WILL BE FAVORABLE FOR SUPERCELLS
POSING A RISK FOR BOTH TORNADOES AND SMALL BOWS WITH DMGG WIND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24050.

...CORFIDI

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