Tornado Watch 292

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 292
NWS STORM PREDICTION CENTER NORMAN OK
1010 AM CDT SAT MAY 10 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN ARKANSAS
NORTHERN LOUISIANA
WEST-CENTRAL MISSISSIPPI
EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 1010 AM UNTIL
400 PM CDT.
TORNADOES...HAIL TO 2 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 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTH NORTHWEST OF
TEXARKANA ARKANSAS TO 25 MILES NORTH NORTHEAST OF JACKSON
MISSISSIPPI. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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.
DISCUSSION...WELL-DEFINED WARM FRONT CURRENTLY ALONG LA/AR BORDER
EAST TO CNTRL MS WILL CONTINUE TO LIFT NWD ACROSS WATCH AREA INTO
THE AFTERNOON AS INCREASING LARGE SCALE ASCENT SPREADS EAST WITH
STRONG UPPER WAVE. INCREASINGLY MOIST/UNSTABLE AIR MASS WILL FUEL
TSTM DEVELOPMENT WITH SURFACE-BASED SUPERCELLS MOST LIKELY
DEVELOPING ACROSS THE AREA LATER THIS AFTERNOON. SHEAR PROFILES IN
THE WARM SECTOR...AND ESPECIALLY NEAR THE WARM FRONT...ARE FORECAST
TO BE QUITE SUPPORTIVE OF LOW LEVEL STORM ROTATION/MESOCYCLONES WITH
EFFECTIVE SRH VALUES IN SOME AREAS FORECAST TO EXCEED 200 M2/S2.
THUS...A FEW TORNADIC SUPERCELLS APPEAR POSSIBLE WITH ADDITIONAL
THREATS OF LARGE HAIL AND DAMAGING OUTFLOW WINDS.
AVIATION...TORNADOES AND 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 27030.
..CARBIN
ARKANSAS COUNTIES INCLUDED ARE
ARKANSAS ASHLEY BRADLEY
CALHOUN CHICOT CLARK
CLEVELAND COLUMBIA DALLAS
DESHA DREW GARLAND
GRANT HEMPSTEAD HOT SPRING
HOWARD JEFFERSON LAFAYETTE
LINCOLN LITTLE RIVER LOGAN
LONOKE MILLER MONTGOMERY
NEVADA OUACHITA PERRY
PIKE POLK PULASKI
SALINE SCOTT SEVIER
UNION YELL
MISSISSIPPI COUNTIES INCLUDED ARE
BOLIVAR CARROLL CLAIBORNE
COPIAH GRENADA HINDS
HOLMES HUMPHREYS ISSAQUENA
LEFLORE MADISON RANKIN
SHARKEY SIMPSON SUNFLOWER
WARREN WASHINGTON YAZOO