

897 

WWUS20 KWNS 110033

SEL4

SPC WW 110033

ARZ000-MOZ000-OKZ000-110800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 124

NWS STORM PREDICTION CENTER NORMAN OK

730 PM CDT SUN APR 10 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND NORTHERN ARKANSAS

       SOUTHWEST AND SOUTH CENTRAL MISSOURI

       EASTERN AND SOUTHERN OKLAHOMA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 730 PM UNTIL

300 AM 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH OF VICHY

MISSOURI TO 40 MILES EAST SOUTHEAST OF ARDMORE OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 120...WW 121...WW

122...WW 123...



DISCUSSION...TSTMS EXPECTED TO FORM IN THE NEXT HOUR OR SO ALONG DRY

LINE FROM SW MO SSW INTO S CNTRL OK...AS UVV BEGINS TO INCREASE WITH

APPROACH OF W TX UPR IMPULSE.  AMPLE SHEAR SHOULD PERSIST FOR

SUPERCELLS.  SETUP APPEARS FAVORABLE FOR EVENTUAL EVOLUTION INTO

BROKEN LINE SEGMENTS/LEWPS WITH AN ATTENDANT THREAT FOR POSSIBLE

TORNADOES IN ADDITION TO SVR WIND/HAIL GIVEN 40+ KT 850-700 MB FLOW

BENEATH 70+ KT 500 MB WIND IN ENTRANCE REGION OF DEVELOPING UPR LVL

JET STREAK.



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

550. MEAN STORM MOTION VECTOR 24045.





...CORFIDI

