

582 

WWUS20 KWNS 010210

SEL8

SPC WW 010210

ARZ000-MOZ000-OKZ000-TXZ000-010900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 118

NWS STORM PREDICTION CENTER NORMAN OK

910 PM CDT FRI APR 30 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN ARKANSAS

       THE MISSOURI BOOTHEEL

       EXTREME SOUTHEAST OKLAHOMA

       EXTREME NORTHEAST TEXAS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 910 PM

UNTIL 400 AM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF WALNUT

RIDGE ARKANSAS TO 30 MILES SOUTH OF TEXARKANA ARKANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 116. WATCH NUMBER 116 WILL NOT BE IN EFFECT AFTER

910 PM CDT. CONTINUE...WW 117...



DISCUSSION...DANGEROUS TORNADO SITUATION IS EXPECTED TO PERSIST

OVERNIGHT AS MULTIPLE DISCRETE SUPERCELLS TRACK THROUGH A

MOIST...MODERATELY UNSTABLE...AND STRONGLY SHEARED ENVIRONMENT.

GIVEN THE RECENT DEVELOPMENT OF SUPERCELLS IN A WARM SECTOR

CONFLUENCE BAND RUNNING THROUGH THE LITTLE ROCK AREA...THE TORNADO

THREAT WILL SOON EXTEND EAST INTO MOST OF ERN AR.  A FEW

LONG-TRACK...STRONG TORNADOES ARE EXPECTED.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...THOMPSON

