

796 

WWUS20 KWNS 302326

SEL6

SPC WW 302326

ARZ000-MOZ000-OKZ000-TXZ000-010700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 116

NWS STORM PREDICTION CENTER NORMAN OK

625 PM CDT FRI APR 30 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN...CENTRAL...AND SOUTHWEST ARKANSAS

       SOUTH CENTRAL AND SOUTHEAST MISSOURI

       EXTREME SOUTHEAST OKLAHOMA

       EXTREME NORTHEAST TEXAS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 625 PM

UNTIL 200 AM CDT.



TORNADOES...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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 85 MILES NORTHEAST OF WEST

PLAINS MISSOURI TO 30 MILES SOUTH SOUTHWEST OF TEXARKANA

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 114. WATCH NUMBER 114 WILL NOT BE IN EFFECT AFTER

625 PM CDT. CONTINUE...WW 112...WW 113...WW 115...



DISCUSSION...BROKEN BAND OF SUPERCELLS WILL LIKELY PERSIST WELL INTO

THE OVERNIGHT HOURS FROM NE TX ACROSS AR INTO S/SE MO.  THE

CONVECTION WILL BE MAINTAINED BY AN INFLUX OF NEAR 70 F BOUNDARY

LAYER DEWPOINTS AND ASSOCIATED MODERATE INSTABILITY...WHILE VERTICAL

SHEAR WILL REMAIN FAVORABLE FOR ROTATING STORMS.  TORNADOES...LARGE

HAIL AND DAMAGING WINDS WILL BE POSSIBLE WITH MANY OF THESE STORMS.

THE RICH MOISTURE AND RELATIVELY STRONG LOW-LEVEL SHEAR...ALONG WITH

MULTIPLE DISCRETE STORMS...WILL SUPPORT THE THREAT FOR A COUPLE OF

STRONG TORNADOES.



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

