

404 

WWUS20 KWNS 100353

SEL8

SPC WW 100353

ILZ000-KYZ000-MOZ000-101000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 128

NWS STORM PREDICTION CENTER NORMAN OK

1050 PM CDT THU APR 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN ILLINOIS

       WESTERN KENTUCKY

       SOUTHEAST MISSOURI



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1050 PM

UNTIL 500 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTHWEST

OF FARMINGTON MISSOURI TO 55 MILES NORTHEAST OF PADUCAH KENTUCKY.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 125...WW 126...



DISCUSSION...LINE OF THUNDERSTORMS CONTINUES MOVING EWD ACROSS

SOUTHEAST MISSOURI...AHEAD OF A STRONG MID-LEVEL LOW PROGRESSING EWD

ACROSS SOUTHEAST KANSAS/NORTHEAST OKLAHOMA.  LIMITED INSTABILITY

EXISTS ACROSS MOST OF THIS REGION NORTH OF A WARM FRONT LYING OVER

EXTREME SERN MO/WRN TN...BUT THE INTENSITY OF THE APPROACHING SYSTEM

AND STRONG DEEP-LAYER WIND FIELD SUGGESTS THAT A THREAT FOR

LOCALLY-DAMAGING WINDS AND HAIL WILL PERSIST OVER THE NEXT FEW HOURS

AS THIS LINE OF CONVECTION PASSES FROM WEST TO EAST ACROSS THE WATCH

AREA.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM

MOTION VECTOR 25040.





...GOSS

