

000 

WWUS20 KWNS 010608

SEL9

SPC WW 010608

ILZ000-MOZ000-011200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 39

NWS STORM PREDICTION CENTER NORMAN OK

1210 AM CST THU MAR 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WEST CENTRAL ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS THURSDAY MORNING FROM 1210 AM UNTIL 600 AM CST.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES EAST

NORTHEAST OF QUINCY ILLINOIS TO 50 MILES WEST OF ALTON ILLINOIS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 36...WW 37...WW 38...



DISCUSSION...LARGELY ELEVATED CONVECTION SHOULD SPREAD ENEWD FROM

CENTRAL INTO NE MO AND EVENTUALLY W CENTRAL IL THE NEXT SEVERAL

HOURS.  MUCH OF THE CONVECTION WILL BE CONFINED TO N OF THE SURFACE

WARM FRONT...WHERE INCREASING WAA AND DESTABILIZATION JUST ABOVE THE

GROUND WILL SUPPORT A CONTINUATION OF THE ELEVATED THUNDERSTORMS

OVERNIGHT.  THE MORE INTENSE STORMS...WHICH COULD BE

SUPERCELLS...WILL BE CAPABLE OF PRODUCING LARGE HAIL.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 24035.





...THOMPSON

