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000 

WWUS20 KWNS 030918

SEL8

SPC WW 030918

IAZ000-ILZ000-MOZ000-031500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 108

NWS STORM PREDICTION CENTER NORMAN OK

420 AM CDT TUE APR 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST IOWA

       WEST CENTRAL ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS TUESDAY MORNING FROM 420 AM UNTIL 1000 AM CDT.



HAIL TO 2 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH

NORTHWEST OF MOLINE ILLINOIS TO 30 MILES SOUTHWEST OF QUINCY

ILLINOIS.  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 106...WW 107...



DISCUSSION...LINE OF INTENSE THUNDERSTORMS IS MOVING EASTWARD ACROSS

SOUTHERN IA AND NORTHERN MO.  THESE STORMS WILL LIKELY MAINTAIN

STRENGTH AS THEY TRACK ACROSS WATCH AREA THIS MORNING.  MESOSCALE

ORGANIZATION OF SQUALL LINE AND CONVERGENCE NEAR SURFACE WARM FRONT

WILL HELP TO PROMOTE A RISK OF LARGE HAIL AND DAMAGING WINDS IN

STRONGER STORMS.



AVIATION...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 500. MEAN STORM

MOTION VECTOR 27035.





...HART

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