

000 

WWUS20 KWNS 260055

SEL8

SPC WW 260055

IAZ000-ILZ000-MOZ000-260800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 368

NWS STORM PREDICTION CENTER NORMAN OK

755 PM CDT SUN MAY 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN...CENTRAL AND EASTERN IOWA

       NORTHWESTERN ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 755 PM UNTIL

300 AM CDT.



TORNADOES...HAIL TO 3 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 130 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHWEST OF DUBUQUE

IOWA TO 15 MILES EAST OF LAMONI IOWA.  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 363. WATCH NUMBER 363 WILL NOT BE IN EFFECT AFTER

755 PM CDT. CONTINUE...WW 358...WW 360...WW 361...WW 362...WW

364...WW 365...WW 366...WW 367...



DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO PERSIST ALONG AND AHEAD OF

COLD FRONT AND PREFRONTAL TROUGH OVER IA/NW IL.  OTHER STORMS MAY

FORM LATER THIS EVENING INVOF DIFFUSE WARM FRONT OVER FAR WRN IL.

AMPLE SHEAR AND LOW-LEVEL MOISTURE ARE PRESENT TO SUGGEST THREAT FOR

ADDITIONAL TORNADOES...DESPITE EXPECTED TENDENCY FOR STORM MODE TO

BECOME LESS DISCRETE WITH TIME.  OTHER SVR STORMS...MAINLY POSING A

THREAT FOR HIGH WIND AND PERHAPS HAIL...EXPECTED TO

FORWARD-PROPAGATE ENE INTO WW FROM MCS NOW IN NE KS/SE NEB.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 27035.





...CORFIDI

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