

084 

WWUS20 KWNS 130500

SEL1

SPC WW 130500

IAZ000-ILZ000-MOZ000-131000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 161

NWS STORM PREDICTION CENTER NORMAN OK

1200 AM CDT THU MAY 13 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST IOWA

       WESTERN ILLINOIS

       NORTHERN MISSOURI



EFFECTIVE THIS THURSDAY MORNING FROM MIDNIGHT UNTIL 500 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

SOUTHWEST OF CHILLICOTHE MISSOURI TO 15 MILES SOUTHEAST OF PEORIA

ILLINOIS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 159...WW 160...



DISCUSSION...QUASI-LINEAR MCS HAS TAKEN FORM ACROSS NW MO AND SHOULD

CONTINUE TO POSE A HIGH WIND AND HAIL THREAT AS IT SPREADS EAST

ALONG INSTABILITY GRADIENT SITUATED ACROSS NCNTRL MO...SERN IA AND

INTO WRN IL EARLY TODAY. WIND GUSTS WITH THE SQUALL LINE HAVE

ALREADY REACHED SEVERE LEVELS AND EXPECT THIS THREAT TO CONTINUE EWD

TOWARD THE MS RIVER OVER THE NEXT FEW HOURS. SMALL SHEAR COUPLETS

WITHIN THE SQUALL LINE COULD BRIEFLY ENHANCE WIND DAMAGE POTENTIAL

WITH AN ISOLATED TORNADO STILL POSSIBLE.



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 25045.





...CARBIN

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