WATCHES: Severe Thunderstorm Watch Number 161

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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