

845 

WWUS20 KWNS 161944

SEL1

SPC WW 161944

IAZ000-ILZ000-MOZ000-170200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 401

NWS STORM PREDICTION CENTER NORMAN OK

245 PM CDT SAT JUN 16 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST IOWA

       NORTHWEST ILLINOIS

       NORTHEAST MISSOURI



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 245 PM UNTIL

900 PM 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH OF

KIRKSVILLE MISSOURI TO 65 MILES NORTH NORTHEAST 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 400...



DISCUSSION...A CLUSTER OF INTENSE STORMS IS ONGOING OVER SOUTHEAST

IA...WHILE STORMS ASSOCIATED WITH AN APPROACHING MCV ARE INCREASING

ACROSS MO.  ALL OF THIS ACTIVITY WILL SPREAD EASTWARD ACROSS THE

WATCH AREA THIS AFTERNOON AND EARLY EVENING.  FAVORABLE WESTERLY

FLOW THROUGH THE MID TROPOSPHERE COUPLED WITH HIGH CAPE VALUES WILL

PROMOTE STRONG DOWNBURST WINDS IN THE STRONGER STORMS.  LARGE HAIL

IS ALSO 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 26030.





...HART

