Tornado Watch 389

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 389
NWS STORM PREDICTION CENTER NORMAN OK
815 PM CDT THU MAY 29 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND SOUTH CENTRAL IOWA
FAR NORTHEAST KANSAS
NORTHWEST AND NORTH CENTRAL MISSOURI
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 815 PM
UNTIL 300 AM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 70 MILES NORTH OF DES MOINES
IOWA TO 40 MILES WEST OF CHILLICOTHE MISSOURI. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU9).
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.
DISCUSSION...STRENGTHENING SWLY LOW LEVEL JET EXTENDING INTO IA/NWRN
MO THIS EVENING THROUGH TONIGHT WILL MAINTAIN STRONG LOW LEVEL SHEAR
AND LARGE HODOGRAPHS FOR A TORNADO THREAT TO DEVELOP EWD INTO
CENTRAL IA AND NWRN-NORTH CENTRAL MO. AN EVOLVING LINEAR MODE WITH
EMBEDDED SUPERCELLS ACROSS ERN NEB/WEST CENTRAL IA IS EXPECTED TO
SPREAD EWD PRODUCING AN INCREASED THREAT FOR DAMAGING WINDS WITH ANY
BOW STRUCTURES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 27040.
...PETERS/THOMPSON