

345 

WWUS20 KWNS 042035

SEL5

SPC WW 042035

IAZ000-ILZ000-KSZ000-MOZ000-050400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 45

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT SUN APR 4 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST IOWA

       WEST CENTRAL ILLINOIS

       EXTREME EASTERN KANSAS

       CENTRAL AND NORTHERN MISSOURI



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2.5 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 70 STATUTE

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

ILLINOIS TO 15 MILES NORTHWEST OF OLATHE KANSAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU5).



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...THUNDERSTORMS ARE EXPECTED TO INTENSIFY RAPIDLY THIS

AFTERNOON ALONG A WEAK FRONTAL ZONE EXTENDING FROM NORTHEAST

KS...ACROSS NORTHERN MO...INTO WESTERN IL.  RAPID RETURN OF LOW

LEVEL MOISTURE AND STRONG HEATING SOUTH OF THE FRONT WILL

DESTABILIZE REGION...WHILE STRONG SOUTHERLY LOW LEVEL WINDS ENHANCE

VERTICAL SHEAR.  SUPERCELLS ARE EXPECTED EARLY WITH A RISK OF LARGE

HAIL AND ISOLATED TORNADOES.  DURING THEN EVENING...ACTIVITY WILL

LIKELY CONGEAL INTO A SQUALL LINE AND TRACK EASTWARD ACROSS NORTHERN

IL WITH A RISK OF HAIL AND DAMAGING WINDS.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24035.





...HART

