TORNADO WATCH NUMBER 193

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 193
NWS STORM PREDICTION CENTER NORMAN OK
1120 AM CDT SUN APR 16 2006

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL AND EASTERN IOWA
CENTRAL ILLINOIS
NORTHEAST AND EAST CENTRAL MISSOURI

EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1120 AM UNTIL 700
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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF CEDAR
RAPIDS IOWA TO 5 MILES SOUTHEAST OF SCOTT AFB ILLINOIS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU3).

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...TORNADO THREAT EXPECTED TO INCREASE ACROSS WW THIS
AFTERNOON AND CONTINUE INTO THE EVENING UNDERNEATH AND SOUTHEAST OF
STRONG UPPER LOW NOW OVER CENTRAL IA. LOW LEVEL SHEAR WILL REMAIN
QUITE STRONG NEAR A SURFACE WARM FRONT EXTENDING ACROSS CENTRAL
IL...AND AHEAD OF A LOW CENTER DEVELOPING EWD ALONG THIS FRONT
THROUGH THE DAY. SUPERCELLS DEVELOPING SSWWD INTO ERN MO ALONG A
SURFACE TROUGH WILL ALSO MAINTAIN A TORNADO THREAT UNDER STRONGER
WLY FLOW ALOFT. IN ADDITION...VERY STEEP LAPSE RATES AND STRONG
LARGE SCALE ASCENT WILL SUPPORT WIDESPREAD LARGE HAIL WITH THESE
STORMS THROUGH THE EARLY EVENING.

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 24030.


...EVANS