

786 

WWUS20 KWNS 051950

SEL9

SPC WW 051950

ILZ000-MOZ000-060200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 49

NWS STORM PREDICTION CENTER NORMAN OK

250 PM CDT MON APR 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL ILLINOIS

       EAST CENTRAL MISSOURI



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 250 PM UNTIL 900

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 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTH NORTHWEST OF

SAINT LOUIS MISSOURI TO 40 MILES EAST OF MATTOON ILLINOIS.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 48...



DISCUSSION...THUNDERSTORMS ARE INCREASING IN COVERAGE ACROSS CENTRAL

IL...IN VICINITY OF RETREATING SURFACE WARM FRONT.  MODERATE

INSTABILITY AND RATHER WEAK CAP WILL PROMOTE FURTHER INTENSIFICATION

THROUGH THE AFTERNOON AND EARLY EVENING.  FAVORABLE DEEP LAYER

VERTICAL SHEAR SUGGEST SUPERCELL STORM STRUCTURES ARE LIKELY...WITH

THE RISK OF LARGE HAIL AND DAMAGING WINDS.  ISOLATED TORNADOES

CANNOT BE RULED OUT DUE TO PROXIMITY OF WARM FRONT AND MOISTENING

BOUNDARY LAYER.



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 26030.





...HART

