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WWUS20 KWNS 081543

SEL9

SPC WW 081543

ILZ000-INZ000-KYZ000-MOZ000-082100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 49

NWS STORM PREDICTION CENTER NORMAN OK

1040 AM CDT SUN MAR 8 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ILLINOIS

       WESTERN INDIANA

       WESTERN KENTUCKY

       SOUTHEAST MISSOURI



EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 1040 AM UNTIL

400 PM CDT.



TORNADOES...HAIL TO 1.5 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 100 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH NORTHWEST OF

DANVILLE ILLINOIS TO 50 MILES SOUTH SOUTHEAST OF CAPE GIRARDEAU

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.



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



DISCUSSION...BROKEN LINE OF SUPERCELLS WILL CONTINUE MOVING RAPIDLY

ENEWD ACROSS WW THROUGH THE AFTERNOON AHEAD OF EJECTING SHORTWAVE

TROUGH AND ALONG AXIS OF 90 KT MID LEVEL JET.  LOW LEVEL AIR MASS

WILL CONTINUE TO RECOVER NWD THROUGH THE DAY AS SURFACE LOW MOVES

NEWD TOWARDS NERN IL...LEAVING A BROAD WARM SECTOR CHARACTERIZED BY

MARGINAL INSTABILITY.  ENHANCED WIND FIELDS WILL SUPPORT FAST STORM

MOTIONS AND WIND DAMAGE WITH THESE STORMS...WITH SIGNIFICANT SHEAR

SUSTAINING A RISK OF ISOLATED TORNADOES.  ISOLATED LARGE HAIL WILL

BE ADDITIONAL RISK.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24045.





...EVANS

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