National Weather Service
Paducah, Kentucky
Serving Kentucky, Illinois, Indiana & Missouri

SEL5  

ILZ000-INZ000-KYZ000-MOZ000-070500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 275 
NWS STORM PREDICTION CENTER NORMAN OK 
540 PM CDT TUE MAY 6 2003

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

       SOUTHERN ILLINOIS
       EXTREME SOUTHWEST INDIANA
       WESTERN KENTUCKY
       EAST AND SOUTHEAST MISSOURI

EFFECTIVE THIS TUESDAY AFTERNOON FROM 540 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 90 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 85 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 70 MILES SOUTH SOUTHWEST OF SAINT LOUIS
MISSOURI TO 10 MILES NORTH OF OWENSBORO KENTUCKY.

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 269...WW 270...WW 271...WW
272...WW 273...WW 274...

DISCUSSION...THE ENVIRONMENT ACROSS ERN MO/SRN IL/WRN KY APPEARS
FAVORABLE FOR THE MAINTENANCE OF THE INTENSE SUPERCELL/BOW ECHO
CLUSTER NOW ACROSS CENTRAL MO.   EXPECT THESE STORMS TO MOVE ESEWD
ALONG THE OUTFLOW BOUNDARY FROM ERN MO TO SRN IL/WRN KY WHERE NEAR
70 DEWPOINTS ARE SUPPORTING MLCAPE NEAR 2500 J/KG...AND VERTICAL
SHEAR IS QUITE FAVORABLE FOR SUPERCELLS.  THE DEGREE OF
INSTABILITY/SHEAR AND THE MESOSCALE ORGANIZATION OF THE STORMS
SUGGESTS THE POSSIBILITY OF VERY LARGE/DAMAGING HAIL AND INTENSE
OUTFLOW WINDS WITH THE EMBEDDED SUPERCELLS...IN ADDITION TO THE
THREAT OF TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
MEAN STORM MOTION VECTOR 28035.
...THOMPSON

The user assumes the entire risk related to the use of this data. NWS is providing this data "as is," and NWS disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NWS be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of this data. For more information on the availability of information, visit: http://www.nws.noaa.gov/disclaimer.html  

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.