URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 367
NWS STORM PREDICTION CENTER NORMAN OK
545 AM CDT WED MAY 25 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND EASTERN ILLINOIS
FAR SOUTHEAST MISSOURI
EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 545 AM UNTIL
100 PM CDT.
ISOLATED TORNADOES
SCATTERED DAMAGING WINDS
ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
WIDELY SCATTERED LARGE HAIL TO 1.5 INCHES IN DIAMETER
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 15 MILES EAST NORTHEAST OF
MARSEILLES ILLINOIS TO 5 MILES EAST SOUTHEAST OF CARBONDALE
ILLINOIS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
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 366...
DISCUSSION...A BROKEN QUASI-LINEAR CONVECTIVE SYSTEM WILL CONTINUE
TO STEADILY ADVANCE NORTHEASTWARD THIS MORNING ACROSS A LARGE PART
OF CENTRAL AND EASTERN IL. A RELATIVELY WARM/MOIST MORNING AIRMASS
WILL CONTINUE TO DESTABILIZE WITH ADDITIONAL HEATING AFTER
SUNRISE...WHILE AN INCREASINGLY STRONG DEEP LAYER WIND FIELD WILL
SUPPORT ORGANIZED/FAST MOVING QUASI-LINEAR STRUCTURES CAPABLE OF
DAMAGING WINDS AND ISOLATED TORNADOES.
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
450. MEAN STORM MOTION VECTOR 22045.
