Particularly Dangerous Situation Tornado Watch #57
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 57
NWS STORM PREDICTION CENTER NORMAN OK
955 AM CST FRI MAR 2 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND SOUTHERN ILLINOIS
CENTRAL AND SOUTHERN INDIANA
WESTERN KENTUCKY
SOUTHEAST MISSOURI EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 955 AM UNTIL 600
PM CST.
...THIS IS A PARTICULARLY DANGEROUS SITUATION... DESTRUCTIVE TORNADOES...LARGE 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 50 MILES SOUTH OF CAPE
GIRARDEAU MISSOURI TO 25 MILES NORTH OF DANVILLE 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 55...WW 56...
DISCUSSION...A VOLATILE ENVIRONMENT IS DEVELOPING TODAY ACROSS
NWD-EXPANDING WARM SECTOR...FEATURING MLCAPE VALUES OF 1000-2500
J/KG...DEEP-LAYER SHEAR OF 50-60 KT AND EFFECTIVE SRH OF 300-600
M2/S2. TSTMS DEVELOPING ALONG AND AHEAD OF COLD FRONT OVER SERN
MO/W-CNTRL IL ARE EXPECTED TO EVOLVE INTO INTENSE SUPERCELLS CAPABLE
OF LONG-TRACKED...SIGNIFICANT TORNADOES. LARGE HAIL AND DAMAGING
WINDS ARE ALSO LIKELY.
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 25045.
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