Tornado Watch 367

Issued

May 25, 2011, 5:46 AM CDT (10:46 UTC)

Expired

May 25, 2011, 1:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Two or more tornadoes

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 948May 25, 4:58 AM CDT
• Mesoscale Discussion 949May 25, 7:31 AM CDT
• Mesoscale Discussion 950May 25, 7:48 AM CDT
• Mesoscale Discussion 951May 25, 8:33 AM CDT
• Mesoscale Discussion 953May 25, 10:18 AM CDT
• Mesoscale Discussion 954May 25, 11:02 AM CDT

356 
WWUS20 KWNS 251048
SEL7
SPC WW 251048
ILZ000-MOZ000-251800-

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.

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 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.


...GUYER/CORFIDI

Tornado Watches in Illinois, 2011Tornado Watches in Indiana, 2011Tornado Watches in Missouri, 2011Every tornado watch in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.