Tornado Watch 25

Issued

Feb 27, 2011, 9:40 PM CST (03:40 UTC)

Expired

Feb 28, 2011, 3:44 AM CST

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The St Louis radar (KLSX), 55 km from the middle of the area, began a volume at 03:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 158Feb 27, 8:25 PM CST
• Mesoscale Discussion 160Feb 27, 10:41 PM CST
• Mesoscale Discussion 165Feb 28, 1:05 AM CST

079 
WWUS20 KWNS 280341
SEL5
SPC WW 280341
ILZ000-MOZ000-281000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 25
NWS STORM PREDICTION CENTER NORMAN OK
940 PM CST SUN FEB 27 2011

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

       SOUTHERN AND WEST CENTRAL ILLINOIS
       EAST CENTRAL AND SOUTHEAST MISSOURI

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 940 PM UNTIL
400 AM CST.

TORNADOES...HAIL TO 2 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 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES WEST OF FORT
LEONARD WOOD MISSOURI TO 45 MILES EAST OF MOUNT VERNON ILLINOIS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 23...WW 24...

DISCUSSION...LINES/CLUSTERS OF SEVERE STORMS ARE ORGANIZING ACROSS
CENTRAL AND SOUTHWEST MO.  THESE STORMS ARE EXPECTED TO TRACK
RAPIDLY EASTWARD ACROSS THE WATCH AREA THROUGH THE EARLY MORNING
HOURS.  SUPERCELLS CAPABLE OF TORNADOES /INCLUDING STRONG TORNADOES/
ARE A CONCERN.  AN EVENTUAL EVOLUTION INTO BOWING SEGMENTS COULD
ALSO INCREASE THE RISK OF WIDESPREAD DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 25040.


...HART

Tornado Watches in Illinois, 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; radar from the NEXRAD Level II archive.