Tornado Watch 27

Issued

Feb 27, 2011, 11:46 PM CST (05:46 UTC)

Expired

Feb 28, 2011, 5:00 AM CST

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Indianapolis radar (KIND), 95 km from the middle of the area, began a volume at 05:49 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

60%

One or more gusts of 65 knots or more

40%

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

80%

• Mesoscale Discussion 158Feb 27, 8:25 PM CST
• Mesoscale Discussion 165Feb 28, 1:05 AM CST
• Mesoscale Discussion 166Feb 28, 2:32 AM CST

967 
WWUS20 KWNS 280544
SEL7
SPC WW 280544
ILZ000-INZ000-281100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 27
NWS STORM PREDICTION CENTER NORMAN OK
1245 AM EST MON FEB 28 2011

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

       EAST CENTRAL ILLINOIS
       CENTRAL AND SOUTHWEST INDIANA

EFFECTIVE THIS MONDAY MORNING FROM 1245 AM UNTIL 600 AM EST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES SOUTHWEST OF TERRE
HAUTE INDIANA TO 50 MILES EAST SOUTHEAST OF INDIANAPOLIS INDIANA.
 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 24...WW 25...WW 26...

DISCUSSION...INTENSE BOW ECHO IN THE STL AREA WILL RACE
EAST-NORTHEASTWARD INTO THE WATCH DURING THE NEXT FEW HOURS.  STORMS
ARE TRACKING ALONG AND SOUTH OF SURFACE WARM FRONT...WITH POTENTIAL
FOR WIDESPREAD DAMAGING WINDS.  VERY STRONG LOW LEVEL SHEAR WILL
ALSO POSE THE RISK FOR QLCS TORNADOES EMBEDDED IN THE SQUALL LINE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24045.


...HART

Tornado Watches in Indiana, 2011Tornado Watches in Illinois, 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.