Tornado Watch 230

Issued

Apr 27, 2011, 8:08 AM CDT (13:08 UTC)

Expired

Apr 27, 2011, 1:45 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Columbus AFB radar (KGWX), 61 km from the middle of the area, began a volume at 13:09 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

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 616Apr 27, 6:25 AM CDT
• Mesoscale Discussion 620Apr 27, 10:45 AM CDT
• Mesoscale Discussion 621Apr 27, 11:39 AM CDT
• Mesoscale Discussion 626Apr 27, 1:05 PM CDT

527 
WWUS20 KWNS 271309
SEL0
SPC WW 271309
ALZ000-MSZ000-271900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 230
NWS STORM PREDICTION CENTER NORMAN OK
810 AM CDT WED APR 27 2011

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

       NORTHERN ALABAMA
       NORTHERN MISSISSIPPI

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 810 AM UNTIL
200 PM CDT.

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 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST OF OXFORD
MISSISSIPPI TO 30 MILES NORTH NORTHEAST OF GADSDEN ALABAMA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 226...WW 227...WW
228...WW 229...

DISCUSSION...STORMS DEVELOPING ACROSS NRN MS THROUGH NRN AL ARE
EMBEDDED WITHIN VERY STRONG VERTICAL SHEAR PROFILES WITH LARGE
HODOGRAPHS. AS THE ATMOSPHERE DESTABILIZES...POTENTIAL WILL EXIST
FOR TORNADOES...DAMAGING WIND AND LARGE HAIL.

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
500. MEAN STORM MOTION VECTOR 24035.


...DIAL

Tornado Watches in Mississippi, 2011Tornado Watches in Alabama, 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.