Tornado Watch 124

Issued

Apr 11, 2007, 1:42 PM CDT (18:42 UTC)

Expired

Apr 11, 2007, 6:51 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Columbus AFB radar (KGWX), 86 km from the middle of the area, began a volume at 18:48 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

30%

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

20%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 455Apr 11, 12:16 PM CDT
• Mesoscale Discussion 458Apr 11, 3:27 PM CDT
• Mesoscale Discussion 461Apr 11, 6:23 PM CDT

000
WWUS20 KWNS 111842
SEL4  
SPC WW 111842
ALZ000-MSZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 124
NWS STORM PREDICTION CENTER NORMAN OK
140 PM CDT WED APR 11 2007

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

       CENTRAL AND NORTHERN ALABAMA
       EAST CENTRAL MISSISSIPPI

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 140 PM UNTIL
800 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
HUNTSVILLE ALABAMA TO 55 MILES EAST SOUTHEAST OF MERIDIAN
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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.

DISCUSSION...SKIES WILL CONTINUE TO CLEAR FROM WEST TO EAST ACROSS
WW THIS AFTERNOON AHEAD OF SURFACE COLD FRONT NOW MOVING INTO NWRN
AL/CENTRAL MS.  THIS WILL ALLOW EXPANDING AREA OF MARGINAL TO
MODERATE INSTABILITY TO DEVELOP OVER THE REGION INTO THE EVENING. 
LOW AND DEEP LAYER SHEAR WILL ALSO REMAIN QUITE STRONG.  THIS WILL
INCREASE THE POTENTIAL FOR SUPERCELLS AND SMALL LINE SEGMENTS. 
ALONG WITH LARGE HAIL AND DAMAGING WINDS...A FEW TORNADOES MAY ALSO
OCCUR WITH THE STRONGER STORMS.

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 26035.


...EVANS

Tornado Watches in Alabama, 2007Tornado Watches in Mississippi, 2007Every tornado watch in 2007

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.