Tornado Watch 612

Issued

Sep 3, 2012, 3:46 PM CDT (20:46 UTC)

Expired

Sep 3, 2012, 11:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Columbus AFB radar (KGWX), 116 km from the middle of the area, began a volume at 20:46 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

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1869Sep 3, 12:29 PM CDT
• Mesoscale Discussion 1873Sep 3, 3:25 PM CDT
• Mesoscale Discussion 1875Sep 3, 6:55 PM CDT
• Mesoscale Discussion 1878Sep 3, 9:28 PM CDT

497 
WWUS20 KWNS 032050
SEL2  
SPC WW 032050
ALZ000-MSZ000-040400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 612
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT MON SEP 3 2012

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

       WESTERN AND CENTRAL ALABAMA
       CENTRAL AND EASTERN MISSISSIPPI

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
1100 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST NORTHWEST OF
COLUMBUS MISSISSIPPI TO 60 MILES SOUTH SOUTHWEST OF SELMA
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 611...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN STRENGTH/COVERAGE OVER
THE NEXT 2-3 HOURS FROM  E CNTRL MS INTO CNTRL AL...INVOF 850 MB
CONFLUENCE ZONE ON SRN FRINGE OF REMNANT CIRCULATION OF FORMER TC
ISAAC. THIS ZONE ALSO COINCIDES WHERE GREATEST HEATING HAS OCCURRED
THIS AFTN...AND ALSO COINCIDES WITH AXIS OF MAXIMUM LOW-LVL
MOISTURE. SETUP COULD YIELD A COUPLE LONGER-LASTING SUPERCELLS WITH
LOW-LVL MESO/TORNADOES...IN ADDITION TO DMGG WIND. THE STRONGEST
STORMS SHOULD TRACK MORE OR LESS SEWD ALONG OUTFLOW BOUNDARY
SEGMENTS LEFT BY EARLIER CONVECTION.

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
550. MEAN STORM MOTION VECTOR 31025.


...CORFIDI

Tornado Watches in Alabama, 2012Tornado Watches in Mississippi, 2012Every tornado watch in 2012

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.