Tornado Watch 149

Issued

Apr 13, 2009, 9:12 AM CDT (14:12 UTC)

Expired

Apr 13, 2009, 6:00 PM CDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Eglin Afb radar (KEVX), 45 km from the middle of the area, began a volume at 14:14 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

10%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 464Apr 13, 7:27 AM CDT
• Mesoscale Discussion 465Apr 13, 11:15 AM CDT
• Mesoscale Discussion 471Apr 13, 5:22 PM CDT

623 
WWUS20 KWNS 131408
SEL9  
SPC WW 131408
ALZ000-FLZ000-GAZ000-CWZ000-132100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 149
NWS STORM PREDICTION CENTER NORMAN OK
1010 AM EDT MON APR 13 2009

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

       SOUTHEAST ALABAMA
       FLORIDA PANHANDLE
       SOUTHWEST GEORGIA
       COASTAL WATERS

EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1010 AM UNTIL
500 PM EDT.

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 45 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 5 MILES NORTHWEST OF
PENSACOLA FLORIDA TO 20 MILES NORTH NORTHEAST OF VALDOSTA
GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 148. WATCH NUMBER 148 WILL NOT BE IN EFFECT AFTER
1010 AM EDT. 

DISCUSSION...LINEAR MCS WILL PERSIST ACROSS THE REGION TODAY WITHIN
BAND OF STRONG WSWLY FLOW ALOFT AHEAD OF EJECTING SHORTWAVE TROUGH. 
MODEST SURFACE HEATING AND CONTINUED MOISTENING AT THE SURFACE IS
EXPECTED TO SUPPORT MARGINAL TO MODERATE SURFACE-BASED INSTABILITY
BY THE LATE MORNING/EARLY AFTERNOON.  GIVEN DEGREE OF SHEAR...THIS
SHOULD SUPPORT A CONTINUED THREAT OF ISOLATED SEVERE
THUNDERSTORMS...INCLUDING TORNADO POTENTIAL.  VERY HEAVY RAINFALL
WILL ALSO ACCOMPANY THESE STORMS.

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
500. MEAN STORM MOTION VECTOR 26030.


...EVANS

Tornado Watches in Georgia, 2009Tornado Watches in Florida, 2009Tornado Watches in Alabama, 2009Every tornado watch in 2009

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.