Tornado Watch 30

Issued

Feb 19, 2009, 1:58 AM EST (06:58 UTC)

Expired

Feb 19, 2009, 9:00 AM EST

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Two or more tornadoes

30%

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

30%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 133Feb 18, 11:55 PM EST
• Mesoscale Discussion 135Feb 19, 1:41 AM EST
• Mesoscale Discussion 137Feb 19, 4:19 AM EST
• Mesoscale Discussion 138Feb 19, 7:06 AM EST

175 
WWUS20 KWNS 190658
SEL0  
SPC WW 190658
FLZ000-GAZ000-CWZ000-191400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 30
NWS STORM PREDICTION CENTER NORMAN OK
155 AM EST THU FEB 19 2009

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

       NORTHERN FLORIDA AND THE FLORIDA PANHANDLE
       SOUTH GEORGIA
       COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING FROM 155 AM UNTIL 900 AM EST.

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 145 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF
WAYCROSS GEORGIA TO 5 MILES WEST SOUTHWEST OF APALACHICOLA
FLORIDA.  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...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 29. WATCH NUMBER 29 WILL NOT BE IN
EFFECT AFTER 155 AM EST. CONTINUE...WW 26...WW 27...WW 28...

DISCUSSION...SUSTAINED STORMS/SUPERCELLS EXPECTED TO PERSIST THROUGH
AT LEAST 12Z ALONG LOOSELY-ORGANIZED PRE-FRONTAL CONFLUENCE AXIS
EXTENDING WSW FROM NEAR VAD.  ABSENCE OF STRONG LINEAR
FORCING...LONG RESIDENCE TIMES OF STORMS IN SATELLITE-DERIVED PW
AXIS...VERY STRONG/SLIGHTLY CURVED WIND PROFILES...AND EXPECTED
STRENGTHENING OF WIND FIELD/ LARGE SCALE ASCENT WITH CONTINUED
AMPLIFICATION OF LARGER SCALE TROUGH SUGGEST POTENTIAL FOR
SEMI-DISCRETE SVR STORMS AND ISOLD STRONG TORNADOES.

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
450. MEAN STORM MOTION VECTOR 27045.


...CORFIDI

Tornado Watches in Georgia, 2009Tornado Watches in Florida, 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.