Tornado Watch 145

Issued

Apr 15, 2011, 5:46 PM EDT (21:46 UTC)

Expired

Apr 15, 2011, 9:12 PM EDT

In force

3 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Atlanta radar (KFFC), 75 km from the middle of the area, began a volume at 21:48 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

20%

Ten or more severe wind reports

30%

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

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 438Apr 15, 2:30 PM EDT
• Mesoscale Discussion 441Apr 15, 5:30 PM EDT
• Mesoscale Discussion 446Apr 15, 8:52 PM EDT

337 
WWUS20 KWNS 152144
SEL5
SPC WW 152144
GAZ000-160400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 145
NWS STORM PREDICTION CENTER NORMAN OK
545 PM EDT FRI APR 15 2011

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

       WESTERN AND NORTHERN GEORGIA

EFFECTIVE THIS FRIDAY AFTERNOON FROM 545 PM UNTIL MIDNIGHT EDT.

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 45 STATUTE
MILES EAST AND WEST OF A LINE FROM 90 MILES NORTH NORTHEAST OF
ATLANTA GEORGIA TO 20 MILES SOUTHEAST OF LA GRANGE GEORGIA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 141...WW 142...WW
143...WW 144...

DISCUSSION...AN ISOLATED SUPERCELL HAS RECENTLY INTENSIFIED NEAR THE
WARM FRONT ACROSS N GA...WHILE OTHER STORMS ARE INCREASING SLOWLY
JUST W OF THE ERN AL/GA BORDER.  BOUNDARY LAYER DEWPOINTS IN THE
UPPER 50-LOWER 60S WILL BE SUFFICIENT TO SUPPORT SBCAPE OF AT LEAST
500-1000 J/KG...WHILE THE ATLANTA VWP SHOWS A WIND PROFILE CONDUCIVE
TO SUPERCELLS WITH A RISK FOR TORNADOES.  OTHERWISE...ISOLATED LARGE
HAIL AND DAMAGING GUSTS CAN BE EXPECTED WITH THE STRONGER STORMS
THROUGH TONIGHT.

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 24035.


...THOMPSON

Tornado Watches in Georgia, 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.