Tornado Watch 147

Issued

Apr 15, 2011, 9:12 PM EDT (01:12 UTC)

Expired

Apr 16, 2011, 6:00 AM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Atlanta radar (KFFC), 51 km from the middle of the area, began a volume at 01:13 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

50%

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 441Apr 15, 5:30 PM EDT
• Mesoscale Discussion 446Apr 15, 8:52 PM EDT
• Mesoscale Discussion 448Apr 15, 11:41 PM EDT
• Mesoscale Discussion 450Apr 16, 5:09 AM EDT

498 
WWUS20 KWNS 160112
SEL7
SPC WW 160112
GAZ000-161000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 147
NWS STORM PREDICTION CENTER NORMAN OK
915 PM EDT FRI APR 15 2011

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

       PARTS OF NORTHERN AND MUCH OF CENTRAL GEORGIA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 915 PM
UNTIL 600 AM 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 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF ATHENS
GEORGIA TO 50 MILES SOUTH OF MACON GEORGIA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU7).

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 145. WATCH NUMBER 145 WILL NOT BE IN EFFECT AFTER
915 PM EDT. CONTINUE...WW 142...WW 143...WW 144...WW 146...

DISCUSSION...ISOLATED SUPERCELLS WILL PERSIST IN GA FOR THE NEXT FEW
HOURS PER THE ENVIRONMENT DEPICTED BY THE 00Z FFC SOUNDING.  SURFACE
COOLING WITH NIGHTFALL WILL BE OFFSET SOMEWHAT BY A GRADUAL INCREASE
IN LOW-LEVEL MOISTURE FROM THE S/SW.  THUS...EXPECT THE THREAT FOR A
FEW TORNADOES...ALONG WITH DAMAGING WINDS AND LARGE HAIL...TO
CONTINUE WELL INTO THE OVERNIGHT HOURS AS THE MAIN CONVECTIVE BAND
PROGRESSES EWD FROM AL INTO GA.

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 25030.


...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.