Tornado Watch 840

Issued

Sep 5, 2011, 3:42 PM EDT (19:42 UTC)

Expired

Sep 5, 2011, 11:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Atlanta radar (KFFC), 90 km from the middle of the area, began a volume at 19:42 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

30%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 2131Sep 5, 12:01 PM EDT
• Mesoscale Discussion 2132Sep 5, 1:23 PM EDT
• Mesoscale Discussion 2133Sep 5, 3:05 PM EDT
• Mesoscale Discussion 2138Sep 5, 7:37 PM EDT
• Mesoscale Discussion 2139Sep 5, 8:36 PM EDT

691 
WWUS20 KWNS 051942
SEL0
SPC WW 051942
GAZ000-NCZ000-SCZ000-060300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 840
NWS STORM PREDICTION CENTER NORMAN OK
345 PM EDT MON SEP 5 2011

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

       NORTHERN AND CENTRAL GEORGIA
       WESTERN NORTH CAROLINA
       WESTERN SOUTH CAROLINA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1100 PM EDT.

TORNADOES...HAIL TO 1 INCH 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 15 MILES SOUTH OF COLUMBUS
GEORGIA TO 20 MILES NORTH NORTHEAST OF HICKORY NORTH CAROLINA.
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 TORNADO
WATCH NUMBER 839. WATCH NUMBER 839 WILL NOT BE IN EFFECT AFTER
345 PM EDT. CONTINUE...WW 838...

DISCUSSION...TSTMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY THIS AFTERNOON INTO EVENING IN ADVANCE OF DEEP-LAYER
CYCLONE SLOWLY LIFTING NEWD THROUGH AL.  THE COMBINATION OF A
MOIST/LCL AIR MASS AND STRENGTHENING LOW- AND DEEP-LAYER SHEAR WILL
RESULT IN AN ENVIRONMENT SUPPORTIVE OF SUPERCELLS AND BOWING
STRUCTURES CAPABLE OF TORNADOES AND DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 21030.


...MEAD

Tornado Watches in Georgia, 2011Tornado Watches in South Carolina, 2011Tornado Watches in North Carolina, 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.