Tornado Watch 4

Issued

Jan 21, 2012, 11:28 AM CST (17:28 UTC)

Expired

Jan 21, 2012, 7:00 PM CST

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Robins AFB radar (KJGX), 65 km from the middle of the area, began a volume at 17:32 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

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 42Jan 21, 10:01 AM CST
• Mesoscale Discussion 43Jan 21, 1:57 PM CST
• Mesoscale Discussion 44Jan 21, 4:48 PM CST

782 
WWUS20 KWNS 211731
SEL4
SPC WW 211731
ALZ000-GAZ000-SCZ000-220100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 4
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM EST SAT JAN 21 2012

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

       EASTERN ALABAMA
       GEORGIA
       WESTERN AND CENTRAL SOUTH CAROLINA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
800 PM EST.

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 75 STATUTE
MILES EITHER SIDE OF A LINE FROM 30 MILES SOUTHWEST OF AUBURN
ALABAMA TO 25 MILES NORTH NORTHEAST OF ORANGEBURG SOUTH CAROLINA.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 3...

DISCUSSION...QLCS WITH EMBEDDED BOWING AND SUPERCELL STRUCTURES IS
EXPECTED TO PERSIST AHEAD OF COLD FRONT...AND IN THE WAKE OF WEDGE
FRONT PASSAGE TODAY.  40-50 KT SWLY LLJ WILL CONTINUE TO ENHANCE
MOISTURE ADVECTION ACROSS GA INTO SC...SUPPORTING AIR MASS
DESTABILIZATION IN THESE AREAS.  WHEN COUPLED WITH 40-55 KT OF
DEEP...WLY SHEAR AND 0-1 KM SRH OF 250-400 M2/S2...SETUP WILL REMAIN
FAVORABLE FOR A FEW TORNADOES AND DAMAGING WINDS AS STORMS
MOVE/DEVELOP EWD/SEWD ACROSS THE WATCH AREA.

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 400.
MEAN STORM MOTION VECTOR 25040.


...MEAD

Tornado Watches in Georgia, 2012Tornado Watches in South Carolina, 2012Tornado Watches in Alabama, 2012Every tornado watch in 2012

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.