Tornado Watch 248

Issued

Apr 28, 2011, 12:56 AM EDT (04:56 UTC)

Expired

Apr 28, 2011, 4:50 AM EDT

In force

4 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Greer radar (KGSP), 85 km from the middle of the area, began a volume at 05:00 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

70%

One or more EF2 to EF5 tornadoes

50%

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

90%

• Mesoscale Discussion 648Apr 28, 12:09 AM EDT
• Mesoscale Discussion 649Apr 28, 12:27 AM EDT
• Mesoscale Discussion 655Apr 28, 3:30 AM EDT

899 
WWUS20 KWNS 280457
SEL8
SPC WW 280457
GAZ000-NCZ000-SCZ000-281200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 248
NWS STORM PREDICTION CENTER NORMAN OK
100 AM EDT THU APR 28 2011

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

       GEORGIA
       WESTERN NORTH CAROLINA
       WESTERN AND CENTRAL SOUTH CAROLINA

EFFECTIVE THIS THURSDAY MORNING FROM 100 AM UNTIL 800 AM 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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF
HICKORY NORTH CAROLINA TO 55 MILES SOUTHEAST OF COLUMBUS GEORGIA.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 238...WW 239...WW
241...WW 242...WW 244...WW 245...WW 246...WW 247...

DISCUSSION...SUPERCELLS ONGOING FROM THE BLUE RIDGE TO NW OF MCN
WILL CONTINUE NEWD THROUGH A MOIST AND MODERATELY UNSTABLE AIR MASS
WITH MLCAPE OF 1000-2000 J/KG.  AREA VWPS AND RUC DIAGNOSTIC DATA
INDICATE A VERY STRONGLY SHEARED ENVIRONMENT WITH EFFECTIVE SRH
VALUES AS HIGH AS 500-700 M2/S2.  AS SUCH...ENVIRONMENT WILL REMAIN
QUITE SUPPORTIVE OF LONG-LIVED SUPERCELLS CAPABLE OF SIGNIFICANT
TORNADOES...LARGE HAIL AND DAMAGING WINDS.

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
500. MEAN STORM MOTION VECTOR 24045.


...MEAD

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