Tornado Watch 250

Issued

Apr 28, 2011, 4:30 AM EDT (08:30 UTC)

Expired

Apr 28, 2011, 2:00 PM EDT

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Columbia radar (KCAE), 20 km from the middle of the area, began a volume at 08:30 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

30%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 655Apr 28, 3:30 AM EDT
• Mesoscale Discussion 659Apr 28, 8:05 AM EDT
• Mesoscale Discussion 661Apr 28, 11:22 AM EDT

271 
WWUS20 KWNS 280831
SEL0
SPC WW 280831
GAZ000-NCZ000-SCZ000-281600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 250
NWS STORM PREDICTION CENTER NORMAN OK
430 AM EDT THU APR 28 2011

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

       CENTRAL AND EAST CENTRAL GEORGIA
       CENTRAL NORTH CAROLINA
       CENTRAL AND PARTS OF EASTERN SOUTH CAROLINA

EFFECTIVE THIS THURSDAY MORNING FROM 430 AM UNTIL NOON 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 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES WEST SOUTHWEST OF
VIDALIA GEORGIA TO 10 MILES NORTHWEST OF ROANOKE RAPIDS 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 248. WATCH NUMBER 248 WILL NOT BE IN EFFECT AFTER
430 AM EDT. CONTINUE...WW 246...WW 247...WW 249...

DISCUSSION...BROKEN PRE-FRONTAL CONVECTIVE BAND WILL CONTINUE TO
MOVE EWD THROUGH THE MORNING AS INDIVIDUAL CELLS MOVE QUICKLY NEWD
ALONG THE LINE.  AN INFLUX OF NEAR 70 F SURFACE DEWPOINTS WILL
RESULT IN SUFFICIENT INSTABILITY TO MAINTAIN THE STORMS THROUGH THE
MORNING...WHILE DEEP-LAYER AND LOW-LEVEL SHEAR WILL REMAIN FAVORABLE
FOR EMBEDDED SUPERCELLS/BOWS CAPABLE OF PRODUCING DAMAGING WINDS AND
A FEW TORNADOES.

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
500. MEAN STORM MOTION VECTOR 24035.


...THOMPSON

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.