Tornado Watch 848

Issued

Sep 6, 2011, 1:32 PM EDT (17:32 UTC)

Expired

Sep 6, 2011, 9:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Raleigh/Durham radar (KRAX), 47 km from the middle of the area, began a volume at 17:35 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 2144Sep 6, 12:41 PM EDT
• Mesoscale Discussion 2145Sep 6, 4:41 PM EDT
• Mesoscale Discussion 2146Sep 6, 7:33 PM EDT

942 
WWUS20 KWNS 061734
SEL8
SPC WW 061734
NCZ000-SCZ000-VAZ000-CWZ000-070100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 848
NWS STORM PREDICTION CENTER NORMAN OK
135 PM EDT TUE SEP 6 2011

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

       CENTRAL AND EASTERN NORTH CAROLINA
       EASTERN SOUTH CAROLINA
       SOUTHEAST VIRGINIA
       COASTAL WATERS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL
900 PM EDT.

TORNADOES...HAIL TO 0.5 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 45 MILES WEST NORTHWEST OF
ROANOKE RAPIDS NORTH CAROLINA TO 15 MILES SOUTH SOUTHEAST OF
MYRTLE BEACH SOUTH CAROLINA.  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 845...WW 846...WW 847...

DISCUSSION...MULTIPLE BANDS/CLUSTERS OF TSTMS WILL PERSIST THIS
AFTERNOON WITHIN A VERY MOIST AND MODERATELY UNSTABLE AIR MASS WITH
MLCAPE VALUES OF 1000-2000 J/KG.  WATCH AREA WILL RESIDE ALONG ERN
PERIPHERY OF STRONGER MID- AND HIGH-LEVEL WIND FIELD ATTENDANT TO
SRN APPALACHIANS UPPER SYSTEM.  WHEN COUPLED WITH 30-40 KT LOW-LEVEL
SLY FLOW...SUFFICIENT VERTICAL SHEAR EXISTS TO SUPPORT SUPERCELLS
AND BOWING STRUCTURES CAPABLE OF DAMAGING WINDS AND A FEW TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 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 North Carolina, 2011Tornado Watches in Virginia, 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.