Tornado Watch 147

Issued

Apr 15, 2007, 8:08 AM EDT (12:08 UTC)

Expired

Apr 15, 2007, 3:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Columbia radar (KCAE), 116 km from the middle of the area, began a volume at 12:11 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

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 500Apr 15, 7:39 AM EDT
• Mesoscale Discussion 502Apr 15, 10:20 AM EDT
• Mesoscale Discussion 503Apr 15, 11:15 AM EDT
• Mesoscale Discussion 507Apr 15, 2:40 PM EDT

000
WWUS20 KWNS 151210
SEL7  
SPC WW 151210
NCZ000-SCZ000-CWZ000-151900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 147
NWS STORM PREDICTION CENTER NORMAN OK
810 AM EDT SUN APR 15 2007

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

       EASTERN NORTH CAROLINA
       EASTERN SOUTH CAROLINA
       COASTAL WATERS

EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 810 AM UNTIL 300
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 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTH SOUTHWEST OF
ORANGEBURG SOUTH CAROLINA TO 55 MILES NORTH OF NEW BERN NORTH
CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 145...WW 146...

DISCUSSION...BROKEN PRE-FRONTAL BAND OF THUNDERSTORMS WILL CONTINUE
TO SPREAD EWD/NEWD ACROSS SC/NC THROUGH MIDDAY AS A SURFACE LOW
DEEPENS AND MOVES NEWD FROM THE PIEDMONT...AND A COLD FRONT SWEEPS
EWD ACROSS GA/SC.  THOUGH INSTABILITY REMAINS RATHER WEAK IN THE
WARM SECTOR...BOUNDARY LAYER DEWPOINTS IN THE MID-UPPER 60S AND
STRONG VERTICAL SHEAR PROFILES WILL BE FAVORABLE FOR SUPERCELLS AND
AN ASSOCIATED TORNADO THREAT WITHIN THE LARGER CONVECTIVE BAND. 
INITIALLY...THE TORNADO THREAT WILL BE FOCUSED IN SC...WITH AN
INCREASING THREAT EXPECTED BY MID-LATE MORNING ACROSS ERN NC.

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 450.
MEAN STORM MOTION VECTOR 24045.


...THOMPSON

Tornado Watches in North Carolina, 2007Tornado Watches in South Carolina, 2007Every tornado watch in 2007

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.