Tornado Watch 149

Issued

Apr 15, 2007, 12:42 PM EDT (16:42 UTC)

Expired

Apr 15, 2007, 8:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Raleigh/Durham radar (KRAX), 99 km from the middle of the area, began a volume at 16:46 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 503Apr 15, 11:15 AM EDT
• Mesoscale Discussion 504Apr 15, 12:19 PM EDT
• Mesoscale Discussion 509Apr 15, 4:12 PM EDT

000
WWUS20 KWNS 151641
SEL9  
SPC WW 151641
NCZ000-VAZ000-CWZ000-160000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 149
NWS STORM PREDICTION CENTER NORMAN OK
1240 PM EDT SUN APR 15 2007

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

       NORTHERN AND CENTRAL NORTH CAROLINA
       SOUTHEAST VIRGINIA
       COASTAL WATERS

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1240 PM UNTIL
800 PM 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 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES EAST OF NORFOLK
VIRGINIA TO 20 MILES SOUTH OF HICKORY NORTH CAROLINA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU9).

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 147...WW 148...

DISCUSSION...LINE OF THUNDERSTORMS OVER CENTRAL NC WILL TRACK
EASTWARD TOWARD THE COAST EARLY THIS AFTERNOON...WHILE NEW STORMS
INTENSIFY OVER WESTERN NC.  THESE STORMS WILL SPREAD NORTHEASTWARD
ALONG AND SOUTH OF WARM FRONT ACROSS NORTHERN NC AND SOUTHEAST VA. 
PRIMARY RISK SHOULD BE DAMAGING WINDS AND HAIL DUE TO STEEPENING MID
LEVEL LAPSE RATES AND STRONG DEEP LAYER SHEAR.  HOWEVER...PROXIMITY
TO RAPIDLY DEEPENING SURFACE LOW AND INCREASING DEWPOINT VALUES MAY
BE SUFFICIENT TO OFFSET VEERING LOW LEVEL WINDS TO LOCALLY ENHANCE
TORNADO RISK AS WELL.

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 24040.


...HART

Tornado Watches in North Carolina, 2007Tornado Watches in Virginia, 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.