Alert archive / North Carolina / Tornado Watches in 2004

Tornado Watch 753

August 14, 200427 counties in North Carolina; 7 counties in Virginia

The Storm Prediction Center issued this tornado watch at Aug 14, 2004, 11:30 AM EDT for 27 counties in North Carolina; 7 counties in Virginia. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Aug 14, 2004, 11:30 AM EDT (15:30 UTC)
Expired
Aug 14, 2004, 9:00 PM EDT
In force
10 hr
Issued by
the Storm Prediction Center
All 34 counties

Beaufort County, NC, Bertie County, NC, Brunswick County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Gates County, NC, Greene County, NC, Hertford County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC, City of Chesapeake, VA, City of Franklin, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA

The radar

The Morehead City radar (KMHX), 48 km from the middle of the area, began a volume at 15:32 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.

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 14, 12:31 PM EDTTornado WarningMHXOnslow29 min
Aug 14, 1:00 PM EDTTornado WarningMHXOnslow30 min
Aug 14, 1:15 PM EDTFlash Flood WarningMHXDuplin, Jones, Lenoir, Onslow2 hr
Aug 14, 2:38 PM EDTFlash Flood WarningMHXGreene, Pitt2 hr
Aug 14, 3:27 PM EDTTornado WarningMHXHyde33 min
Aug 14, 3:56 PM EDTTornado WarningMHXTyrrell34 min
Aug 14, 3:57 PM EDTFlash Flood WarningMHXMartin93 min
Aug 14, 5:54 PM EDTTornado WarningAKQCity of Chesapeake, City of Virginia Beach36 min
Aug 14, 6:51 PM EDTTornado WarningAKQCity of Virginia Beach14 min
Aug 14, 7:05 PM EDTTornado WarningAKQCity of Chesapeake15 min
Aug 14, 7:18 PM EDTTornado WarningAKQCity of Chesapeake17 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 3.5 hours before the alert went out and 47 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Newport, NC at 12:00Z on 2004-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1472 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 2004-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1472 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
627 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 141534
SEL3  
SPC WW 141530
NCZ000-VAZ000-CWZ000-150100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 753
NWS STORM PREDICTION CENTER NORMAN OK
1130 AM EDT SAT AUG 14 2004

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

       EASTERN NORTH CAROLINA
       SOUTHEAST VIRGINIA
       COASTAL WATERS

EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 1130 AM 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 ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES SOUTH OF WILMINGTON NORTH CAROLINA TO 30
MILES EAST NORTHEAST OF NORFOLK VIRGINIA.

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 752. WATCH NUMBER 752 WILL NOT BE IN EFFECT AFTER
1130 AM EDT. 

DISCUSSION...HURRICANE CHARLEY IS MOVING ONSHORE NEAR THE NC/SC
BORDER...AND WILL CONTINUE NNEWD ACROSS ERN NC TODAY /SEE LATEST NHC
ADVISORIES FOR ADDITIONAL DETAILS/.  WIDESPREAD CLOUDS/RAIN ARE
RESULTING IN RELATIVELY STABLE PROFILES ACROSS CENTRAL NC...WHEREAS
RICHER LOW-LEVEL MOISTURE AND MORE CELLULAR CONVECTIVE BANDS ARE
OVERSPREADING THE NC COASTAL PLAIN.  PRESENT INDICATIONS ARE THAT
THE MOST FAVORABLE COMBINATION OF LOW-LEVEL SHEAR AND INSTABILITY
FOR SUPERCELLS/TORNADOES WILL REMAIN OVER THE NC COASTAL PLAIN
THROUGH THE AFTERNOON TO THE NE OF THE CENTER OF CIRCULATION.  LATER
THIS AFTERNOON...THE THREAT FOR AN ISOLATED TORNADO OR TWO MAY ALSO
SPREAD NWD INTO SE VA.

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 18030.


...THOMPSON

335,0785 370,0764 370,0743 335,0765

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 14, 2:05 AM EDTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 10 more115 min
Aug 14, 3:30 AM EDTTornado WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 25 more10 hr
Aug 14, 8:37 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 40 more113 min
Aug 14, 2:34 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 14 more116 min
Aug 14, 6:28 PM EDTMesoscale DiscussionSPCCamden, Currituck, Dare, Pasquotank92 min

Nearby

Tornado Watches in North Carolina, 2004Tornado Watches in Virginia, 2004Every tornado watch in 2004

Sources

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.