Alert archive / North Carolina / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 727

July 11, 200328 counties in North Carolina; 7 counties in South Carolina; 7 counties in Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jul 11, 2003, 7:05 PM EDT for 28 counties in North Carolina; 7 counties in South Carolina; 7 counties in Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 11, 2003, 7:05 PM EDT (23:05 UTC)
Expired
Jul 12, 2003, 1:00 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 42 counties

Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Chowan County, NC, Columbus County, NC, Craven County, NC, Currituck County, NC, Duplin County, NC, Edgecombe County, NC, Gates County, NC, Greene County, NC, Hertford County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Onslow County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Clarendon County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC, 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 Raleigh/Durham radar (KRAX), 93 km from the middle of the area, began a volume at 23:05 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

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

IssuedProductOfficeCountiesLasted
Jul 11, 7:28 PM EDTSevere Thunderstorm WarningMHXPitt47 min
Jul 11, 7:31 PM EDTSevere Thunderstorm WarningAKQIsle of Wight, Southampton, City of Franklin29 min
Jul 11, 7:32 PM EDTSevere Thunderstorm WarningMHXGreene43 min
Jul 11, 7:39 PM EDTSevere Thunderstorm WarningILMDillon, Marion66 min
Jul 11, 7:52 PM EDTSevere Thunderstorm WarningRAHEdgecombe23 min
Jul 11, 7:52 PM EDTSevere Thunderstorm WarningILMWilliamsburg53 min
Jul 11, 8:25 PM EDTSevere Thunderstorm WarningILMGeorgetown65 min
Jul 11, 8:28 PM EDTSevere Thunderstorm WarningILMHorry62 min
Jul 11, 8:45 PM EDTSevere Thunderstorm WarningAKQHertford30 min
Jul 11, 8:48 PM EDTSevere Thunderstorm WarningILMBladen57 min
Jul 11, 9:08 PM EDTSevere Thunderstorm WarningILMColumbus52 min
Jul 11, 9:11 PM EDTSevere Thunderstorm WarningRAHSampson49 min
Jul 11, 9:13 PM EDTSevere Thunderstorm WarningILMPender62 min
Jul 11, 9:16 PM EDTSevere Thunderstorm WarningMHXBeaufort44 min
Jul 11, 9:18 PM EDTSevere Thunderstorm WarningRAHWayne12 min
Jul 11, 9:24 PM EDTSevere Thunderstorm WarningMHXDuplin51 min
Jul 11, 9:26 PM EDTSevere Thunderstorm WarningMHXGreene34 min
Jul 11, 9:46 PM EDTSevere Thunderstorm WarningMHXPitt44 min
Jul 11, 10:16 PM EDTSevere Thunderstorm WarningMHXJones, Lenoir44 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, 11.1 hours before the alert went out and 131 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 2003-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1617 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 2003-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.193958Sfc1 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
1617 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
788 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.8
Supercell composite
7.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 9:29 PM EDTMesoscale DiscussionSPCAlleghany, Ashe, Avery, Buncombe, Haywood, Jackson and 5 more31 min
Jul 11, 12:45 PM EDTMesoscale DiscussionSPCAnson, Beaufort, Bertie, Bladen, Camden, Chatham and 41 more2 hr
Jul 11, 1:55 PM EDTSevere Thunderstorm WatchSPCAnson, Scotland, Union6 hr
Jul 11, 4:10 PM EDTSevere Thunderstorm WatchSPCAlamance, Anson, Bertie, Cabarrus, Camden, Caswell and 44 more4 hr
Jul 11, 4:49 PM EDTMesoscale DiscussionSPCScotland116 min
Jul 11, 6:34 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 42 more86 min
Jul 10, 10:37 PM EDTMesoscale DiscussionSPCAlbemarle, Amherst, Appomattox, Arlington, Bedford, Buckingham and 33 more83 min

Nearby

Severe Thunderstorm Watches in North Carolina, 2003Severe Thunderstorm Watches in South Carolina, 2003Severe Thunderstorm Watches in Virginia, 2003Every severe thunderstorm watch in 2003

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.