Alert archive / North Carolina / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 773
The Storm Prediction Center issued this severe thunderstorm watch at Aug 21, 2004, 1:55 PM EDT for 31 counties in North Carolina; 17 counties in Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2004, 1:55 PM EDT (17:55 UTC)
- Expired
- Aug 21, 2004, 8:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Beaufort County, NC, Bertie County, NC, Bladen 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, Edgecombe County, NC, Gates County, NC, Greene County, NC, Hertford County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Sampson County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Accomack County, VA, City of Chesapeake, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Gloucester County, VA, Isle of Wight County, VA, Mathews County, VA, Northampton County, VA, Southampton County, VA, York County, VA
The radar
The Morehead City radar (KMHX), 109 km from the middle of the area, began a volume at 17:55 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:08 PM EDT | Severe Thunderstorm Warning | AKQ | Gloucester | 32 min |
| Aug 21, 2:17 PM EDT | Severe Thunderstorm Warning | MHX | Hyde | 43 min |
| Aug 21, 3:02 PM EDT | Severe Thunderstorm Warning | MHX | Dare | 43 min |
| Aug 21, 3:11 PM EDT | Severe Thunderstorm Warning | MHX | Beaufort, Craven | 64 min |
| Aug 21, 5:14 PM EDT | Severe Thunderstorm Warning | MHX | Pitt | 46 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, 5.9 hours before the alert went out and 109 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.
- Mixed-layer CAPE
- 1973 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 762 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 1:24 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 23 more | 2 hr |
| Aug 21, 2:20 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Burke, Cabarrus, Caswell, Catawba and 22 more | 115 min |
Nearby
Severe Thunderstorm Watches in North Carolina, 2004Severe Thunderstorm Watches in Virginia, 2004Every severe thunderstorm 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.