Alert archive / Virginia / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 635
The Storm Prediction Center issued this severe thunderstorm watch at Jul 14, 2004, 7:00 PM EDT for 28 counties in North Carolina; 46 counties in Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 14, 2004, 7:00 PM EDT (23:00 UTC)
- Expired
- Jul 15, 2004, 12:00 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 74 counties
Alamance County, NC, Bertie County, NC, Camden County, NC, Chatham County, NC, Chowan County, NC, Currituck County, NC, Dare County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Halifax County, NC, Hertford County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Orange County, NC, Pasquotank County, NC, Perquimans County, NC, Person County, NC, Pitt County, NC, Tyrrell County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wilson County, NC, Accomack County, VA, Amelia County, VA, Brunswick County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Dinwiddie County, VA, Gloucester County, VA, Goochland County, VA, Greensville County, VA, Hanover County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Lunenburg County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA
The radar
The Norfolk radar (KAKQ), 65 km from the middle of the area, began a volume at 23:01 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 7:08 PM EDT | Severe Thunderstorm Warning | AKQ | Brunswick, Mecklenburg | 37 min |
| Jul 14, 7:11 PM EDT | Severe Thunderstorm Warning | RAH | Person | 34 min |
| Jul 14, 7:17 PM EDT | Severe Thunderstorm Warning | AKQ | King and Queen, Lancaster, Middlesex | 28 min |
| Jul 14, 8:09 PM EDT | Severe Thunderstorm Warning | AKQ | Southampton | 21 min |
| Jul 14, 8:21 PM EDT | Severe Thunderstorm Warning | RAH | Halifax | 39 min |
| Jul 14, 9:11 PM EDT | Severe Thunderstorm Warning | AKQ | York, City of Hampton, City of Poquoson | 19 min |
| Jul 14, 9:26 PM EDT | Severe Thunderstorm Warning | AKQ | Isle of Wight, City of Newport News | 19 min |
| Jul 14, 9:45 PM EDT | Severe Thunderstorm Warning | AKQ | York, City of Poquoson | 30 min |
| Jul 14, 10:03 PM EDT | Severe Thunderstorm Warning | RAH | Wake | 27 min |
| Jul 14, 10:25 PM EDT | Severe Thunderstorm Warning | AKQ | City of Virginia Beach | 35 min |
| Jul 14, 10:57 PM EDT | Severe Thunderstorm Warning | RAH | Wilson | 33 min |
| Jul 14, 10:59 PM EDT | Severe Thunderstorm Warning | RAH | Johnston, Wilson | 31 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
Roanoke, VA (KRNK), launched 12:00Z, 11.0 hours before the alert went out and 209 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
- 635 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1181 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 9:20 PM EDT | Severe Thunderstorm Watch | SPC | Cherokee, Clay, Graham | 6 hr |
| Jul 13, 11:21 PM EDT | Mesoscale Discussion | SPC | Cherokee, Graham | 114 min |
| Jul 14, 8:35 AM EDT | Mesoscale Discussion | SPC | Avery, Buncombe, Burke, Cleveland, Graham, Haywood and 11 more | 85 min |
| Jul 14, 10:40 AM EDT | Severe Thunderstorm Watch | SPC | Buncombe, Cleveland, Henderson, Jackson, McDowell, Mitchell and 4 more | 6 hr |
| Jul 14, 12:18 PM EDT | Mesoscale Discussion | SPC | Alleghany, Caswell, Rockingham, Stokes, Surry | 117 min |
| Jul 14, 1:03 PM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham, Macon, Swain | 117 min |
| Jul 14, 6:10 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Edgecombe, Franklin, Gates and 11 more | 65 min |
| Jul 14, 12:50 PM EDT | Tornado Watch | SPC | Accomack, Albemarle, Amelia, Appomattox, Arlington, Brunswick and 76 more | 6 hr |
| Jul 14, 3:05 PM EDT | Mesoscale Discussion | SPC | Accomack, Albemarle, Amelia, Appomattox, Arlington, Brunswick and 76 more | 115 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2004Severe Thunderstorm Watches in North Carolina, 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.