Alert archive / Virginia / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 673
The Storm Prediction Center issued this severe thunderstorm watch at Aug 4, 1997, 12:45 PM EDT for 4 counties in Maryland; 78 counties in Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 1997, 12:45 PM EDT (16:45 UTC)
- Expired
- Aug 4, 1997, 7:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 82 counties
Saint Mary's County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Accomack County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Brunswick County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Carroll County, VA, Charles City County, VA, Charlotte County, VA, Chesterfield County, VA, City of Charlottesville, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Fredericksburg, VA, City of Galax, VA, City of Hampton, VA, City of Hopewell, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Radford, VA, City of Richmond, VA, City of Roanoke, VA, City of Salem, VA, City of Suffolk, VA, City of Williamsburg, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Gloucester County, VA, Goochland County, VA, Grayson County, VA, Greensville County, VA, Halifax County, VA, Hanover County, VA, Henrico County, VA, Henry County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Louisa County, VA, Lunenburg County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, Montgomery County, VA, Nelson County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Orange County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Richmond County, VA, Southampton County, VA, Spotsylvania County, VA, Surry County, VA, Sussex County, VA, Westmoreland County, VA, York County, VA
The radar
The Norfolk radar (KAKQ), 102 km from the middle of the area, began a volume at 16:47 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 1:19 PM EDT | Severe Thunderstorm Warning | AKQ | Hanover | 31 min |
| Aug 4, 1:41 PM EDT | Severe Thunderstorm Warning | RNK | Campbell | 34 min |
| Aug 4, 1:47 PM EDT | Severe Thunderstorm Warning | AKQ | Hanover, King William | 48 min |
| Aug 4, 2:00 PM EDT | Severe Thunderstorm Warning | AKQ | Prince Edward | 35 min |
| Aug 4, 2:31 PM EDT | Severe Thunderstorm Warning | AKQ | Essex, Richmond | 34 min |
| Aug 4, 2:53 PM EDT | Severe Thunderstorm Warning | AKQ | Lancaster | 47 min |
| Aug 4, 3:13 PM EDT | Severe Thunderstorm Warning | AKQ | Charles City, James City | 32 min |
| Aug 4, 4:07 PM EDT | Severe Thunderstorm Warning | AKQ | Accomack, Northampton | 48 min |
| Aug 4, 4:15 PM EDT | Severe Thunderstorm Warning | AKQ | Northampton | 50 min |
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 4.8 hours before the alert went out and 126 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
- 538 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 743 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | City of Danville | 6 hr |
Nearby
Severe Thunderstorm Watches in Virginia, 1997Severe Thunderstorm Watches in Maryland, 1997Every severe thunderstorm watch in 1997
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.