Alert archive / Virginia / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 578
The Storm Prediction Center issued this severe thunderstorm watch at Aug 5, 2002, 2:50 PM EDT for 17 counties in Maryland; 65 counties in Virginia; 9 counties in West Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2002, 2:50 PM EDT (18:50 UTC)
- Expired
- Aug 5, 2002, 8:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 91 counties
Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Garrett County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Botetourt County, VA, Buckingham County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Richmond, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Frederick County, VA, Goochland County, VA, Greene County, VA, Hanover County, VA, Henrico County, VA, Highland County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Loudoun County, VA, Louisa County, VA, Madison County, VA, Nelson County, VA, New Kent County, VA, Orange County, VA, Page County, VA, Powhatan County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV, Tucker County, WV
The radar
The Sterling radar (KLWX), 118 km from the middle of the area, began a volume at 18:50 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 5, 3:22 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 38 min |
| Aug 5, 3:56 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 64 min |
| Aug 5, 4:11 PM EDT | Severe Thunderstorm Warning | LWX | Howard | 49 min |
| Aug 5, 4:21 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Rappahannock, Warren | 39 min |
| Aug 5, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 56 min |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.8 hours before the alert went out and 247 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
- 80 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 104 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 5, 2:05 PM EDT | Severe Thunderstorm Watch | SPC | Barbour, Braxton, Brooke, Cabell, Calhoun, Clay and 23 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Virginia, 2002Severe Thunderstorm Watches in Maryland, 2002Severe Thunderstorm Watches in West Virginia, 2002Every severe thunderstorm watch in 2002
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.