Alert archive / Virginia / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 372
The Storm Prediction Center issued this severe thunderstorm watch at Jun 8, 2007, 5:32 PM EDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2007, 5:32 PM EDT (21:32 UTC)
- Expired
- Jun 8, 2007, 11:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 73 counties
Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Adams County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Union County, PA, York County, PA, Albemarle County, VA, Arlington County, VA, Augusta County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Harrisonburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, King George County, VA, Loudoun County, VA, Madison County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren 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
The radar
The Sterling radar (KLWX), 97 km from the middle of the area, began a volume at 21:34 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
39 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 5:37 PM EDT | Severe Thunderstorm Warning | LWX | Highland | 53 min |
| Jun 8, 5:46 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham | 44 min |
| Jun 8, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 42 min |
| Jun 8, 6:05 PM EDT | Severe Thunderstorm Warning | LWX | Grant | 40 min |
| Jun 8, 6:18 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Rockingham, City of Harrisonburg, City of Staunton, City of Waynesboro | 57 min |
| Jun 8, 6:30 PM EDT | Severe Thunderstorm Warning | LWX | Spotsylvania, City of Fredericksburg | 45 min |
| Jun 8, 6:36 PM EDT | Severe Thunderstorm Warning | LWX | Hardy | 54 min |
| Jun 8, 6:44 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 30 min |
| Jun 8, 6:48 PM EDT | Severe Thunderstorm Warning | LWX | Orange | 42 min |
| Jun 8, 6:53 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster | 46 min |
| Jun 8, 6:58 PM EDT | Severe Thunderstorm Warning | CTP | York | 62 min |
| Jun 8, 7:01 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 44 min |
| Jun 8, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | Shenandoah | 18 min |
| Jun 8, 7:12 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, City of Staunton, City of Waynesboro | 38 min |
| Jun 8, 7:21 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 39 min |
| Jun 8, 7:23 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 67 min |
| Jun 8, 7:27 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 48 min |
| Jun 8, 7:41 PM EDT | Severe Thunderstorm Warning | LWX | Spotsylvania | 49 min |
| Jun 8, 7:47 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 28 min |
| Jun 8, 7:47 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 32 min |
| Jun 8, 7:48 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Nelson, City of Charlottesville | 57 min |
| Jun 8, 7:54 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland | 66 min |
| Jun 8, 7:57 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 63 min |
| Jun 8, 7:57 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 63 min |
| Jun 8, 8:04 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 56 min |
| Jun 8, 8:11 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 64 min |
| Jun 8, 8:14 PM EDT | Severe Thunderstorm Warning | CTP | Snyder, Union | 61 min |
| Jun 8, 8:15 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 14 min |
| Jun 8, 8:18 PM EDT | Severe Thunderstorm Warning | LWX | Orange | 57 min |
| Jun 8, 8:32 PM EDT | Severe Thunderstorm Warning | CTP | Juniata | 28 min |
| Jun 8, 8:33 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, York | 72 min |
| Jun 8, 8:37 PM EDT | Severe Thunderstorm Warning | LWX | Carroll | 40 min |
| Jun 8, 8:42 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 63 min |
| Jun 8, 8:51 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 54 min |
| Jun 8, 9:11 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 55 min |
| Jun 8, 9:17 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 43 min |
| Jun 8, 9:23 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 41 min |
| Jun 8, 9:40 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 31 min |
| Jun 8, 9:50 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 30 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.5 hours before the alert went out and 101 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
- 709 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1315 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 4:12 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 7 more | 93 min |
| Jun 8, 7:48 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 4 more | 117 min |
| Jun 8, 12:37 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 8 hr |
| Jun 8, 2:08 PM EDT | Mesoscale Discussion | SPC | Armstrong, Butler, Cameron, Clarion, Clearfield, Crawford and 10 more | 97 min |
| Jun 8, 2:59 PM EDT | Severe Thunderstorm Watch | SPC | Armstrong, Bedford, Blair, Bradford, Butler, Cambria and 22 more | 7 hr |
| Jun 8, 3:06 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 54 min |
| Jun 8, 12:02 PM EDT | Mesoscale Discussion | SPC | Buchanan, Dickenson, Lee, Russell, Scott, Tazewell and 3 more | 58 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2007Severe Thunderstorm Watches in Pennsylvania, 2007Severe Thunderstorm Watches in Maryland, 2007Every severe thunderstorm watch in 2007
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.