Alert archive / Virginia / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 404
The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2014, 5:05 PM EDT for 5 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2014, 5:05 PM EDT (21:05 UTC)
- Expired
- Jul 8, 2014, 10:30 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 65 kt
All 82 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia 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 Fredericksburg, 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, 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
The radar
The Sterling radar (KLWX), 98 km from the middle of the area, began a volume at 21:05 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
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Rockingham, Shenandoah | 55 min |
| Jul 8, 5:09 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 51 min |
| Jul 8, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Highland, Rockingham, Shenandoah | 62 min |
| Jul 8, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Shenandoah, Warren, City of Winchester | 45 min |
| Jul 8, 5:49 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Loudoun, Prince William, Rappahannock, Warren | 41 min |
| Jul 8, 6:00 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery, Washington | 45 min |
| Jul 8, 6:23 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Howard, Montgomery, Prince George's | 52 min |
| Jul 8, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Columbia, Cumberland, Dauphin, Juniata, Lancaster and 7 more | 90 min |
| Jul 8, 6:39 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 2 more | 96 min |
| Jul 8, 6:59 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Howard, Montgomery, Prince George's | 91 min |
| Jul 8, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 72 min |
| Jul 8, 7:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 82 min |
| Jul 8, 7:19 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 116 min |
| Jul 8, 7:20 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 70 min |
| Jul 8, 7:47 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 58 min |
| Jul 8, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 106 min |
| Jul 8, 8:06 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 84 min |
| Jul 8, 8:21 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Cumberland, Gloucester, Salem | 69 min |
| Jul 8, 8:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 59 min |
| Jul 8, 8:38 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 25 min |
| Jul 8, 8:44 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 69 min |
| Jul 8, 8:54 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 51 min |
| Jul 8, 8:56 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 73 min |
| Jul 8, 9:12 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 63 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.1 hours before the alert went out and 42 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
- 132 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1646 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 4:42 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle | 63 min |
| Jul 8, 7:44 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle | 61 min |
| Jul 8, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett, Washington | 7 hr |
| Jul 8, 4:00 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 90 min |
| Jul 8, 5:39 PM EDT | Mesoscale Discussion | SPC | Bergen, Essex, Hudson, Morris, Passaic, Sussex | 66 min |
| Jul 8, 6:27 PM EDT | Severe Thunderstorm Watch | SPC | Bergen, Essex, Hudson, Passaic, Union | 6 hr |
| Jul 8, 8:58 AM EDT | Mesoscale Discussion | SPC | Mercer | 62 min |
| Jul 8, 11:29 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 37 more | 91 min |
| Jul 8, 4:02 PM EDT | Mesoscale Discussion | SPC | Buchanan, Dickenson, Lee, Russell, Scott, Washington and 3 more | 88 min |
Nearby
Severe Thunderstorm Watches in Virginia, 2014Severe Thunderstorm Watches in Maryland, 2014Severe Thunderstorm Watches in New Jersey, 2014Every severe thunderstorm watch in 2014
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.