Alert archive / Virginia / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 346
The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2015, 4:09 PM EDT for 5 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2015, 4:09 PM EDT (20:09 UTC)
- Expired
- Jun 23, 2015, 11:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 134 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Allegany County, MD, 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, Dorchester County, 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, Somerset County, MD, Talbot County, MD, Washington County, MD, Wicomico County, MD, Worcester 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, Accomack County, VA, Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell 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 Radford, VA, City of Richmond, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Williamsburg, 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, Giles County, VA, Gloucester County, VA, Goochland County, VA, Greene County, VA, Hanover County, VA, Henrico County, VA, Highland County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Loudoun County, VA, Louisa County, VA, Madison County, VA, Mathews County, VA, Middlesex County, VA, Montgomery County, VA, Nelson County, VA, New Kent County, VA, Northampton County, VA, Northumberland 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, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mercer County, WV, Mineral County, WV, Monroe County, WV, Morgan County, WV, Pendleton County, WV, Summers County, WV
The radar
The Sterling radar (KLWX), 30 km from the middle of the area, began a volume at 20:09 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- 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
- 90%
Warnings issued inside it
35 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 36 min |
| Jun 23, 5:11 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 34 min |
| Jun 23, 5:18 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 27 min |
| Jun 23, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 38 min |
| Jun 23, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 38 min |
| Jun 23, 5:24 PM EDT | Flash Flood Warning | LWX | Allegany | 4 hr |
| Jun 23, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Howard, Montgomery | 33 min |
| Jun 23, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jun 23, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Jun 23, 5:40 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 10 min |
| Jun 23, 5:45 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 30 min |
| Jun 23, 5:45 PM EDT | Tornado Warning | LWX | Baltimore, Harford | 30 min |
| Jun 23, 5:48 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 4 hr |
| Jun 23, 5:51 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 39 min |
| Jun 23, 5:58 PM EDT | Tornado Warning | PHI | Burlington, Camden, Gloucester | 20 min |
| Jun 23, 6:01 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Frederick, Howard, Montgomery and 2 more | 29 min |
| Jun 23, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 77 min |
| Jun 23, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, City of Baltimore | 31 min |
| Jun 23, 6:27 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore | 48 min |
| Jun 23, 6:35 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 25 min |
| Jun 23, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 76 min |
| Jun 23, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fairfax, Fauquier, Loudoun, Page, Prince William and 4 more | 29 min |
| Jun 23, 7:05 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 4 hr |
| Jun 23, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 84 min |
| Jun 23, 7:14 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 46 min |
| Jun 23, 7:29 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Prince William | 31 min |
| Jun 23, 7:35 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 70 min |
| Jun 23, 7:41 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 65 min |
| Jun 23, 7:58 PM EDT | Severe Thunderstorm Warning | PHI | Cape May, Cumberland | 47 min |
| Jun 23, 8:00 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 30 min |
| Jun 23, 8:23 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 52 min |
| Jun 23, 8:30 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 60 min |
| Jun 23, 9:09 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 51 min |
| Jun 23, 9:15 PM EDT | Severe Thunderstorm Warning | AKQ | Caroline, Essex, Richmond, Westmoreland | 45 min |
| Jun 23, 9:29 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 46 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, 8.2 hours before the alert went out and 27 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
- 387 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 1544 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 121 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 |
|---|---|---|---|---|
| Jun 23, 1:45 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 3 hr |
| Jun 23, 5:47 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 88 min |
| Jun 23, 7:41 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 94 min |
| Jun 23, 10:28 AM EDT | Mesoscale Discussion | SPC | Garrett | 2 hr |
| Jun 23, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | Garrett | 7 hr |
| Jun 23, 3:25 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett | 95 min |
| Jun 23, 8:57 AM EDT | Mesoscale Discussion | SPC | Sussex | 63 min |
| Jun 23, 10:12 AM EDT | Severe Thunderstorm Watch | SPC | Bergen, Essex, Hudson, Passaic, Union | 6 hr |
| Jun 23, 10:20 AM EDT | Severe Thunderstorm Watch | SPC | Atlantic, Burlington, Camden, Gloucester, Hunterdon, Mercer and 7 more | 7 hr |
| Jun 23, 3:35 PM EDT | Severe Thunderstorm Watch | SPC | Bergen, Essex, Hudson, Passaic, Union | 6 hr |
Nearby
Severe Thunderstorm Watches in Virginia, 2015Severe Thunderstorm Watches in Maryland, 2015Severe Thunderstorm Watches in New Jersey, 2015Every severe thunderstorm watch in 2015
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.