Alert archive / Virginia / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 137, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 14, 2017, 2:16 PM EDT for Frederick County, City of Winchester, Virginia; Hampshire County, West Virginia. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2017, 2:16 PM EDT (18:16 UTC)
- Expired
- Jul 14, 2017, 2:44 PM EDT
- In force
- 28 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties City of Winchester, VA, Frederick County, VA, Hampshire County, WV
The radar
The Sterling radar (KLWX), 80 km from the middle of the area, began a volume at 18:19 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 14, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 88 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
- 403 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 14, 1:51 PM EDT, 25 minutes earlier.
Area forecast discussion, Jul 14, 1:51 PM EDT, 25 minutes before
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</html>Hazardous weather outlook, Jul 14, 1:50 PM EDT, 26 minutes before
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 150 PM EDT Fri Jul 14 2017 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-151000- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 150 PM EDT Fri Jul 14 2017 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch 414 is in effect until 9 PM this evening for the entire outlook area. A Heat Advisory is in effect until 7 PM for the Washington DC and Baltimore Metropolitan Areas. Scattered incidents of flooding are also possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible this afternoon. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-151000- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 150 PM EDT Fri Jul 14 2017 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch 414 is in effect until 9 PM for most of Maryland, central and northern Virginia, and the eastern West Virginia panhandle. A Heat Advisory is in effect until 7 PM for the Washington DC and Baltimore Metropolitan Areas. Scattered incidents of flooding are also possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible this afternoon.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 11:37 PM EDT | Special Marine Warning | LWX | 83 min | |
| Jul 14, 12:54 AM EDT | Special Marine Warning | LWX | 96 min | |
| Jul 14, 12:12 PM EDT | Heat Advisory | LWX | Arlington, Fairfax, Spotsylvania, Stafford, City of Alexandria, City of Fairfax and 2 more | 6 hr |
| Jul 14, 2:03 PM EDT | Special Marine Warning | LWX | 87 min | |
| Jul 14, 2:52 PM EDT | Special Marine Warning | LWX | 113 min | |
| Jul 14, 3:17 PM EDT | Special Marine Warning | LWX | 88 min | |
| Jul 14, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun, Prince William, Warren | 39 min |
| Jul 14, 3:33 PM EDT | Special Marine Warning | LWX | 117 min | |
| Jul 14, 3:47 PM EDT | Special Marine Warning | LWX | 118 min | |
| Jul 14, 4:02 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Augusta, Greene, Rockingham | 26 min |
| Jul 14, 4:14 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Loudoun, City of Fairfax, City of Falls Church | 27 min |
| Jul 14, 4:24 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, City of Alexandria, City of Falls Church | 51 min |
| Jul 14, 5:01 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jul 14, 5:07 PM EDT | Special Marine Warning | LWX | 113 min | |
| Jul 14, 5:19 PM EDT | Special Marine Warning | LWX | 86 min | |
| Jul 14, 5:40 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Jul 14, 6:06 PM EDT | Special Marine Warning | LWX | 84 min | |
| Jul 14, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | King George | 19 min |
| Jul 14, 6:33 PM EDT | Special Marine Warning | LWX | 117 min | |
| Jul 14, 7:24 PM EDT | Special Marine Warning | LWX | 66 min | |
| Jul 14, 1:35 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 40 min |
| Jul 14, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 39 min |
| Jul 14, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 24 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2017Severe Thunderstorm Warnings in West Virginia, 2017Every severe thunderstorm warning in 2017
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.