Alert archive / Maryland / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 4, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 20, 2015, 7:16 PM EDT for Frederick County, Virginia; Allegany County, Washington County, Maryland; Hampshire County, Morgan County, West Virginia. It was in force for 59 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
- Apr 20, 2015, 7:16 PM EDT (23:16 UTC)
- Expired
- Apr 20, 2015, 8:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Allegany County, MD, Washington County, MD, Frederick County, VA, Hampshire County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 90 km from the middle of the area, began a volume at 23:15 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 |
|---|---|---|---|
| Apr 20, 3:08 PM EDT | Tornado Watch | SPC | 9 hr |
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 1:17 AM EDT | Coastal Flood Advisory | LWX | Arlington, City of Alexandria, City of Falls Church | 12 hr |
| Apr 20, 1:57 AM EDT | Gale Warning | LWX | 5 hr | |
| Apr 20, 1:57 AM EDT | Small Craft Advisory | LWX | 44 hr | |
| Apr 20, 4:28 AM EDT | Small Craft Advisory | LWX | 42 hr | |
| Apr 20, 6:44 AM EDT | Areal Flood Warning | LWX | Culpeper, Madison | 8 hr |
| Apr 20, 10:52 AM EDT | River Flood Warning | LWX | Culpeper, Fauquier | 20 hr |
| Apr 20, 11:10 AM EDT | Areal Flood Warning | LWX | Culpeper | 6 hr |
| Apr 20, 4:57 PM EDT | Special Marine Warning | LWX | 33 min | |
| Apr 20, 5:17 PM EDT | Special Marine Warning | LWX | 43 min | |
| Apr 20, 5:23 PM EDT | Special Marine Warning | LWX | 37 min | |
| Apr 20, 5:57 PM EDT | Special Marine Warning | LWX | 63 min | |
| Apr 20, 6:24 PM EDT | Special Marine Warning | LWX | 66 min | |
| Apr 20, 6:56 PM EDT | Special Marine Warning | LWX | 94 min | |
| Apr 20, 7:08 PM EDT | Special Marine Warning | LWX | 82 min | |
| Apr 20, 7:32 PM EDT | Special Marine Warning | LWX | 88 min | |
| Apr 20, 7:42 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Prince William, Stafford, City of Alexandria, City of Fairfax and 1 more | 48 min |
| Apr 20, 7:01 AM EDT | Areal Flood Warning | LWX | Saint Mary's | 9 hr |
| Apr 20, 3:16 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, City of Baltimore | 7 hr |
| Apr 20, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 23 min |
| Apr 20, 6:59 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 31 min |
| Apr 20, 7:09 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 36 min |
| Apr 20, 7:20 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 25 min |
| Apr 20, 7:51 PM EDT | Severe Thunderstorm Warning | LWX | Grant, Mineral | 24 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2015Severe Thunderstorm Warnings in West Virginia, 2015Severe Thunderstorm Warnings in Virginia, 2015Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.