Alert archive / Maryland / Severe Thunderstorm Warnings / 2018
Severe Thunderstorm Warnings in Maryland, August 2018
46 severe thunderstorm warnings in August 2018. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2018. Tap one for its archive.
- Severe Thunderstorm Warnings
- 46
- Busiest day
- August 21, 201810 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 10:19 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 56 min |
| Aug 1, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 47 min |
| Aug 1, 11:05 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 25 min |
| Aug 1, 11:35 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 20 min |
| Aug 2, 1:55 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 50 min |
| Aug 2, 3:03 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Prince George's | 42 min |
| Aug 2, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 35 min |
| Aug 3, 9:09 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 36 min |
| Aug 6, 12:40 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 36 min |
| Aug 6, 1:01 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 25 min |
| Aug 7, 3:55 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 30 min |
| Aug 7, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 39 min |
| Aug 7, 6:13 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 47 min |
| Aug 7, 6:53 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 37 min |
| Aug 7, 7:14 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 46 min |
| Aug 8, 8:05 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| Aug 8, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 47 min |
| Aug 8, 9:38 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 52 min |
| Aug 8, 10:00 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 45 min |
| Aug 8, 10:21 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 39 min |
| Aug 8, 10:46 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 32 min |
| Aug 11, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 29 min |
| Aug 11, 6:08 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 52 min |
| Aug 11, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 50 min |
| Aug 12, 4:27 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 48 min |
| Aug 12, 5:09 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 47 min |
| Aug 13, 4:22 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 38 min |
| Aug 13, 4:57 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 48 min |
| Aug 13, 5:22 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Howard | 38 min |
| Aug 13, 5:49 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 41 min |
| Aug 13, 6:20 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 55 min |
| Aug 13, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 50 min |
| Aug 17, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 51 min |
| Aug 17, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 65 min |
| Aug 18, 2:22 AM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 23 min |
| Aug 21, 2:33 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 27 min |
| Aug 21, 2:34 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 41 min |
| Aug 21, 3:00 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 45 min |
| Aug 21, 3:13 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 47 min |
| Aug 21, 3:43 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 47 min |
| Aug 21, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 34 min |
| Aug 21, 5:12 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 48 min |
| Aug 21, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 38 min |
| Aug 21, 6:09 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 51 min |
| Aug 21, 6:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 46 min |
| Aug 21, 8:25 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 50 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Washington County13
- Allegany County9
- Prince George's County8
- Baltimore County7
- Frederick County7
- Montgomery County6
- Charles County6
- Harford County5
- Anne Arundel County5
- Carroll County4
- Cecil County3
- Howard County3
- Calvert County2
- Queen Anne's County2
- Kent County1
- Caroline County1
- Talbot County1
- Saint Mary's County1
- City of Baltimore1
- Garrett County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.