Alert archive / Maryland / Severe Thunderstorm Warnings / 2018
Severe Thunderstorm Warnings in Maryland, May 2018
57 severe thunderstorm warnings in May 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 May 2018. Tap one for its archive.
- Severe Thunderstorm Warnings
- 57
- Busiest day
- May 13, 201812 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 |
|---|---|---|---|---|
| May 10, 2:32 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 43 min |
| May 10, 3:53 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 37 min |
| May 10, 4:18 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 42 min |
| May 10, 5:17 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard, City of Baltimore | 43 min |
| May 10, 5:45 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 60 min |
| May 10, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 23 min |
| May 10, 6:51 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 39 min |
| May 12, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford | 65 min |
| May 12, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 44 min |
| May 12, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 50 min |
| May 12, 7:44 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, City of Baltimore | 46 min |
| May 12, 7:45 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 45 min |
| May 12, 7:46 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 22 min |
| May 12, 8:02 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 43 min |
| May 12, 8:11 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 49 min |
| May 12, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 62 min |
| May 12, 8:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 50 min |
| May 12, 8:47 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 88 min |
| May 12, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 39 min |
| May 12, 9:16 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Wicomico | 59 min |
| May 12, 9:27 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 63 min |
| May 13, 12:46 AM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Worcester | 29 min |
| May 13, 6:05 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 55 min |
| May 13, 6:50 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 40 min |
| May 13, 7:22 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 25 min |
| May 13, 10:12 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 48 min |
| May 13, 10:21 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 39 min |
| May 13, 11:19 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 26 min |
| May 14, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 48 min |
| May 14, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 41 min |
| May 14, 4:51 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 39 min |
| May 14, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 47 min |
| May 14, 5:29 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 61 min |
| May 14, 6:07 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 53 min |
| May 14, 6:33 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 57 min |
| May 14, 7:00 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 30 min |
| May 14, 7:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 63 min |
| May 14, 8:11 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 34 min |
| May 15, 6:07 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 38 min |
| May 15, 6:33 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 42 min |
| May 15, 6:35 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 40 min |
| May 15, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 40 min |
| May 15, 6:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more | 65 min |
| May 15, 7:16 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford | 44 min |
| May 15, 7:18 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 42 min |
| May 15, 7:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 57 min |
| May 15, 7:54 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 51 min |
| May 15, 8:34 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 41 min |
| May 22, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 50 min |
| May 22, 5:08 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 52 min |
| May 22, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 16 min |
| May 26, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 22 min |
| May 26, 4:38 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 52 min |
| May 26, 5:25 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 28 min |
| May 27, 4:09 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 51 min |
| May 27, 4:15 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 60 min |
| May 31, 4:10 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 50 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Frederick County12
- Washington County12
- Prince George's County12
- Montgomery County9
- Carroll County8
- Baltimore County7
- Harford County7
- Cecil County7
- Kent County6
- Queen Anne's County6
- Charles County6
- Caroline County5
- Anne Arundel County5
- City of Baltimore4
- Allegany County4
- Calvert County3
- Dorchester County3
- Howard County2
- Talbot County2
- Saint Mary's County2
- Wicomico County2
- Somerset County2
- Garrett County1
- Worcester 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.