Alert archive / Maryland / 2026
Weather alerts in Maryland, May 2026
40 weather alerts in May 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in May 2026. Tap one for its archive.
- Alerts
- 40
- Warnings
- 16
- Watches
- 6
- Advisories
- 8
- Busiest day
- May 20, 202613 alerts
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 1, 12:06 PM EDT | Freeze Watch | LWX | Allegany, Garrett | 24 hr |
| May 2, 3:50 AM EDT | Coastal Flood Advisory | LWX | Anne Arundel | 4 hr |
| May 2, 12:07 PM EDT | Frost Advisory | LWX | Baltimore, Carroll, Frederick, Harford, Washington | 21 hr |
| May 2, 12:07 PM EDT | Freeze Warning | LWX | Allegany, Garrett | 21 hr |
| May 7, 11:52 AM EDT | Frost Advisory | LWX | Garrett | 20 hr |
| May 9, 2:56 AM EDT | Coastal Flood Advisory | LWX | Anne Arundel | 10 hr |
| May 10, 12:27 PM EDT | Freeze Watch | LWX | Allegany, Garrett | 24 hr |
| May 10, 3:10 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Charles, Frederick and 7 more | 3 hr |
| May 11, 12:46 PM EDT | Frost Advisory | LWX | Allegany | 19 hr |
| May 11, 12:46 PM EDT | Freeze Warning | LWX | Allegany, Garrett | 19 hr |
| May 13, 12:41 PM EDT | Mesoscale Discussion | SPC | Garrett | 3 hr |
| May 13, 5:16 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Garrett | 29 min |
| May 13, 7:11 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 34 min |
| May 18, 5:10 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 20 min |
| May 19, 5:40 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 5 more | 65 min |
| May 20, 12:23 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 7 more | 97 min |
| May 20, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Cecil, Frederick and 7 more | 7 hr |
| May 20, 1:37 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 27 min |
| May 20, 2:10 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Kent, Queen Anne's, Talbot | 7 hr |
| May 20, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 44 min |
| May 20, 3:09 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Cecil, Frederick, Harford, Howard and 3 more | 96 min |
| May 20, 3:41 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 34 min |
| May 20, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 27 min |
| May 20, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 51 min |
| May 20, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Cecil, Harford | 35 min |
| May 20, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 42 min |
| May 20, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 54 min |
| May 20, 5:29 PM EDT | Mesoscale Discussion | SPC | Caroline | 61 min |
| May 21, 8:08 PM EDT | Beach Hazards Statement | AKQ | Worcester | 72 hr |
| May 25, 4:07 AM EDT | Dense Fog Advisory | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 5 hr |
| May 26, 3:56 AM EDT | Dense Fog Advisory | LWX | Baltimore, Carroll, Cecil, Harford | 3 hr |
| May 26, 12:19 PM EDT | Flood Watch | LWX | Allegany, Garrett | 32 hr |
| May 27, 5:40 AM EDT | Areal Flood Warning | LWX | Garrett | 5 hr |
| May 27, 11:15 AM EDT | Areal Flood Warning | LWX | Allegany | 2 hr |
| May 27, 11:20 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 40 min |
| May 27, 12:31 PM EDT | Mesoscale Discussion | SPC | Charles, Dorchester, Saint Mary's, Somerset, Wicomico, Worcester | 119 min |
| May 27, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico and 1 more | 9 hr |
| May 27, 3:21 PM EDT | Mesoscale Discussion | SPC | Saint Mary's | 114 min |
| May 31, 1:34 PM EDT | Coastal Flood Statement | AKQ | Dorchester, Somerset, Wicomico | 17 hr |
| May 31, 2:37 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, Harford, City of Baltimore | 21 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 12 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 8 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flood Watch | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Coastal Flood Advisory | 3 |
| Beach Hazards Statement | 1 |
| Coastal Flood Statement | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegany County12
- Garrett County11
- Baltimore County11
- Harford County11
- Carroll County10
- Frederick County9
- Washington County9
- Cecil County9
- Anne Arundel County8
- Howard County6
- Kent County6
- Montgomery County6
- City of Baltimore6
- Prince George's County4
- Charles County3
- Caroline County3
- Queen Anne's County3
- Worcester County3
- Dorchester County3
- Saint Mary's County3
- Somerset County3
- Wicomico County3
- Talbot County1
- Calvert County1
Nearby
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.