Alert archive / Maryland / 2021
Weather alerts in Maryland, May 2021
93 weather alerts in May 2021, 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 2021. Tap one for its archive.
- Alerts
- 93
- Warnings
- 49
- Watches
- 4
- Advisories
- 11
- Busiest day
- May 26, 202121 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 |
|---|---|---|---|---|
| Apr 30, 8:56 PM EDT | Wind Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 6 hr |
| May 3, 2:47 PM EDT | Mesoscale Discussion | SPC | Garrett | 118 min |
| May 3, 4:00 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 26 min |
| May 3, 4:24 PM EDT | Special Weather Statement | AKQ | Wicomico | 51 min |
| May 3, 6:26 PM EDT | Tornado Warning | LWX | Washington | 34 min |
| May 3, 6:50 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 40 min |
| May 3, 7:08 PM EDT | Areal Flood Warning | LWX | Washington | 3 hr |
| May 3, 7:16 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Harford, Howard, Kent and 1 more | 29 min |
| May 3, 7:40 PM EDT | Tornado Warning | LWX | Frederick | 35 min |
| May 3, 8:11 PM EDT | Tornado Warning | LWX | Frederick | 34 min |
| May 3, 8:31 PM EDT | Tornado Warning | LWX | Carroll | 29 min |
| May 3, 8:47 PM EDT | Areal Flood Warning | LWX | Frederick | 3 hr |
| May 3, 8:49 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 26 min |
| May 3, 8:56 PM EDT | Tornado Warning | LWX | Carroll | 34 min |
| May 3, 9:22 PM EDT | Tornado Warning | LWX | Baltimore | 24 min |
| May 4, 12:12 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 48 min |
| May 4, 1:04 PM EDT | Mesoscale Discussion | SPC | Charles | 56 min |
| May 4, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 8 more | 6 hr |
| May 4, 3:50 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Charles, Dorchester, Howard and 7 more | 115 min |
| May 4, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 50 min |
| May 4, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 33 min |
| May 4, 5:49 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 56 min |
| May 4, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 51 min |
| May 4, 6:32 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 43 min |
| May 4, 6:50 PM EDT | Special Weather Statement | PHI | Talbot | 40 min |
| May 4, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 41 min |
| May 4, 7:07 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 38 min |
| May 4, 7:38 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 67 min |
| May 5, 1:03 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 2 hr |
| May 5, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 50 min |
| May 5, 3:17 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Saint Mary's | 43 min |
| May 5, 3:39 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 61 min |
| May 5, 4:26 PM EDT | Special Weather Statement | AKQ | Wicomico | 49 min |
| May 5, 4:36 PM EDT | Special Weather Statement | AKQ | Somerset | 39 min |
| May 5, 5:05 PM EDT | Special Weather Statement | AKQ | Worcester | 40 min |
| May 5, 5:28 PM EDT | Severe Thunderstorm Warning | AKQ | Worcester | 21 min |
| May 7, 6:45 PM EDT | Special Weather Statement | AKQ | Wicomico | 30 min |
| May 8, 12:21 PM EDT | Special Weather Statement | AKQ | Worcester | 24 min |
| May 8, 12:45 PM EDT | Special Weather Statement | AKQ | Worcester | 45 min |
| May 8, 3:08 PM EDT | Special Weather Statement | AKQ | Wicomico | 37 min |
| May 8, 3:21 PM EDT | Special Weather Statement | PHI | Queen Anne's | 24 min |
| May 8, 3:38 PM EDT | Special Weather Statement | AKQ | Worcester | 37 min |
| May 8, 3:50 PM EDT | Special Weather Statement | PHI | Caroline | 25 min |
| May 8, 4:06 PM EDT | Special Weather Statement | PHI | Caroline | 24 min |
| May 8, 6:47 PM EDT | Special Weather Statement | PHI | Caroline | 28 min |
| May 9, 3:48 PM EDT | Coastal Flood Statement | AKQ | Dorchester, Somerset, Wicomico | 14 hr |
| May 9, 11:12 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, City of Baltimore | 8 hr |
| May 10, 3:26 PM EDT | Freeze Watch | LWX | 23 hr | |
| May 11, 2:25 PM EDT | Freeze Warning | LWX | 19 hr | |
| May 12, 4:06 AM EDT | Freeze Watch | LWX | 9 hr | |
| May 12, 1:32 PM EDT | Frost Advisory | LWX | Allegany | 19 hr |
| May 12, 1:32 PM EDT | Freeze Warning | LWX | 19 hr | |
| May 17, 2:51 AM EDT | Dense Fog Advisory | LWX | Allegany, Frederick, Washington | 7 hr |
| May 21, 4:12 AM EDT | Beach Hazards Statement | AKQ | Worcester | 4 days |
| May 25, 3:03 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, City of Baltimore | 19 hr |
| May 26, 3:41 AM EDT | Coastal Flood Advisory | LWX | Cecil, Harford | 6 hr |
| May 26, 1:21 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more | 84 min |
| May 26, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 18 more | 7 hr |
| May 26, 2:51 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 39 min |
| May 26, 3:21 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 39 min |
| May 26, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 44 min |
| May 26, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 28 min |
| May 26, 3:56 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 49 min |
| May 26, 3:59 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 9 min |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 10 more | 64 min |
| May 26, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 66 min |
| May 26, 5:00 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Montgomery, Prince George's | 45 min |
| May 26, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Harford, Howard, City of Baltimore | 49 min |
| May 26, 5:52 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 38 min |
| May 26, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 58 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 9 more | 116 min |
| May 26, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 39 min |
| May 26, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 39 min |
| May 26, 7:27 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 48 min |
| May 26, 7:53 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford, Howard, City of Baltimore | 52 min |
| May 26, 7:59 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 46 min |
| May 26, 8:21 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 39 min |
| May 26, 8:27 PM EDT | Special Weather Statement | CTP | Harford | 18 min |
| May 26, 8:53 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 52 min |
| May 26, 9:19 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Charles, Prince George's | 41 min |
| May 26, 9:35 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 27 min |
| May 28, 2:34 PM EDT | Tornado Warning | LWX | Saint Mary's | 26 min |
| May 28, 3:56 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's | 2 hr |
| May 28, 4:09 PM EDT | Special Weather Statement | AKQ | Dorchester | 51 min |
| May 28, 4:17 PM EDT | Beach Hazards Statement | AKQ | Worcester | 52 hr |
| May 28, 5:46 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 44 min |
| May 28, 6:15 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 34 min |
| May 28, 7:18 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico | 87 min |
| May 29, 4:00 AM EDT | Coastal Flood Advisory | AKQ | Worcester | 30 hr |
| May 29, 12:14 PM EDT | High Surf Advisory | AKQ | Worcester | 16 hr |
| May 29, 4:40 PM EDT | Coastal Flood Advisory | LWX | Saint Mary's | 119 min |
| May 30, 3:02 AM EDT | Coastal Flood Advisory | LWX | Charles, Saint Mary's | 11 hr |
| May 30, 4:17 AM EDT | High Surf Advisory | AKQ | Worcester | 6 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 | 38 |
| Tornado Warning | 7 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 10 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 2 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
| Coast and beach | |
| Coastal Flood Advisory | 6 |
| High Surf Advisory | 2 |
| Beach Hazards Statement | 2 |
| Coastal Flood Statement | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Charles County23
- Frederick County18
- Prince George's County18
- Anne Arundel County15
- Montgomery County15
- Worcester County14
- Baltimore County13
- Carroll County13
- Calvert County13
- Saint Mary's County13
- Dorchester County12
- Harford County12
- Howard County12
- City of Baltimore12
- Wicomico County11
- Washington County11
- Caroline County10
- Talbot County10
- Queen Anne's County9
- Kent County8
- Cecil County8
- Somerset County8
- Garrett County3
- Allegany County3
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.