Alert archive / Maryland / 2010
Weather alerts in Maryland, April 2010
76 weather alerts in April 2010, 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 April 2010. Tap one for its archive.
- Alerts
- 76
- Warnings
- 34
- Watches
- 8
- Advisories
- 5
- Busiest day
- April 16, 201017 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 7, 9:57 AM EDT | Red Flag Warning | LWX | Allegany, Carroll, Frederick, Washington | 9 hr |
| Apr 7, 10:01 AM EDT | Red Flag Warning | PBZ | 9 hr | |
| Apr 8, 5:17 PM EDT | Special Weather Statement | LWX | Frederick, Washington | 43 min |
| Apr 8, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 45 min |
| Apr 8, 6:37 PM EDT | Mesoscale Discussion | SPC | Charles, Frederick, Montgomery | 53 min |
| Apr 8, 7:31 PM EDT | Special Weather Statement | LWX | Prince George's | 44 min |
| Apr 8, 7:45 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Montgomery, Prince George's | 29 min |
| Apr 8, 8:00 PM EDT | Special Weather Statement | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 60 min |
| Apr 8, 8:12 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Charles, Howard, Montgomery, Prince George's | 31 min |
| Apr 8, 8:28 PM EDT | Special Weather Statement | LWX | City of Baltimore | 32 min |
| Apr 8, 9:25 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 37 min |
| Apr 10, 10:50 AM EDT | Red Flag Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 8 hr |
| Apr 14, 12:00 AM EDT | Dense Fog Advisory | LWX | Baltimore, Carroll, Frederick, Washington | 10 hr |
| Apr 14, 3:07 PM EDT | Frost Advisory | AKQ | Dorchester, Somerset, Wicomico | 13 hr |
| Apr 16, 1:28 PM EDT | Severe Thunderstorm Watch | SPC | Garrett | 7 hr |
| Apr 16, 1:32 PM EDT | Red Flag Warning | LWX | Anne Arundel, Baltimore, Calvert, Carroll, Frederick, Saint Mary's and 2 more | 6 hr |
| Apr 16, 3:44 PM EDT | Special Weather Statement | LWX | Frederick, Washington | 61 min |
| Apr 16, 4:17 PM EDT | Special Weather Statement | LWX | Baltimore, Carroll, Frederick, Howard | 58 min |
| Apr 16, 4:28 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 32 min |
| Apr 16, 4:34 PM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Frederick, Garrett, Washington | 86 min |
| Apr 16, 4:51 PM EDT | Special Weather Statement | LWX | Baltimore, Harford | 54 min |
| Apr 16, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 1 more | 50 min |
| Apr 16, 5:27 PM EDT | Special Weather Statement | LWX | Washington | 93 min |
| Apr 16, 6:14 PM EDT | Mesoscale Discussion | SPC | Allegany, Carroll, Garrett, Washington | 61 min |
| Apr 16, 6:16 PM EDT | Special Weather Statement | LWX | Baltimore, Carroll, Charles, Frederick, Howard, Montgomery and 2 more | 74 min |
| Apr 16, 6:20 PM EDT | Special Weather Statement | LWX | Baltimore, Carroll, Charles, Frederick, Howard, Montgomery and 2 more | 70 min |
| Apr 16, 6:30 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick | 30 min |
| Apr 16, 6:56 PM EDT | Special Weather Statement | LWX | Baltimore, Harford, City of Baltimore | 64 min |
| Apr 16, 7:01 PM EDT | Special Weather Statement | LWX | Allegany, Washington | 74 min |
| Apr 16, 7:21 PM EDT | Special Weather Statement | LWX | Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's | 84 min |
| Apr 16, 7:41 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 34 min |
| Apr 16, 8:05 PM EDT | Special Weather Statement | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 2 more | 70 min |
| Apr 17, 9:31 AM EDT | Red Flag Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 11 hr |
| Apr 18, 8:59 AM EDT | Freeze Watch | LWX | Frederick, Washington | 5 hr |
| Apr 22, 12:37 AM EDT | Dense Fog Advisory | LWX | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 4 more | 8 hr |
| Apr 25, 10:56 AM EDT | Mesoscale Discussion | SPC | Allegany, Baltimore, Carroll, Frederick, Garrett, Harford and 4 more | 2 hr |
| Apr 25, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | Garrett | 6 hr |
| Apr 25, 2:26 PM EDT | Mesoscale Discussion | SPC | Allegany, Charles, Garrett, Washington | 94 min |
| Apr 25, 4:16 PM EDT | Special Weather Statement | LWX | Allegany | 29 min |
| Apr 25, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 12 more | 6 hr |
| Apr 25, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 42 min |
| Apr 25, 5:39 PM EDT | Tornado Warning | LWX | Frederick, Washington | 36 min |
| Apr 25, 6:10 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 50 min |
| Apr 25, 6:16 PM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 14 more | 89 min |
| Apr 25, 6:30 PM EDT | Areal Flood Warning | LWX | Frederick | 3 hr |
| Apr 25, 7:01 PM EDT | Flash Flood Warning | LWX | Carroll, Frederick, Washington | 3 hr |
| Apr 25, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery, Washington | 41 min |
| Apr 25, 7:19 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery, Washington | 41 min |
| Apr 25, 7:31 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 44 min |
| Apr 25, 7:54 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Howard, Montgomery | 51 min |
| Apr 25, 8:05 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford, Howard, City of Baltimore | 40 min |
| Apr 25, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 47 min |
| Apr 25, 8:36 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Carroll, Howard, Montgomery, City of Baltimore | 39 min |
| Apr 25, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 54 min |
| Apr 25, 8:53 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Charles and 12 more | 2 hr |
| Apr 25, 8:58 PM EDT | Special Weather Statement | LWX | Frederick | 32 min |
| Apr 25, 9:11 PM EDT | Special Weather Statement | LWX | Frederick | 34 min |
| Apr 25, 9:12 PM EDT | Special Weather Statement | LWX | City of Baltimore | 33 min |
| Apr 25, 9:40 PM EDT | Special Weather Statement | LWX | Montgomery | 35 min |
| Apr 25, 9:59 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more | 46 min |
| Apr 25, 10:04 PM EDT | Special Weather Statement | LWX | Baltimore, Howard, Montgomery, City of Baltimore | 26 min |
| Apr 26, 4:33 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 42 min |
| Apr 26, 5:19 PM EDT | Special Weather Statement | LWX | Charles | 26 min |
| Apr 26, 5:40 PM EDT | Tornado Warning | LWX | Charles, Saint Mary's | 35 min |
| Apr 26, 6:13 PM EDT | Mesoscale Discussion | SPC | Calvert, Charles, Dorchester, Prince George's, Saint Mary's, Somerset and 3 more | 62 min |
| Apr 26, 6:15 PM EDT | Tornado Warning | LWX | Saint Mary's | 30 min |
| Apr 27, 4:11 AM EDT | Freeze Watch | LWX | Allegany | 10 hr |
| Apr 27, 1:50 PM EDT | Frost Advisory | LWX | Baltimore, Carroll, Frederick, Washington | 16 hr |
| Apr 27, 1:50 PM EDT | Freeze Warning | LWX | Allegany | 19 hr |
| Apr 27, 2:34 PM EDT | Fire Weather Watch | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 14 hr |
| Apr 28, 4:12 AM EDT | Fire Weather Watch | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 16 hr |
| Apr 28, 4:12 AM EDT | Red Flag Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 16 hr |
| Apr 28, 4:16 AM EDT | Freeze Watch | LWX | Allegany | 10 hr |
| Apr 28, 2:05 PM EDT | Frost Advisory | LWX | Baltimore, Carroll, Frederick, Washington | 19 hr |
| Apr 28, 2:05 PM EDT | Freeze Warning | LWX | Allegany | 19 hr |
| Apr 28, 7:55 PM EDT | Red Flag Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 24 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 | 19 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 3 |
| Frost Advisory | 3 |
| Fire | |
| Red Flag Warning | 7 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Frederick County34
- Washington County27
- Carroll County26
- Baltimore County24
- Montgomery County20
- Howard County19
- City of Baltimore18
- Charles County16
- Allegany County13
- Prince George's County12
- Anne Arundel County11
- Kent County10
- Harford County10
- Calvert County9
- Queen Anne's County9
- Talbot County9
- Saint Mary's County9
- Cecil County8
- Caroline County8
- Garrett County7
- Somerset County4
- Dorchester County2
- Wicomico County2
- Worcester County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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.