Alert archive / Maryland / 2009
Weather alerts in Maryland, April 2009
38 weather alerts in April 2009, 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 2009. Tap one for its archive.
- Alerts
- 38
- Warnings
- 17
- Watches
- 2
- Advisories
- 16
- Busiest day
- April 21, 200913 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 2, 3:35 AM EDT | Dense Fog Advisory | LWX | Anne Arundel, Baltimore, Carroll, Charles, Frederick, Prince George's and 1 more | 6 hr |
| Apr 2, 5:13 AM EDT | Dense Fog Advisory | PHI | Cecil | 4 hr |
| Apr 3, 4:32 AM EDT | Wind Advisory | LWX | Allegany, Baltimore, Carroll, Frederick, Washington, City of Baltimore | 34 hr |
| Apr 3, 11:45 AM EDT | Wind Advisory | PBZ | 16 hr | |
| Apr 3, 3:08 PM EDT | Wind Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 29 hr |
| Apr 6, 10:45 AM EDT | Severe Thunderstorm Warning | AKQ | Wicomico, Worcester | 45 min |
| Apr 6, 2:47 PM EDT | Winter Weather Advisory | LWX | Allegany | 40 hr |
| Apr 6, 2:55 PM EDT | Winter Weather Advisory | PBZ | 38 hr | |
| Apr 16, 3:01 PM EDT | Frost Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 17 hr |
| Apr 16, 3:27 PM EDT | Frost Advisory | LWX | Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 3 more | 16 hr |
| Apr 16, 3:46 PM EDT | Frost Advisory | AKQ | Dorchester, Somerset, Wicomico, Worcester | 16 hr |
| Apr 19, 2:36 PM EDT | Flood Watch | PHI | Cecil | 22 hr |
| Apr 20, 2:50 PM EDT | Tornado Watch | SPC | Calvert, Charles, Saint Mary's | 7 hr |
| Apr 20, 4:57 PM EDT | Mesoscale Discussion | SPC | Charles, Saint Mary's, Somerset | 93 min |
| Apr 20, 6:06 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Baltimore, Calvert, Saint Mary's, City of Baltimore | 10 hr |
| Apr 20, 6:42 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico | 63 min |
| Apr 20, 6:58 PM EDT | Areal Flood Advisory | AKQ | Somerset, Wicomico, Worcester | 3 hr |
| Apr 20, 7:15 PM EDT | Mesoscale Discussion | SPC | Saint Mary's | 90 min |
| Apr 20, 8:40 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Saint Mary's | 33 min |
| Apr 20, 9:33 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's | 34 min |
| Apr 21, 6:30 AM EDT | Dense Fog Advisory | LWX | Allegany, Washington | 3 hr |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | Washington | 2 hr |
| Apr 21, 5:34 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 26 min |
| Apr 21, 6:22 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 38 min |
| Apr 21, 6:24 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 36 min |
| Apr 21, 6:31 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 44 min |
| Apr 21, 6:49 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Saint Mary's | 41 min |
| Apr 21, 7:24 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 10 min |
| Apr 21, 7:31 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 44 min |
| Apr 21, 7:38 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester, Somerset, Wicomico | 52 min |
| Apr 21, 7:51 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 39 min |
| Apr 22, 4:30 PM EDT | Severe Thunderstorm Warning | AKQ | Worcester | 34 min |
| Apr 23, 4:00 AM EDT | Frost Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 28 hr |
| Apr 23, 2:33 PM EDT | Frost Advisory | LWX | Baltimore, Carroll, Frederick | 17 hr |
| Apr 23, 3:22 PM EDT | Frost Advisory | AKQ | Dorchester, Somerset, Wicomico, Worcester | 17 hr |
| Apr 25, 7:47 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 47 min |
| Apr 26, 2:06 AM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico, Worcester | 54 min |
| Apr 28, 10:34 AM EDT | Red Flag Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 9 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 | 16 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 3 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 2 |
| Cold | |
| Frost Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Coast and beach | |
| Coastal Flood Advisory | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Charles County7
- Wicomico County7
- Saint Mary's County7
- Somerset County7
- Baltimore County6
- Cecil County6
- Caroline County6
- Worcester County6
- Anne Arundel County5
- Carroll County5
- Frederick County5
- Prince George's County5
- City of Baltimore5
- Talbot County5
- Calvert County5
- Kent County4
- Queen Anne's County4
- Allegany County3
- Washington County3
- Dorchester County3
- Howard County2
- Montgomery County2
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.