Weather alerts in Maryland, 1999
111 weather alerts in 1999, 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 1999. Tap one for its archive.
- Alerts
- 111
- Warnings
- 94
- Watches
- 17
- Advisories
- 0
- Busiest month
- September33 alerts
- Busiest day
- September 16, 199917 alerts
Over time
By month
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 |
|---|---|---|---|---|
| Feb 12, 5:38 PM EST | Severe Thunderstorm Warning | LWX | Charles | 32 min |
| Mar 3, 4:45 PM EST | Tornado Watch | SPC | Calvert, Charles, Dorchester, Saint Mary's, Somerset, Wicomico and 1 more | 4 hr |
| Mar 3, 6:30 PM EST | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Caroline, Carroll, Cecil, Frederick and 9 more | 7 hr |
| Mar 3, 6:50 PM EST | Severe Thunderstorm Warning | LWX | Washington | 30 min |
| Mar 21, 7:57 PM EST | Flash Flood Warning | PHI | Cecil | 6 hr |
| Apr 9, 4:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Charles, Frederick, Garrett, Howard, Montgomery and 2 more | 5 hr |
| Apr 9, 4:09 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 59 min |
| Apr 9, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 49 min |
| Apr 9, 6:34 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 41 min |
| Apr 9, 7:13 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 47 min |
| Apr 9, 7:24 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 36 min |
| Apr 9, 7:35 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset, Wicomico | 45 min |
| Apr 9, 7:35 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 45 min |
| Apr 10, 7:30 PM EDT | Severe Thunderstorm Watch | SPC | Dorchester, Saint Mary's, Somerset, Wicomico, Worcester | 4 hr |
| Apr 11, 2:16 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 59 min |
| Apr 23, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 5 hr |
| Apr 23, 4:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Carroll, Charles, Frederick and 7 more | 6 hr |
| Apr 23, 4:20 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 50 min |
| Apr 23, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Talbot | 32 min |
| Apr 23, 4:34 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 31 min |
| Apr 23, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 32 min |
| Apr 23, 4:43 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 32 min |
| Apr 23, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 51 min |
| Apr 23, 4:56 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 34 min |
| Apr 23, 5:12 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 48 min |
| Apr 23, 5:55 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 35 min |
| Apr 23, 6:15 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 30 min |
| May 7, 6:42 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 58 min |
| May 7, 7:43 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 62 min |
| May 24, 8:50 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 20 min |
| May 24, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more | 6 hr |
| May 24, 1:43 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 32 min |
| May 24, 1:57 PM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 33 min |
| May 24, 2:14 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 31 min |
| May 24, 2:27 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 48 min |
| May 24, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 47 min |
| Jun 2, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 34 min |
| Jun 14, 5:37 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 48 min |
| Jun 14, 5:50 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert | 60 min |
| Jul 17, 7:16 PM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 59 min |
| Jul 17, 7:28 PM EDT | Flash Flood Warning | PBZ | Garrett | 2 hr |
| Jul 22, 8:53 AM EDT | Severe Thunderstorm Warning | AKQ | Somerset | 32 min |
| Jul 22, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | Calvert, Charles, Saint Mary's | 6 hr |
| Jul 22, 9:14 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's | 31 min |
| Jul 24, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Charles, Prince George's, Queen Anne's | 6 hr |
| Jul 24, 1:30 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 50 min |
| Jul 24, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | Calvert, Caroline, Dorchester, Saint Mary's, Somerset, Talbot and 2 more | 7 hr |
| Jul 24, 2:33 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 62 min |
| Jul 24, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Calvert | 32 min |
| Jul 24, 2:56 PM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 44 min |
| Jul 25, 7:56 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 34 min |
| Jul 28, 11:00 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 6 hr |
| Jul 28, 4:23 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Howard | 62 min |
| Jul 30, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | Howard | 32 min |
| Jul 30, 6:22 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 33 min |
| Jul 30, 7:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore | 45 min |
| Jul 30, 8:12 PM EDT | Tornado Warning | LWX | Baltimore | 33 min |
| Jul 30, 8:38 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 47 min |
| Aug 1, 12:21 AM EDT | Severe Thunderstorm Warning | PBZ | Garrett | 54 min |
| Aug 13, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Garrett | 5 hr |
| Aug 13, 11:34 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 46 min |
| Aug 14, 3:11 AM EDT | Severe Thunderstorm Warning | AKQ | Dorchester | 34 min |
| Aug 14, 1:25 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 50 min |
| Aug 14, 1:47 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 48 min |
| Aug 14, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | |
| Aug 14, 3:33 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 47 min |
| Aug 14, 3:39 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 46 min |
| Aug 14, 3:58 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 47 min |
| Aug 14, 4:58 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Prince George's | 47 min |
| Aug 14, 5:22 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 48 min |
| Aug 26, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 50 min |
| Aug 26, 4:48 PM EDT | Severe Thunderstorm Warning | LWX | Carroll | 32 min |
| Aug 26, 5:11 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 49 min |
| Aug 26, 6:40 PM EDT | Flash Flood Warning | LWX | Baltimore | 2 hr |
| Aug 26, 7:37 PM EDT | Flash Flood Warning | LWX | City of Baltimore | 2 hr |
| Aug 26, 7:55 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Prince George's | 2 hr |
| Aug 26, 8:00 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 45 min |
| Sep 5, 12:00 AM EDT | Tornado Watch | SPC | Saint Mary's, Somerset, Worcester | 8 hr |
| Sep 5, 8:00 AM EDT | Tornado Watch | SPC | Anne Arundel, Calvert, Charles, Howard, Kent, Montgomery and 5 more | 8 hr |
| Sep 5, 4:00 PM EDT | Tornado Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Cecil and 12 more | 6 hr |
| Sep 6, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 47 min |
| Sep 7, 8:08 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 62 min |
| Sep 9, 5:42 PM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 63 min |
| Sep 9, 6:23 PM EDT | Flash Flood Warning | LWX | Howard | 62 min |
| Sep 9, 7:37 PM EDT | Flash Flood Warning | LWX | Baltimore, Howard | 93 min |
| Sep 9, 7:37 PM EDT | Flash Flood Warning | LWX | City of Baltimore | 93 min |
| Sep 9, 7:54 PM EDT | Flash Flood Warning | LWX | Montgomery | 91 min |
| Sep 9, 9:32 PM EDT | Flash Flood Warning | LWX | Montgomery | 3 hr |
| Sep 15, 9:00 PM EDT | Tornado Watch | SPC | Dorchester, Saint Mary's, Somerset, Wicomico, Worcester | 12 hr |
| Sep 16, 8:04 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 8 hr |
| Sep 16, 8:04 AM EDT | Flash Flood Warning | LWX | Saint Mary's | 8 hr |
| Sep 16, 8:04 AM EDT | Flash Flood Warning | LWX | Baltimore, City of Baltimore | 8 hr |
| Sep 16, 8:04 AM EDT | Flash Flood Warning | LWX | Harford | 8 hr |
| Sep 16, 9:25 AM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 6 hr |
| Sep 16, 9:25 AM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 6 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | LWX | Montgomery | 5 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | LWX | Carroll, Howard | 5 hr |
| Sep 16, 3:12 PM EDT | Flash Flood Warning | PHI | Caroline, Queen Anne's, Talbot | 3 hr |
| Sep 16, 3:12 PM EDT | Flash Flood Warning | PHI | Cecil, Kent | 3 hr |
| Sep 16, 4:05 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Prince George's | 3 hr |
| Sep 16, 4:05 PM EDT | Flash Flood Warning | LWX | Baltimore, Carroll, Harford, Howard, City of Baltimore | 3 hr |
| Sep 16, 4:55 PM EDT | Flash Flood Warning | AKQ | Somerset, Wicomico, Worcester | 3 hr |
| Sep 16, 4:55 PM EDT | Flash Flood Warning | AKQ | Dorchester | 3 hr |
| Sep 16, 6:13 PM EDT | Flash Flood Warning | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Sep 16, 6:13 PM EDT | Flash Flood Warning | PHI | Caroline, Talbot | 3 hr |
| Sep 16, 8:10 PM EDT | Flash Flood Warning | AKQ | Dorchester, Somerset, Wicomico, Worcester | 8 hr |
| Sep 29, 11:21 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 49 min |
| Sep 29, 11:55 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 45 min |
| Sep 30, 12:41 AM EDT | Severe Thunderstorm Warning | LWX | Carroll, Howard | 44 min |
| Sep 30, 12:55 AM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 45 min |
| Nov 2, 4:18 PM EST | Severe Thunderstorm Warning | LWX | Washington | 62 min |
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 | 65 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 5 |
| Flooding | |
| Flash Flood Warning | 28 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Prince George's County16
- Dorchester County15
- Saint Mary's County15
- Baltimore County15
- Howard County15
- Montgomery County15
- Charles County14
- Calvert County14
- City of Baltimore14
- Somerset County13
- Cecil County13
- Anne Arundel County12
- Queen Anne's County12
- Kent County11
- Washington County11
- Garrett County11
- Carroll County10
- Frederick County10
- Talbot County10
- Wicomico County9
- Harford County9
- Caroline County8
- Worcester County7
- Allegany County6
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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. Rebuilt daily.