Alert archive / Maryland / 2020

Weather alerts in Maryland, September 2020

115 weather alerts in September 2020, 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 September 2020. Tap one for its archive.

Alerts
115
Warnings
48
Watches
5
Advisories
34
Busiest day
September 3, 202031 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.

IssuedProductOfficeCountiesLasted
Sep 2, 3:37 PM EDTMesoscale DiscussionSPCAnne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles and 9 more53 min
Sep 2, 6:17 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Washington43 min
Sep 2, 6:32 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington43 min
Sep 2, 6:43 PM EDTSevere Thunderstorm WatchSPCAnne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 10 more5 hr
Sep 2, 6:54 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick51 min
Sep 2, 7:06 PM EDTSevere Thunderstorm WarningLWXFrederick, Howard, Montgomery39 min
Sep 2, 7:36 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford, Howard39 min
Sep 2, 7:38 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery33 min
Sep 2, 8:02 PM EDTSevere Thunderstorm WarningLWXHarford43 min
Sep 2, 8:07 PM EDTSevere Thunderstorm WarningPHICecil53 min
Sep 2, 8:20 PM EDTMesoscale DiscussionSPCAnne Arundel, Baltimore, Caroline, Cecil, Harford, Howard and 6 more115 min
Sep 2, 8:45 PM EDTSevere Thunderstorm WarningLWXAnne Arundel9 min
Sep 2, 8:47 PM EDTSevere Thunderstorm WarningPHICaroline, Cecil, Kent, Queen Anne's, Talbot58 min
Sep 2, 10:08 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot67 min
Sep 2, 11:09 PM EDTSpecial Weather StatementAKQCaroline36 min
Sep 3, 3:06 PM EDTMesoscale DiscussionSPCAllegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more114 min
Sep 3, 3:30 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington45 min
Sep 3, 3:41 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery49 min
Sep 3, 3:42 PM EDTTornado WatchSPCAnne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 16 more6 hr
Sep 3, 3:43 PM EDTTornado WarningLWXCarroll, Frederick, Howard19 min
Sep 3, 4:07 PM EDTSevere Thunderstorm WarningLWXMontgomery38 min
Sep 3, 4:31 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Howard, City of Baltimore44 min
Sep 3, 4:36 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's54 min
Sep 3, 4:36 PM EDTTornado WarningLWXBaltimore, Carroll, Howard, City of Baltimore24 min
Sep 3, 4:43 PM EDTTornado WarningLWXHoward, Montgomery, Prince George's32 min
Sep 3, 5:05 PM EDTTornado WarningLWXBaltimore, Harford, City of Baltimore40 min
Sep 3, 5:10 PM EDTTornado WarningLWXMontgomery, Prince George's35 min
Sep 3, 5:14 PM EDTAreal Flood WarningLWXMontgomery, Prince George's6 hr
Sep 3, 5:16 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's59 min
Sep 3, 5:27 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Montgomery, Prince George's63 min
Sep 3, 5:29 PM EDTFlash Flood Warning Considerable damage threatLWXMontgomery, Prince George's3 hr
Sep 3, 5:33 PM EDTAreal Flood WarningLWXBaltimore, Carroll, Harford, Howard, City of Baltimore3 hr
Sep 3, 5:47 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot73 min
Sep 3, 5:55 PM EDTTornado WarningLWXAnne Arundel14 min
Sep 3, 6:18 PM EDTMesoscale DiscussionSPCAnne Arundel, Caroline, Queen Anne's, Talbot117 min
Sep 3, 6:42 PM EDTSpecial Weather StatementAKQDorchester63 min
Sep 3, 6:48 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot57 min
Sep 3, 7:10 PM EDTAreal Flood WarningLWXPrince George's2 hr
Sep 3, 7:41 PM EDTAreal Flood WarningLWXAnne Arundel, Prince George's6 hr
Sep 3, 9:24 PM EDTSpecial Weather StatementAKQDorchester66 min
Sep 3, 11:07 PM EDTAreal Flood WarningLWXMontgomery, Prince George's25 min
Sep 4, 12:46 AM EDTSpecial Weather StatementAKQWorcester44 min
Sep 4, 12:59 AM EDTSpecial Weather StatementPHICaroline46 min
Sep 4, 1:28 PM EDTAreal Flood WarningLWXPrince George's6 hr
Sep 4, 7:43 PM EDTSpecial Weather StatementAKQDorchester47 min
Sep 4, 8:29 PM EDTSpecial Weather StatementAKQWicomico46 min
Sep 4, 9:38 PM EDTSpecial Weather StatementAKQWorcester52 min
Sep 8, 9:41 PM EDTBeach Hazards StatementAKQWorcester46 hr
Sep 9, 2:15 PM EDTFlash Flood WatchLWXAnne Arundel, Baltimore, Calvert, Carroll, Charles, Harford and 5 more30 hr
Sep 9, 2:26 PM EDTFlash Flood WatchAKQDorchester, Somerset, Wicomico, Worcester31 hr
Sep 9, 5:08 PM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot29 hr
Sep 10, 4:35 AM EDTFlash Flood Warning Considerable damage threatLWXSaint Mary's4 hr
Sep 10, 5:46 AM EDTSpecial Weather StatementAKQWorcester59 min
Sep 10, 6:15 AM EDTSpecial Weather StatementAKQDorchester45 min
Sep 10, 6:33 AM EDTFlash Flood Warning Considerable damage threatLWXCharles2 hr
Sep 10, 8:09 AM EDTAreal Flood AdvisoryAKQDorchester3 hr
Sep 10, 8:21 AM EDTAreal Flood WarningLWXCharles, Saint Mary's7 hr
Sep 10, 8:35 AM EDTAreal Flood WarningLWXSaint Mary's8 hr
Sep 10, 12:41 PM EDTFlash Flood WarningLWXMontgomery4 hr
Sep 10, 1:28 PM EDTFlash Flood WarningLWXMontgomery, Prince George's3 hr
Sep 10, 2:01 PM EDTAreal Flood WarningLWXCharles3 hr
Sep 10, 2:34 PM EDTFlash Flood Warning Considerable damage threatLWXPrince George's2 hr
Sep 10, 3:47 PM EDTFlash Flood Warning Considerable damage threatLWXCharles, Saint Mary's3 hr
Sep 10, 4:14 PM EDTAreal Flood WarningLWXMontgomery, Prince George's9 hr
Sep 10, 4:33 PM EDTAreal Flood WarningLWXCalvert, Charles, Prince George's5 hr
Sep 10, 4:37 PM EDTAreal Flood WarningLWXPrince George's4 hr
Sep 10, 6:37 PM EDTAreal Flood WarningLWXCharles, Saint Mary's4 hr
Sep 11, 1:58 AM EDTAreal Flood WarningLWXPrince George's9 hr
Sep 12, 12:28 PM EDTCoastal Flood AdvisoryLWXAnne Arundel6 hr
Sep 12, 6:37 PM EDTCoastal Flood AdvisoryLWXAnne Arundel, Baltimore, Calvert, Charles, Saint Mary's, City of Baltimore12 hr
Sep 12, 6:51 PM EDTBeach Hazards StatementAKQWorcester4 days
Sep 12, 7:33 PM EDTCoastal Flood AdvisoryAKQDorchester, Somerset, Wicomico7 hr
Sep 13, 3:54 AM EDTCoastal Flood StatementAKQDorchester, Somerset, Wicomico8 hr
Sep 13, 8:35 AM EDTCoastal Flood AdvisoryLWXSaint Mary's5 hr
Sep 13, 2:54 PM EDTCoastal Flood StatementAKQDorchester, Somerset, Wicomico13 hr
Sep 13, 10:36 PM EDTCoastal Flood AdvisoryLWXAnne Arundel8 hr
Sep 16, 2:29 AM EDTCoastal Flood AdvisoryLWXAnne Arundel4 hr
Sep 16, 9:55 PM EDTCoastal Flood StatementAKQDorchester6 hr
Sep 17, 2:25 AM EDTCoastal Flood AdvisoryLWXAnne Arundel4 hr
Sep 17, 3:52 PM EDTBeach Hazards StatementAKQWorcester52 hr
Sep 17, 3:52 PM EDTCoastal Flood AdvisoryAKQDorchester, Somerset, Wicomico, Worcester5 days
Sep 17, 3:52 PM EDTHigh Surf AdvisoryAKQWorcester6 days
Sep 18, 9:12 AM EDTFrost AdvisoryPBZ24 hr
Sep 19, 1:17 PM EDTFrost AdvisoryPBZ20 hr
Sep 19, 1:37 PM EDTFrost AdvisoryLWXAllegany, Washington20 hr
Sep 19, 9:07 PM EDTBeach Hazards StatementAKQWorcester4 days
Sep 20, 12:12 PM EDTFrost AdvisoryPBZ21 hr
Sep 20, 1:43 PM EDTFrost AdvisoryLWXAllegany, Carroll, Frederick, Washington19 hr
Sep 20, 3:58 PM EDTCoastal Flood AdvisoryLWXSaint Mary's3 hr
Sep 20, 8:55 PM EDTFreeze WarningLWXAllegany5 hr
Sep 21, 2:15 AM EDTCoastal Flood AdvisoryLWXSaint Mary's4 hr
Sep 21, 5:27 AM EDTCoastal Flood AdvisoryAKQDorchester, Somerset, Wicomico, Worcester17 hr
Sep 21, 1:28 PM EDTCoastal Flood AdvisoryLWXAnne Arundel, Baltimore, Charles, Harford, Saint Mary's, City of Baltimore20 hr
Sep 21, 1:31 PM EDTFrost AdvisoryLWXAllegany, Baltimore, Carroll, Frederick, Harford, Howard and 2 more19 hr
Sep 21, 3:35 PM EDTFrost AdvisoryPBZ17 hr
Sep 22, 5:17 AM EDTCoastal Flood StatementAKQWorcester13 hr
Sep 22, 5:17 AM EDTCoastal Flood AdvisoryAKQDorchester, Somerset, Wicomico18 hr
Sep 22, 1:39 PM EDTCoastal Flood AdvisoryLWXAnne Arundel, Saint Mary's11 hr
Sep 23, 5:12 AM EDTCoastal Flood StatementAKQWorcester13 hr
Sep 23, 7:15 PM EDTCoastal Flood AdvisoryLWXAnne Arundel, Baltimore, Harford, City of Baltimore10 hr
Sep 24, 6:39 AM EDTCoastal Flood AdvisoryLWXAnne Arundel, Saint Mary's6 hr
Sep 25, 8:01 AM EDTDense Fog AdvisoryPHICaroline, Cecil, Kent, Queen Anne's, Talbot119 min
Sep 26, 10:54 AM EDTSpecial Weather StatementAKQWicomico51 min
Sep 26, 12:04 PM EDTAreal Flood AdvisoryAKQWicomico116 min
Sep 26, 12:44 PM EDTAreal Flood AdvisoryAKQDorchester2 hr
Sep 26, 11:55 PM EDTDense Fog AdvisoryLWXAllegany, Anne Arundel, Calvert, Saint Mary's10 hr
Sep 27, 10:10 AM EDTDense Fog AdvisoryLWXAllegany50 min
Sep 29, 12:42 AM EDTCoastal Flood AdvisoryLWXAnne Arundel8 hr
Sep 29, 10:52 AM EDTSpecial Weather StatementAKQWicomico38 min
Sep 29, 11:35 AM EDTSpecial Weather StatementAKQSomerset, Wicomico55 min
Sep 29, 4:02 PM EDTCoastal Flood StatementAKQDorchester, Somerset, Wicomico13 hr
Sep 29, 8:04 PM EDTAreal Flood AdvisoryPHICecil, Kent, Queen Anne's105 min
Sep 30, 12:12 AM EDTAreal Flood AdvisoryPHICaroline, Cecil, Kent, Queen Anne's, Talbot4 hr
Sep 30, 12:20 AM EDTAreal Flood AdvisoryAKQDorchester, Somerset, Wicomico3 hr
Sep 30, 1:04 AM EDTSpecial Weather StatementAKQWorcester41 min

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

By county

Every county with at least one alert. A county page lists each alert that covered it.

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.