Alert archive / Maryland / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Maryland, 2022

274 severe thunderstorm warnings in 2022. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2022. Tap one for its archive.

Severe Thunderstorm Warnings
274
Busiest month
July96 severe thunderstorm warnings
Busiest day
June 2, 202221 severe thunderstorm warnings

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

198 of 274 severe thunderstorm warnings covering Maryland in 2022 had a qualifying storm report inside them; 471 of 589 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.

Maryland, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Severe thunderstorm warnings27419828%58980%23 min

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Wakefield, VA: severe thunderstorm warnings26719627%41792%21 min
NWS Baltimore/Washington: severe thunderstorm warnings41330027%1,17778%21 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings1709345%30690%21 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

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
Jan 16, 10:43 PM ESTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Prince George's47 min
Mar 7, 5:02 PM ESTSevere Thunderstorm WarningLWXAllegany, Garrett43 min
Mar 7, 7:24 PM ESTSevere Thunderstorm WarningLWXBaltimore, Carroll, Frederick, Harford, Washington51 min
Mar 31, 1:24 PM EDTSevere Thunderstorm WarningLWXGarrett36 min
Mar 31, 1:34 PM EDTSevere Thunderstorm WarningLWXGarrett41 min
Mar 31, 2:50 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett40 min
Mar 31, 3:26 PM EDTSevere Thunderstorm WarningLWXAllegany25 min
Mar 31, 3:48 PM EDTSevere Thunderstorm WarningLWXAllegany27 min
Mar 31, 5:56 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Washington26 min
Mar 31, 7:04 PM EDTSevere Thunderstorm WarningLWXCarroll41 min
Mar 31, 7:13 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick47 min
Mar 31, 7:42 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford36 min
Mar 31, 8:10 PM EDTSevere Thunderstorm WarningLWXBaltimore, Cecil, Harford20 min
Mar 31, 8:18 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's42 min
Mar 31, 9:50 PM EDTSevere Thunderstorm WarningLWXMontgomery19 min
May 1, 8:43 PM EDTSevere Thunderstorm WarningLWXGarrett47 min
May 16, 4:07 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXCharles, Prince George's38 min
May 16, 4:35 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's40 min
May 16, 5:11 PM EDTSevere Thunderstorm Warning Considerable damage threatAKQDorchester, Wicomico64 min
May 16, 5:20 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot40 min
May 16, 6:11 PM EDTSevere Thunderstorm Warning Considerable damage threatAKQDorchester, Wicomico, Worcester64 min
May 16, 7:35 PM EDTSevere Thunderstorm WarningAKQSomerset, Worcester40 min
May 20, 11:06 AM EDTSevere Thunderstorm WarningLWXGarrett39 min
May 20, 11:21 AM EDTSevere Thunderstorm WarningLWXGarrett39 min
May 20, 11:29 AM EDTSevere Thunderstorm WarningLWXAllegany46 min
May 20, 11:41 AM EDTSevere Thunderstorm WarningLWXAllegany, Garrett29 min
May 20, 12:09 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett, Washington51 min
May 20, 12:53 PM EDTSevere Thunderstorm WarningLWXWashington17 min
May 22, 3:35 PM EDTSevere Thunderstorm WarningLWXFrederick, Montgomery40 min
May 22, 3:58 PM EDTSevere Thunderstorm WarningLWXMontgomery30 min
May 22, 4:11 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery49 min
May 22, 4:21 PM EDTSevere Thunderstorm WarningLWXMontgomery27 min
May 22, 4:46 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore44 min
May 22, 5:02 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Montgomery, Prince George's28 min
May 22, 5:09 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's51 min
May 22, 5:30 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Montgomery, Prince George's45 min
May 22, 5:36 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Cecil, Harford, Howard, City of Baltimore39 min
May 22, 5:56 PM EDTSevere Thunderstorm WarningLWXPrince George's49 min
May 22, 6:13 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's41 min
May 22, 6:16 PM EDTSevere Thunderstorm WarningLWXCecil, Harford44 min
May 22, 6:37 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Prince George's12 min
May 22, 7:04 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Charles, Frederick, Howard, Montgomery and 1 more56 min
May 22, 7:26 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Calvert, Charles, Harford, Howard and 3 more64 min
May 22, 7:41 PM EDTSevere Thunderstorm WarningPHITalbot41 min
May 22, 8:28 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's32 min
May 22, 8:51 PM EDTSevere Thunderstorm WarningPHICaroline24 min
May 27, 11:43 AM EDTSevere Thunderstorm WarningLWXCharles, Prince George's47 min
May 27, 11:47 AM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's43 min
May 27, 11:59 AM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery46 min
May 27, 12:10 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's50 min
May 27, 12:27 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Charles, Prince George's48 min
May 27, 12:29 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's and 1 more46 min
May 27, 12:36 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll39 min
May 27, 12:45 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's45 min
May 27, 1:10 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot50 min
May 27, 1:15 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford45 min
May 27, 1:33 PM EDTSevere Thunderstorm WarningAKQDorchester42 min
May 27, 1:43 PM EDTSevere Thunderstorm WarningPHICaroline47 min
May 27, 1:44 PM EDTSevere Thunderstorm WarningLWXCecil46 min
May 27, 7:51 PM EDTSevere Thunderstorm WarningLWXCharles39 min
May 27, 8:50 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Prince George's30 min
May 27, 9:05 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot40 min
Jun 2, 3:07 PM EDTSevere Thunderstorm WarningLWXAnne Arundel38 min
Jun 2, 3:22 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's38 min
Jun 2, 3:25 PM EDTSevere Thunderstorm WarningLWXMontgomery50 min
Jun 2, 3:27 PM EDTSevere Thunderstorm WarningLWXAnne Arundel22 min
Jun 2, 3:52 PM EDTSevere Thunderstorm WarningLWXMontgomery38 min
Jun 2, 3:54 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot51 min
Jun 2, 3:57 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's20 min
Jun 2, 4:02 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Montgomery, Prince George's43 min
Jun 2, 4:18 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's42 min
Jun 2, 4:43 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's47 min
Jun 2, 4:45 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Prince George's47 min
Jun 2, 5:14 PM EDTSevere Thunderstorm WarningLWXCharles46 min
Jun 2, 5:31 PM EDTSevere Thunderstorm WarningAKQDorchester44 min
Jun 2, 5:31 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot29 min
Jun 2, 5:43 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's47 min
Jun 2, 5:58 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot47 min
Jun 2, 6:04 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's41 min
Jun 2, 6:12 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico48 min
Jun 2, 6:44 PM EDTSevere Thunderstorm WarningLWXSaint Mary's32 min
Jun 2, 7:03 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester27 min
Jun 2, 7:23 PM EDTSevere Thunderstorm WarningAKQSomerset, Worcester67 min
Jun 8, 5:20 PM EDTSevere Thunderstorm WarningLWXWashington28 min
Jun 8, 6:13 PM EDTSevere Thunderstorm WarningLWXCharles47 min
Jun 8, 6:25 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Prince George's37 min
Jun 8, 6:50 PM EDTSevere Thunderstorm WarningLWXCharles40 min
Jun 8, 6:58 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery26 min
Jun 8, 7:09 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll26 min
Jun 8, 8:17 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's43 min
Jun 8, 8:58 PM EDTSevere Thunderstorm WarningLWXGarrett47 min
Jun 8, 9:07 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXCalvert27 min
Jun 8, 9:22 PM EDTSevere Thunderstorm WarningAKQDorchester38 min
Jun 8, 9:23 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford, City of Baltimore21 min
Jun 8, 9:41 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXGarrett49 min
Jun 8, 11:11 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett37 min
Jun 12, 12:46 PM EDTSevere Thunderstorm WarningAKQSomerset, Worcester44 min
Jun 13, 6:31 PM EDTSevere Thunderstorm WarningLWXFrederick, Montgomery44 min
Jun 13, 6:57 PM EDTSevere Thunderstorm WarningLWXMontgomery48 min
Jun 13, 9:02 PM EDTSevere Thunderstorm WarningLWXCharles43 min
Jun 14, 4:01 AM EDTSevere Thunderstorm WarningLWXWashington44 min
Jun 14, 7:27 AM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's28 min
Jun 14, 9:52 AM EDTSevere Thunderstorm WarningPHICaroline, Talbot38 min
Jun 14, 10:08 AM EDTSevere Thunderstorm WarningAKQDorchester, Wicomico52 min
Jun 14, 10:30 AM EDTSevere Thunderstorm WarningPHICaroline45 min
Jun 14, 10:35 AM EDTSevere Thunderstorm WarningAKQWicomico40 min
Jun 14, 11:14 AM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester46 min
Jun 14, 11:54 AM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester47 min
Jun 16, 3:24 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington31 min
Jun 16, 3:28 PM EDTSevere Thunderstorm WarningLWXWashington23 min
Jun 16, 4:32 PM EDTSevere Thunderstorm WarningLWXMontgomery20 min
Jun 17, 6:01 PM EDTSevere Thunderstorm WarningLWXSaint Mary's44 min
Jun 17, 6:13 PM EDTSevere Thunderstorm WarningAKQWicomico, Worcester47 min
Jun 17, 7:24 PM EDTSevere Thunderstorm WarningAKQSomerset, Worcester51 min
Jun 17, 8:07 PM EDTSevere Thunderstorm WarningAKQWorcester23 min
Jun 22, 1:58 PM EDTSevere Thunderstorm WarningLWXCharles62 min
Jun 22, 2:56 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery, Washington34 min
Jun 22, 3:27 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington1 min
Jun 22, 3:37 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington38 min
Jun 22, 6:26 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett49 min
Jun 22, 7:07 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett33 min
Jun 22, 7:29 PM EDTSevere Thunderstorm WarningLWXAllegany, Washington46 min
Jul 1, 12:58 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington47 min
Jul 1, 1:33 PM EDTSevere Thunderstorm WarningLWXFrederick23 min
Jul 1, 2:11 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick23 min
Jul 1, 2:26 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery32 min
Jul 1, 2:33 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll42 min
Jul 1, 2:57 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Howard29 min
Jul 1, 2:57 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford48 min
Jul 1, 3:42 PM EDTSevere Thunderstorm WarningLWXCecil, Harford32 min
Jul 2, 3:32 AM EDTSevere Thunderstorm WarningLWXGarrett15 min
Jul 2, 3:43 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington47 min
Jul 2, 4:15 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington4 min
Jul 2, 4:19 PM EDTSevere Thunderstorm WarningLWXCecil18 min
Jul 2, 4:20 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington26 min
Jul 2, 5:32 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington29 min
Jul 2, 5:36 PM EDTSevere Thunderstorm WarningLWXFrederick39 min
Jul 2, 7:05 PM EDTSevere Thunderstorm WarningLWXMontgomery40 min
Jul 2, 7:33 PM EDTSevere Thunderstorm WarningLWXMontgomery18 min
Jul 2, 9:13 PM EDTSevere Thunderstorm WarningLWXCecil47 min
Jul 2, 9:14 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's28 min
Jul 2, 10:23 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot22 min
Jul 3, 1:17 AM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's43 min
Jul 5, 2:33 PM EDTSevere Thunderstorm WarningLWXSaint Mary's57 min
Jul 5, 4:55 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's29 min
Jul 5, 5:18 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's57 min
Jul 5, 6:55 PM EDTSevere Thunderstorm WarningPHICaroline33 min
Jul 7, 12:25 AM EDTSevere Thunderstorm WarningLWXCharles39 min
Jul 12, 1:52 PM EDTSevere Thunderstorm WarningLWXGarrett38 min
Jul 12, 2:25 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett65 min
Jul 12, 2:56 PM EDTSevere Thunderstorm WarningLWXAllegany29 min
Jul 12, 3:00 PM EDTSevere Thunderstorm WarningLWXAllegany, Washington45 min
Jul 12, 3:08 PM EDTSevere Thunderstorm WarningLWXGarrett52 min
Jul 12, 3:22 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington38 min
Jul 12, 3:48 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery, Washington42 min
Jul 12, 4:20 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford40 min
Jul 12, 4:27 PM EDTSevere Thunderstorm WarningLWXMontgomery48 min
Jul 12, 4:35 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford, City of Baltimore25 min
Jul 12, 4:44 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Frederick46 min
Jul 12, 4:50 PM EDTSevere Thunderstorm WarningLWXBaltimore, Cecil, Harford, City of Baltimore55 min
Jul 12, 5:04 PM EDTSevere Thunderstorm WarningLWXMontgomery41 min
Jul 12, 5:38 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's37 min
Jul 12, 5:56 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's64 min
Jul 12, 6:00 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Montgomery, Prince George's45 min
Jul 12, 6:36 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICaroline, Kent, Queen Anne's, Talbot39 min
Jul 12, 6:40 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXAnne Arundel19 min
Jul 12, 7:12 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot48 min
Jul 12, 7:37 PM EDTSevere Thunderstorm Warning Destructive damage threatPHICaroline23 min
Jul 12, 7:40 PM EDTSevere Thunderstorm WarningLWXPrince George's50 min
Jul 12, 8:06 PM EDTSevere Thunderstorm WarningLWXCharles39 min
Jul 12, 8:09 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICaroline21 min
Jul 12, 8:29 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Prince George's, Saint Mary's46 min
Jul 12, 9:03 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's42 min
Jul 12, 9:16 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico44 min
Jul 12, 9:57 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico, Worcester48 min
Jul 13, 12:26 AM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's49 min
Jul 14, 4:19 PM EDTSevere Thunderstorm WarningLWXCharles41 min
Jul 16, 2:43 PM EDTSevere Thunderstorm WarningLWXBaltimore, City of Baltimore32 min
Jul 16, 3:15 PM EDTSevere Thunderstorm WarningLWXAnne Arundel45 min
Jul 16, 4:50 PM EDTSevere Thunderstorm WarningLWXAnne Arundel23 min
Jul 16, 4:53 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's52 min
Jul 16, 5:36 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Prince George's, Saint Mary's39 min
Jul 17, 6:04 PM EDTSevere Thunderstorm WarningLWXCharles41 min
Jul 18, 2:30 PM EDTSevere Thunderstorm WarningLWXWashington45 min
Jul 18, 3:06 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Washington39 min
Jul 18, 3:38 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Frederick, Howard, Montgomery52 min
Jul 18, 3:44 PM EDTSevere Thunderstorm WarningLWXFrederick, Montgomery34 min
Jul 18, 4:22 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford, City of Baltimore38 min
Jul 18, 4:56 PM EDTSevere Thunderstorm WarningLWXBaltimore, Cecil, Harford49 min
Jul 18, 5:38 PM EDTSevere Thunderstorm WarningLWXCecil19 min
Jul 18, 5:42 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's63 min
Jul 18, 6:03 PM EDTSevere Thunderstorm WarningLWXCecil15 min
Jul 18, 6:44 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's61 min
Jul 18, 6:57 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's23 min
Jul 18, 7:38 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICaroline, Queen Anne's67 min
Jul 21, 2:37 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Prince George's38 min
Jul 21, 3:13 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's47 min
Jul 21, 3:16 PM EDTSevere Thunderstorm WarningAKQDorchester44 min
Jul 21, 3:51 PM EDTSevere Thunderstorm WarningPHITalbot24 min
Jul 21, 4:02 PM EDTSevere Thunderstorm WarningAKQDorchester43 min
Jul 21, 4:34 PM EDTSevere Thunderstorm WarningAKQSomerset23 min
Jul 21, 5:15 PM EDTSevere Thunderstorm WarningAKQWorcester45 min
Jul 21, 5:39 PM EDTSevere Thunderstorm WarningAKQWorcester36 min
Jul 23, 3:56 PM EDTSevere Thunderstorm WarningLWXAllegany, Garrett64 min
Jul 23, 4:29 PM EDTSevere Thunderstorm WarningLWXAllegany46 min
Jul 23, 5:17 PM EDTSevere Thunderstorm WarningLWXAllegany43 min
Jul 23, 5:55 PM EDTSevere Thunderstorm WarningLWXAllegany, Washington39 min
Jul 23, 6:19 PM EDTSevere Thunderstorm WarningLWXWashington41 min
Jul 23, 6:51 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington24 min
Jul 25, 2:26 PM EDTSevere Thunderstorm WarningLWXMontgomery49 min
Jul 25, 3:42 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's48 min
Jul 25, 4:11 PM EDTSevere Thunderstorm WarningLWXCharles49 min
Jul 25, 5:15 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's60 min
Jul 25, 5:56 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's64 min
Jul 25, 6:56 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico, Worcester49 min
Jul 25, 7:30 PM EDTSevere Thunderstorm WarningAKQWicomico, Worcester45 min
Jul 28, 5:49 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico, Worcester41 min
Jul 28, 6:23 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester42 min
Aug 1, 9:56 PM EDTSevere Thunderstorm WarningLWXMontgomery49 min
Aug 1, 10:37 PM EDTSevere Thunderstorm WarningLWXMontgomery38 min
Aug 2, 1:19 AM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's41 min
Aug 4, 2:35 PM EDTSevere Thunderstorm WarningLWXAllegany28 min
Aug 4, 3:00 PM EDTSevere Thunderstorm WarningLWXWashington45 min
Aug 4, 3:23 PM EDTSevere Thunderstorm WarningLWXWashington52 min
Aug 4, 4:07 PM EDTSevere Thunderstorm WarningLWXWashington25 min
Aug 4, 5:19 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Frederick, Howard, Montgomery41 min
Aug 4, 5:24 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's51 min
Aug 4, 5:42 PM EDTSevere Thunderstorm WarningLWXBaltimore, City of Baltimore48 min
Aug 4, 5:58 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Howard, Prince George's, City of Baltimore47 min
Aug 4, 6:09 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's26 min
Aug 4, 6:19 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford41 min
Aug 4, 6:28 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's47 min
Aug 4, 6:35 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's40 min
Aug 4, 6:53 PM EDTSevere Thunderstorm WarningLWXCecil, Harford52 min
Aug 4, 7:13 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's47 min
Aug 4, 7:15 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Charles, Prince George's45 min
Aug 4, 7:37 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot51 min
Aug 4, 7:41 PM EDTSevere Thunderstorm WarningPHIKent34 min
Aug 4, 8:06 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICaroline, Queen Anne's, Talbot39 min
Aug 4, 8:12 PM EDTSevere Thunderstorm WarningAKQDorchester, Wicomico48 min
Aug 4, 8:37 PM EDTSevere Thunderstorm WarningPHICaroline38 min
Aug 5, 12:37 AM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's17 min
Aug 5, 4:13 PM EDTSevere Thunderstorm WarningAKQWicomico36 min
Aug 5, 4:45 PM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's30 min
Aug 5, 4:52 PM EDTSevere Thunderstorm WarningLWXCharles38 min
Aug 5, 5:37 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot38 min
Aug 5, 5:44 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore31 min
Aug 5, 6:29 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's31 min
Aug 9, 7:35 PM EDTSevere Thunderstorm WarningLWXFrederick40 min
Aug 10, 3:51 PM EDTSevere Thunderstorm WarningLWXCharles39 min
Aug 10, 4:28 PM EDTSevere Thunderstorm WarningLWXMontgomery30 min
Aug 10, 4:52 PM EDTSevere Thunderstorm WarningLWXCharles26 min
Aug 10, 5:04 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's56 min
Aug 10, 5:45 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's45 min
Aug 10, 6:14 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's29 min
Aug 26, 3:25 PM EDTSevere Thunderstorm WarningPHITalbot50 min
Aug 30, 4:13 PM EDTSevere Thunderstorm WarningLWXCharles32 min
Aug 30, 4:50 PM EDTSevere Thunderstorm WarningLWXCharles23 min
Aug 30, 7:55 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester35 min
Sep 12, 4:28 PM EDTSevere Thunderstorm WarningLWXCharles47 min
Sep 12, 6:28 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's32 min
Sep 12, 7:45 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot45 min
Sep 12, 8:27 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's28 min
Sep 12, 10:02 PM EDTSevere Thunderstorm WarningAKQWorcester32 min
Sep 25, 10:58 AM EDTSevere Thunderstorm WarningLWXAllegany, Garrett36 min
Sep 25, 11:20 AM EDTSevere Thunderstorm WarningLWXAllegany40 min
Sep 25, 1:39 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXFrederick, Montgomery, Washington51 min
Sep 25, 1:53 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Cecil, Harford41 min
Sep 25, 4:46 PM EDTSevere Thunderstorm WarningLWXAnne Arundel29 min
Sep 25, 4:55 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot35 min
Sep 25, 5:25 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot35 min
Oct 17, 8:04 PM EDTSevere Thunderstorm WarningAKQWicomico, Worcester37 min
Nov 30, 12:00 PM ESTSevere Thunderstorm WarningLWXAllegany, Garrett30 min
Nov 30, 1:15 PM ESTSevere Thunderstorm WarningLWXWashington45 min

By county

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

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordThe radar archive20212023

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.