Alert archive / Maryland / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Maryland, 2021

360 severe thunderstorm warnings in 2021. 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 2021. Tap one for its archive.

Severe Thunderstorm Warnings: 360
Busiest month: July109 severe thunderstorm warnings
Busiest day: August 13, 202130 severe thunderstorm warnings

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
Mar 28, 3:47 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	43 min
Mar 28, 4:23 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	52 min
Mar 28, 4:30 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery, Washington	45 min
Mar 28, 5:05 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard, Montgomery	40 min
Mar 28, 5:37 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	38 min
Mar 28, 5:43 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	47 min
Mar 28, 7:05 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	55 min
Apr 11, 7:43 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard	25 min
Apr 11, 9:01 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	44 min
Apr 11, 9:16 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	44 min
Apr 21, 12:43 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	33 min
Apr 21, 12:50 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	40 min
Apr 21, 1:09 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	30 min
Apr 21, 1:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	37 min
Apr 21, 2:19 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	41 min
Apr 30, 4:31 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery, Washington	29 min
Apr 30, 4:39 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Charles, Howard, Montgomery, Prince George's	36 min
Apr 30, 5:11 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	34 min
May 3, 4:00 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	26 min
May 3, 6:50 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	40 min
May 3, 8:49 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	26 min
May 4, 12:12 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	48 min
May 4, 4:55 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Montgomery, Prince George's	50 min
May 4, 5:27 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's	33 min
May 4, 5:49 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	56 min
May 4, 5:54 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	51 min
May 4, 6:32 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	43 min
May 4, 7:04 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	41 min
May 4, 7:07 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	38 min
May 4, 7:38 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	67 min
May 5, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Charles	50 min
May 5, 3:17 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	43 min
May 5, 3:39 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	61 min
May 5, 5:28 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	21 min
May 26, 2:51 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	39 min
May 26, 3:21 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	39 min
May 26, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	44 min
May 26, 3:40 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	28 min
May 26, 3:56 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	49 min
May 26, 3:59 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	9 min
May 26, 4:54 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	66 min
May 26, 5:00 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	45 min
May 26, 5:26 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, Howard, City of Baltimore	49 min
May 26, 5:52 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's	38 min
May 26, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	58 min
May 26, 6:51 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery, Washington	39 min
May 26, 7:21 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	39 min
May 26, 7:27 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	48 min
May 26, 7:53 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford, Howard, City of Baltimore	52 min
May 26, 7:59 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	46 min
May 26, 8:21 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	39 min
May 26, 8:53 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	52 min
May 26, 9:19 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Charles, Prince George's	41 min
May 26, 9:35 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	27 min
May 28, 5:46 PM EDT	Severe Thunderstorm Warning	LWX	Charles	44 min
May 28, 6:15 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	34 min
Jun 2, 6:00 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	45 min
Jun 2, 6:27 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	48 min
Jun 3, 3:14 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	46 min
Jun 3, 3:47 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	43 min
Jun 3, 3:50 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	40 min
Jun 3, 4:12 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore	33 min
Jun 3, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard, City of Baltimore	40 min
Jun 3, 4:43 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford, City of Baltimore	47 min
Jun 3, 4:54 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	36 min
Jun 3, 5:26 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	49 min
Jun 3, 5:27 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery	33 min
Jun 3, 6:03 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	28 min
Jun 3, 6:14 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	34 min
Jun 3, 6:36 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	39 min
Jun 4, 12:36 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	39 min
Jun 4, 12:50 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	55 min
Jun 4, 1:36 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	39 min
Jun 4, 2:17 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	43 min
Jun 4, 2:50 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	40 min
Jun 4, 2:55 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	30 min
Jun 4, 3:19 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	41 min
Jun 4, 3:54 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	51 min
Jun 4, 4:44 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	22 min
Jun 8, 3:48 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	42 min
Jun 9, 4:09 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	51 min
Jun 9, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	27 min
Jun 9, 5:14 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	46 min
Jun 9, 6:09 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	30 min
Jun 10, 2:57 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	25 min
Jun 10, 2:59 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	46 min
Jun 13, 12:51 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	26 min
Jun 14, 5:53 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	38 min
Jun 14, 9:02 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, City of Baltimore	43 min
Jun 14, 9:22 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Howard, Montgomery	38 min
Jun 14, 9:29 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, City of Baltimore	46 min
Jun 14, 9:55 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	50 min
Jun 14, 9:56 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	28 min
Jun 14, 10:12 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford	33 min
Jun 14, 10:16 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	44 min
Jun 14, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	67 min
Jun 14, 10:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	45 min
Jun 14, 11:03 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	57 min
Jun 14, 11:12 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	63 min
Jun 14, 11:23 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	24 min
Jun 14, 11:42 PM EDT	Severe Thunderstorm Warning	PHI	Kent	63 min
Jun 14, 11:51 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	54 min
Jun 14, 11:54 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	66 min
Jun 20, 8:11 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	26 min
Jun 21, 2:15 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	45 min
Jun 21, 3:33 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	42 min
Jun 21, 3:59 PM EDT	Severe Thunderstorm Warning	LWX	Washington	46 min
Jun 21, 4:09 PM EDT	Severe Thunderstorm Warning	LWX	Washington	51 min
Jun 21, 4:25 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	50 min
Jun 21, 4:26 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	49 min
Jun 21, 4:47 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	28 min
Jun 21, 5:02 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	43 min
Jun 21, 5:10 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	50 min
Jun 21, 5:44 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's and 1 more	46 min
Jun 21, 6:14 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	46 min
Jun 21, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, Howard, City of Baltimore	47 min
Jun 21, 6:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	45 min
Jun 21, 6:46 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	29 min
Jun 21, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	58 min
Jun 21, 6:51 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	39 min
Jun 21, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	47 min
Jun 30, 4:39 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	36 min
Jun 30, 4:55 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	21 min
Jul 1, 1:03 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	42 min
Jul 1, 1:44 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Montgomery, Prince George's	46 min
Jul 1, 2:10 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery	50 min
Jul 1, 2:18 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	42 min
Jul 1, 2:28 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	47 min
Jul 1, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	35 min
Jul 1, 2:41 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	64 min
Jul 1, 2:43 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Montgomery, Prince George's	47 min
Jul 1, 3:06 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	24 min
Jul 1, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	48 min
Jul 1, 3:20 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	55 min
Jul 1, 3:26 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	38 min
Jul 1, 3:51 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Wicomico	54 min
Jul 1, 3:56 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	49 min
Jul 1, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	52 min
Jul 1, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	52 min
Jul 1, 4:15 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	30 min
Jul 1, 4:32 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	43 min
Jul 1, 5:21 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	39 min
Jul 1, 5:29 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico, Worcester	29 min
Jul 1, 8:47 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	43 min
Jul 1, 9:11 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	49 min
Jul 1, 10:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	21 min
Jul 7, 4:09 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	36 min
Jul 7, 4:47 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard	43 min
Jul 8, 2:36 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, Prince George's, City of Baltimore	39 min
Jul 9, 4:56 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	49 min
Jul 9, 5:26 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	49 min
Jul 9, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's	45 min
Jul 9, 5:54 PM EDT	Severe Thunderstorm Warning	LWX	Calvert	51 min
Jul 9, 6:03 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	57 min
Jul 9, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	31 min
Jul 9, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	41 min
Jul 9, 6:43 PM EDT	Severe Thunderstorm Warning	LWX	Calvert	32 min
Jul 9, 6:55 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	50 min
Jul 11, 7:58 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	47 min
Jul 11, 8:28 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	47 min
Jul 12, 2:43 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	47 min
Jul 12, 3:15 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	22 min
Jul 12, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	47 min
Jul 12, 7:01 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	20 min
Jul 12, 7:08 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	52 min
Jul 12, 7:23 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	52 min
Jul 13, 4:33 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	42 min
Jul 13, 5:14 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	46 min
Jul 13, 6:15 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	34 min
Jul 13, 6:55 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	19 min
Jul 14, 4:41 PM EDT	Severe Thunderstorm Warning	LWX	Charles	49 min
Jul 14, 5:14 PM EDT	Severe Thunderstorm Warning	LWX	Charles	34 min
Jul 14, 5:24 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	51 min
Jul 14, 5:46 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	44 min
Jul 14, 6:03 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	57 min
Jul 14, 7:22 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	28 min
Jul 17, 1:29 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard	46 min
Jul 17, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford, City of Baltimore	50 min
Jul 17, 2:59 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	31 min
Jul 17, 3:24 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard	24 min
Jul 17, 3:27 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	63 min
Jul 17, 3:30 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	45 min
Jul 17, 3:50 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery	40 min
Jul 17, 3:59 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	46 min
Jul 17, 4:12 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	36 min
Jul 17, 4:28 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	62 min
Jul 17, 5:20 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	40 min
Jul 17, 5:44 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	46 min
Jul 17, 6:35 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	40 min
Jul 17, 6:45 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	30 min
Jul 17, 7:11 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	49 min
Jul 17, 7:55 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	27 min
Jul 17, 7:59 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	46 min
Jul 21, 1:14 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	46 min
Jul 21, 1:26 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	49 min
Jul 21, 1:27 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	21 min
Jul 21, 1:46 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	44 min
Jul 21, 1:59 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	23 min
Jul 21, 2:31 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	44 min
Jul 21, 3:46 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	44 min
Jul 21, 3:48 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	26 min
Jul 21, 3:49 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	15 min
Jul 21, 4:16 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	44 min
Jul 21, 4:25 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	30 min
Jul 21, 5:05 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	40 min
Jul 26, 1:05 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	40 min
Jul 26, 2:52 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	38 min
Jul 26, 3:21 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert	24 min
Jul 26, 6:46 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	44 min
Jul 26, 7:07 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	23 min
Jul 26, 7:30 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	14 min
Jul 26, 7:36 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	24 min
Jul 26, 8:01 PM EDT	Severe Thunderstorm Warning	LWX	Charles	44 min
Jul 26, 8:24 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	24 min
Jul 26, 8:46 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's, Saint Mary's	44 min
Jul 26, 9:07 PM EDT	Severe Thunderstorm Warning	LWX	Charles	38 min
Jul 28, 4:37 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	38 min
Jul 28, 4:45 PM EDT	Severe Thunderstorm Warning	LWX	Calvert	45 min
Jul 28, 5:05 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	40 min
Jul 28, 9:30 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	45 min
Jul 28, 9:48 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	42 min
Jul 29, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	45 min
Jul 29, 12:12 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	29 min
Jul 29, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	44 min
Jul 29, 4:00 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	45 min
Jul 29, 4:16 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard	44 min
Jul 29, 4:40 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	50 min
Jul 29, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	55 min
Jul 29, 4:59 PM EDT	Severe Thunderstorm Warning	LWX	Charles	46 min
Jul 29, 5:01 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	29 min
Jul 29, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	40 min
Jul 29, 5:43 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	17 min
Aug 5, 4:58 PM EDT	Severe Thunderstorm Warning	LWX	Washington	29 min
Aug 9, 3:52 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	19 min
Aug 9, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	40 min
Aug 9, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	20 min
Aug 9, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	41 min
Aug 9, 6:23 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	52 min
Aug 9, 6:49 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	22 min
Aug 9, 7:28 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	29 min
Aug 10, 4:34 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	41 min
Aug 10, 4:49 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	41 min
Aug 10, 5:08 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	18 min
Aug 10, 5:25 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	50 min
Aug 10, 5:34 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Howard, Montgomery	29 min
Aug 10, 5:53 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	29 min
Aug 10, 5:55 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	27 min
Aug 10, 6:14 PM EDT	Severe Thunderstorm Warning	LWX	Carroll	26 min
Aug 10, 6:29 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	46 min
Aug 10, 6:38 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	52 min
Aug 10, 6:55 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	50 min
Aug 10, 7:01 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	24 min
Aug 10, 7:04 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	41 min
Aug 10, 7:28 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	62 min
Aug 10, 7:51 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	30 min
Aug 11, 2:51 PM EDT	Severe Thunderstorm Warning	LWX	Washington	39 min
Aug 11, 2:59 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	46 min
Aug 11, 3:15 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Frederick, Washington	45 min
Aug 11, 3:42 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Montgomery	48 min
Aug 11, 4:06 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard, Montgomery	39 min
Aug 11, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	40 min
Aug 11, 4:34 PM EDT	Severe Thunderstorm Warning	LWX	Washington	41 min
Aug 11, 4:45 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Montgomery, Prince George's	30 min
Aug 11, 5:01 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	44 min
Aug 11, 5:32 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, Howard, City of Baltimore	43 min
Aug 11, 6:14 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	27 min
Aug 13, 1:43 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	47 min
Aug 13, 2:38 PM EDT	Severe Thunderstorm Warning	LWX	Washington	35 min
Aug 13, 3:36 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	39 min
Aug 13, 3:50 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	40 min
Aug 13, 4:05 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	40 min
Aug 13, 4:30 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Carroll, Howard, Montgomery	45 min
Aug 13, 4:42 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	48 min
Aug 13, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	29 min
Aug 13, 4:49 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore	41 min
Aug 13, 4:49 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	41 min
Aug 13, 4:59 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	46 min
Aug 13, 5:11 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	49 min
Aug 13, 5:20 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	40 min
Aug 13, 5:22 PM EDT	Severe Thunderstorm Warning	LWX	Harford	38 min
Aug 13, 5:25 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	50 min
Aug 13, 5:35 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Anne Arundel, Prince George's	25 min
Aug 13, 5:52 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	24 min
Aug 13, 5:56 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Montgomery, Prince George's	49 min
Aug 13, 6:01 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	44 min
Aug 13, 6:05 PM EDT	Severe Thunderstorm Warning	LWX	Charles	40 min
Aug 13, 6:15 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	45 min
Aug 13, 6:29 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	25 min
Aug 13, 6:33 PM EDT	Severe Thunderstorm Warning	LWX	Charles	42 min
Aug 13, 6:45 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	30 min
Aug 13, 7:07 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	39 min
Aug 13, 7:11 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	34 min
Aug 13, 7:12 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	33 min
Aug 13, 7:23 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	52 min
Aug 13, 7:41 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	21 min
Aug 13, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	47 min
Aug 14, 10:28 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's	47 min
Aug 18, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	14 min
Aug 18, 5:13 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	47 min
Aug 22, 1:14 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	46 min
Aug 22, 1:51 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	39 min
Aug 22, 4:41 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	49 min
Aug 25, 4:21 PM EDT	Severe Thunderstorm Warning	LWX	Washington	39 min
Aug 25, 9:20 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	40 min
Aug 26, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	44 min
Aug 26, 4:03 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	42 min
Aug 26, 5:49 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	41 min
Aug 27, 2:35 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	40 min
Aug 27, 3:05 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	40 min
Aug 27, 3:25 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	30 min
Aug 27, 3:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Montgomery, Prince George's	19 min
Aug 27, 4:14 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	46 min
Aug 27, 4:59 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	33 min
Aug 27, 5:06 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	20 min
Aug 27, 5:21 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	39 min
Aug 27, 5:52 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	53 min
Aug 27, 6:10 PM EDT	Severe Thunderstorm Warning	LWX	Charles	32 min
Aug 27, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	29 min
Aug 27, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	47 min
Aug 27, 7:10 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	65 min
Aug 27, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	34 min
Aug 27, 9:35 PM EDT	Severe Thunderstorm Warning	LWX	Charles	40 min
Aug 27, 10:08 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	52 min
Aug 28, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Washington	40 min
Aug 28, 7:18 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	42 min
Aug 30, 4:54 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	51 min
Aug 30, 6:04 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	25 min
Sep 1, 3:24 AM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	51 min
Sep 1, 4:00 AM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	60 min
Sep 1, 4:50 AM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	40 min
Sep 1, 2:40 PM EDT	Severe Thunderstorm Warning Considerable damage threat	AKQ	Dorchester, Somerset, Wicomico	50 min
Sep 1, 3:16 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	44 min
Sep 1, 3:56 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	49 min
Sep 1, 5:04 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Wicomico	41 min
Sep 1, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	44 min
Sep 1, 6:53 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	52 min
Sep 1, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	63 min
Sep 1, 7:29 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	46 min
Sep 8, 3:52 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	30 min
Sep 8, 9:11 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	64 min
Sep 8, 9:21 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	54 min
Sep 9, 12:17 AM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	43 min
Sep 15, 3:45 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	16 min
Sep 15, 5:15 PM EDT	Severe Thunderstorm Warning	LWX	Washington	30 min
Sep 15, 5:42 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	48 min
Sep 15, 5:52 PM EDT	Severe Thunderstorm Warning	LWX	Washington	38 min
Sep 15, 6:23 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	52 min
Sep 15, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	34 min
Sep 15, 9:38 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	52 min
Sep 22, 4:22 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's, Saint Mary's	38 min
Sep 22, 5:39 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's	51 min
Sep 22, 6:20 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	25 min
Sep 23, 7:56 AM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	22 min
Sep 23, 9:27 AM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	78 min
Sep 23, 9:46 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	44 min
Sep 23, 10:35 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	40 min
Oct 5, 4:42 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	48 min
Oct 16, 3:21 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	28 min
Oct 25, 5:44 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	46 min
Oct 25, 6:35 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	40 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 now Tornadoes on record The radar archive 2020 2022

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.