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

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	274	198	28%	589	80%	23 min

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Wakefield, VA: severe thunderstorm warnings	267	196	27%	417	92%	21 min
NWS Baltimore/Washington: severe thunderstorm warnings	413	300	27%	1,177	78%	21 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	170	93	45%	306	90%	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.

Issued	Product	Office	Counties	Lasted
Jan 16, 10:43 PM EST	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	47 min
Mar 7, 5:02 PM EST	Severe Thunderstorm Warning	LWX	Allegany, Garrett	43 min
Mar 7, 7:24 PM EST	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Harford, Washington	51 min
Mar 31, 1:24 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	36 min
Mar 31, 1:34 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	41 min
Mar 31, 2:50 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	40 min
Mar 31, 3:26 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	25 min
Mar 31, 3:48 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	27 min
Mar 31, 5:56 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	26 min
Mar 31, 7:04 PM EDT	Severe Thunderstorm Warning	LWX	Carroll	41 min
Mar 31, 7:13 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	47 min
Mar 31, 7:42 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	36 min
Mar 31, 8:10 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	20 min
Mar 31, 8:18 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery, Prince George's	42 min
Mar 31, 9:50 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	19 min
May 1, 8:43 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	47 min
May 16, 4:07 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Charles, Prince George's	38 min
May 16, 4:35 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	40 min
May 16, 5:11 PM EDT	Severe Thunderstorm Warning Considerable damage threat	AKQ	Dorchester, Wicomico	64 min
May 16, 5:20 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	40 min
May 16, 6:11 PM EDT	Severe Thunderstorm Warning Considerable damage threat	AKQ	Dorchester, Wicomico, Worcester	64 min
May 16, 7:35 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	40 min
May 20, 11:06 AM EDT	Severe Thunderstorm Warning	LWX	Garrett	39 min
May 20, 11:21 AM EDT	Severe Thunderstorm Warning	LWX	Garrett	39 min
May 20, 11:29 AM EDT	Severe Thunderstorm Warning	LWX	Allegany	46 min
May 20, 11:41 AM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	29 min
May 20, 12:09 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett, Washington	51 min
May 20, 12:53 PM EDT	Severe Thunderstorm Warning	LWX	Washington	17 min
May 22, 3:35 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	40 min
May 22, 3:58 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	30 min
May 22, 4:11 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	49 min
May 22, 4:21 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	27 min
May 22, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's, City of Baltimore	44 min
May 22, 5:02 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	28 min
May 22, 5:09 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	51 min
May 22, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	45 min
May 22, 5:36 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Cecil, Harford, Howard, City of Baltimore	39 min
May 22, 5:56 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	49 min
May 22, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	41 min
May 22, 6:16 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	44 min
May 22, 6:37 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	12 min
May 22, 7:04 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Charles, Frederick, Howard, Montgomery and 1 more	56 min
May 22, 7:26 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Calvert, Charles, Harford, Howard and 3 more	64 min
May 22, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	41 min
May 22, 8:28 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	32 min
May 22, 8:51 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	24 min
May 27, 11:43 AM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	47 min
May 27, 11:47 AM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	43 min
May 27, 11:59 AM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	46 min
May 27, 12:10 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	50 min
May 27, 12:27 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's	48 min
May 27, 12:29 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's and 1 more	46 min
May 27, 12:36 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	39 min
May 27, 12:45 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	45 min
May 27, 1:10 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	50 min
May 27, 1:15 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	45 min
May 27, 1:33 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	42 min
May 27, 1:43 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	47 min
May 27, 1:44 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	46 min
May 27, 7:51 PM EDT	Severe Thunderstorm Warning	LWX	Charles	39 min
May 27, 8:50 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	30 min
May 27, 9:05 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	40 min
Jun 2, 3:07 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	38 min
Jun 2, 3:22 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	38 min
Jun 2, 3:25 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	50 min
Jun 2, 3:27 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	22 min
Jun 2, 3:52 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	38 min
Jun 2, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	51 min
Jun 2, 3:57 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	20 min
Jun 2, 4:02 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	43 min
Jun 2, 4:18 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	42 min
Jun 2, 4:43 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	47 min
Jun 2, 4:45 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	47 min
Jun 2, 5:14 PM EDT	Severe Thunderstorm Warning	LWX	Charles	46 min
Jun 2, 5:31 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	44 min
Jun 2, 5:31 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	29 min
Jun 2, 5:43 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	47 min
Jun 2, 5:58 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	47 min
Jun 2, 6:04 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	41 min
Jun 2, 6:12 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	48 min
Jun 2, 6:44 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	32 min
Jun 2, 7:03 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	27 min
Jun 2, 7:23 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	67 min
Jun 8, 5:20 PM EDT	Severe Thunderstorm Warning	LWX	Washington	28 min
Jun 8, 6:13 PM EDT	Severe Thunderstorm Warning	LWX	Charles	47 min
Jun 8, 6:25 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Prince George's	37 min
Jun 8, 6:50 PM EDT	Severe Thunderstorm Warning	LWX	Charles	40 min
Jun 8, 6:58 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery	26 min
Jun 8, 7:09 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	26 min
Jun 8, 8:17 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	43 min
Jun 8, 8:58 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	47 min
Jun 8, 9:07 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Calvert	27 min
Jun 8, 9:22 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	38 min
Jun 8, 9:23 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	21 min
Jun 8, 9:41 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Garrett	49 min
Jun 8, 11:11 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	37 min
Jun 12, 12:46 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	44 min
Jun 13, 6:31 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	44 min
Jun 13, 6:57 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	48 min
Jun 13, 9:02 PM EDT	Severe Thunderstorm Warning	LWX	Charles	43 min
Jun 14, 4:01 AM EDT	Severe Thunderstorm Warning	LWX	Washington	44 min
Jun 14, 7:27 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	28 min
Jun 14, 9:52 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	38 min
Jun 14, 10:08 AM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Wicomico	52 min
Jun 14, 10:30 AM EDT	Severe Thunderstorm Warning	PHI	Caroline	45 min
Jun 14, 10:35 AM EDT	Severe Thunderstorm Warning	AKQ	Wicomico	40 min
Jun 14, 11:14 AM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	46 min
Jun 14, 11:54 AM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	47 min
Jun 16, 3:24 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	31 min
Jun 16, 3:28 PM EDT	Severe Thunderstorm Warning	LWX	Washington	23 min
Jun 16, 4:32 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	20 min
Jun 17, 6:01 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	44 min
Jun 17, 6:13 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	47 min
Jun 17, 7:24 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Worcester	51 min
Jun 17, 8:07 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	23 min
Jun 22, 1:58 PM EDT	Severe Thunderstorm Warning	LWX	Charles	62 min
Jun 22, 2:56 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery, Washington	34 min
Jun 22, 3:27 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	1 min
Jun 22, 3:37 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	38 min
Jun 22, 6:26 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	49 min
Jun 22, 7:07 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	33 min
Jun 22, 7:29 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	46 min
Jul 1, 12:58 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	47 min
Jul 1, 1:33 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	23 min
Jul 1, 2:11 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	23 min
Jul 1, 2:26 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	32 min
Jul 1, 2:33 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	42 min
Jul 1, 2:57 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard	29 min
Jul 1, 2:57 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	48 min
Jul 1, 3:42 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	32 min
Jul 2, 3:32 AM EDT	Severe Thunderstorm Warning	LWX	Garrett	15 min
Jul 2, 3:43 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	47 min
Jul 2, 4:15 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	4 min
Jul 2, 4:19 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	18 min
Jul 2, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	26 min
Jul 2, 5:32 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	29 min
Jul 2, 5:36 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	39 min
Jul 2, 7:05 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	40 min
Jul 2, 7:33 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	18 min
Jul 2, 9:13 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	47 min
Jul 2, 9:14 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	28 min
Jul 2, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	22 min
Jul 3, 1:17 AM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	43 min
Jul 5, 2:33 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	57 min
Jul 5, 4:55 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery, Prince George's	29 min
Jul 5, 5:18 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	57 min
Jul 5, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	33 min
Jul 7, 12:25 AM EDT	Severe Thunderstorm Warning	LWX	Charles	39 min
Jul 12, 1:52 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	38 min
Jul 12, 2:25 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	65 min
Jul 12, 2:56 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	29 min
Jul 12, 3:00 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	45 min
Jul 12, 3:08 PM EDT	Severe Thunderstorm Warning	LWX	Garrett	52 min
Jul 12, 3:22 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	38 min
Jul 12, 3:48 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery, Washington	42 min
Jul 12, 4:20 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford	40 min
Jul 12, 4:27 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	48 min
Jul 12, 4:35 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford, City of Baltimore	25 min
Jul 12, 4:44 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick	46 min
Jul 12, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford, City of Baltimore	55 min
Jul 12, 5:04 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	41 min
Jul 12, 5:38 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	37 min
Jul 12, 5:56 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	64 min
Jul 12, 6:00 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	45 min
Jul 12, 6:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Kent, Queen Anne's, Talbot	39 min
Jul 12, 6:40 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Anne Arundel	19 min
Jul 12, 7:12 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	48 min
Jul 12, 7:37 PM EDT	Severe Thunderstorm Warning Destructive damage threat	PHI	Caroline	23 min
Jul 12, 7:40 PM EDT	Severe Thunderstorm Warning	LWX	Prince George's	50 min
Jul 12, 8:06 PM EDT	Severe Thunderstorm Warning	LWX	Charles	39 min
Jul 12, 8:09 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline	21 min
Jul 12, 8:29 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	46 min
Jul 12, 9:03 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	42 min
Jul 12, 9:16 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico	44 min
Jul 12, 9:57 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico, Worcester	48 min
Jul 13, 12:26 AM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	49 min
Jul 14, 4:19 PM EDT	Severe Thunderstorm Warning	LWX	Charles	41 min
Jul 16, 2:43 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	32 min
Jul 16, 3:15 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	45 min
Jul 16, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	23 min
Jul 16, 4:53 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	52 min
Jul 16, 5:36 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	39 min
Jul 17, 6:04 PM EDT	Severe Thunderstorm Warning	LWX	Charles	41 min
Jul 18, 2:30 PM EDT	Severe Thunderstorm Warning	LWX	Washington	45 min
Jul 18, 3:06 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	39 min
Jul 18, 3:38 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery	52 min
Jul 18, 3:44 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	34 min
Jul 18, 4:22 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Harford, City of Baltimore	38 min
Jul 18, 4:56 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Cecil, Harford	49 min
Jul 18, 5:38 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	19 min
Jul 18, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	63 min
Jul 18, 6:03 PM EDT	Severe Thunderstorm Warning	LWX	Cecil	15 min
Jul 18, 6:44 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	61 min
Jul 18, 6:57 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	23 min
Jul 18, 7:38 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Queen Anne's	67 min
Jul 21, 2:37 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's	38 min
Jul 21, 3:13 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	47 min
Jul 21, 3:16 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	44 min
Jul 21, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	24 min
Jul 21, 4:02 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester	43 min
Jul 21, 4:34 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset	23 min
Jul 21, 5:15 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	45 min
Jul 21, 5:39 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	36 min
Jul 23, 3:56 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	64 min
Jul 23, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	46 min
Jul 23, 5:17 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	43 min
Jul 23, 5:55 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	39 min
Jul 23, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Washington	41 min
Jul 23, 6:51 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	24 min
Jul 25, 2:26 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	49 min
Jul 25, 3:42 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	48 min
Jul 25, 4:11 PM EDT	Severe Thunderstorm Warning	LWX	Charles	49 min
Jul 25, 5:15 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Saint Mary's	60 min
Jul 25, 5:56 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	64 min
Jul 25, 6:56 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico, Worcester	49 min
Jul 25, 7:30 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	45 min
Jul 28, 5:49 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Somerset, Wicomico, Worcester	41 min
Jul 28, 6:23 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	42 min
Aug 1, 9:56 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	49 min
Aug 1, 10:37 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	38 min
Aug 2, 1:19 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	41 min
Aug 4, 2:35 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	28 min
Aug 4, 3:00 PM EDT	Severe Thunderstorm Warning	LWX	Washington	45 min
Aug 4, 3:23 PM EDT	Severe Thunderstorm Warning	LWX	Washington	52 min
Aug 4, 4:07 PM EDT	Severe Thunderstorm Warning	LWX	Washington	25 min
Aug 4, 5:19 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery	41 min
Aug 4, 5:24 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard, Montgomery, Prince George's	51 min
Aug 4, 5:42 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	48 min
Aug 4, 5:58 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, Prince George's, City of Baltimore	47 min
Aug 4, 6:09 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	26 min
Aug 4, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	41 min
Aug 4, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	47 min
Aug 4, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	40 min
Aug 4, 6:53 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	52 min
Aug 4, 7:13 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	47 min
Aug 4, 7:15 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's	45 min
Aug 4, 7:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	51 min
Aug 4, 7:41 PM EDT	Severe Thunderstorm Warning	PHI	Kent	34 min
Aug 4, 8:06 PM EDT	Severe Thunderstorm Warning Considerable damage threat	PHI	Caroline, Queen Anne's, Talbot	39 min
Aug 4, 8:12 PM EDT	Severe Thunderstorm Warning	AKQ	Dorchester, Wicomico	48 min
Aug 4, 8:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	38 min
Aug 5, 12:37 AM EDT	Severe Thunderstorm Warning	LWX	Howard, Montgomery, Prince George's	17 min
Aug 5, 4:13 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico	36 min
Aug 5, 4:45 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	30 min
Aug 5, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	Charles	38 min
Aug 5, 5:37 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	38 min
Aug 5, 5:44 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	31 min
Aug 5, 6:29 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	31 min
Aug 9, 7:35 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	40 min
Aug 10, 3:51 PM EDT	Severe Thunderstorm Warning	LWX	Charles	39 min
Aug 10, 4:28 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	30 min
Aug 10, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	Charles	26 min
Aug 10, 5:04 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	56 min
Aug 10, 5:45 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	45 min
Aug 10, 6:14 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	29 min
Aug 26, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	50 min
Aug 30, 4:13 PM EDT	Severe Thunderstorm Warning	LWX	Charles	32 min
Aug 30, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	Charles	23 min
Aug 30, 7:55 PM EDT	Severe Thunderstorm Warning	AKQ	Somerset, Wicomico, Worcester	35 min
Sep 12, 4:28 PM EDT	Severe Thunderstorm Warning	LWX	Charles	47 min
Sep 12, 6:28 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	32 min
Sep 12, 7:45 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	45 min
Sep 12, 8:27 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	28 min
Sep 12, 10:02 PM EDT	Severe Thunderstorm Warning	AKQ	Worcester	32 min
Sep 25, 10:58 AM EDT	Severe Thunderstorm Warning	LWX	Allegany, Garrett	36 min
Sep 25, 11:20 AM EDT	Severe Thunderstorm Warning	LWX	Allegany	40 min
Sep 25, 1:39 PM EDT	Severe Thunderstorm Warning Considerable damage threat	LWX	Frederick, Montgomery, Washington	51 min
Sep 25, 1:53 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Cecil, Harford	41 min
Sep 25, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	29 min
Sep 25, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	35 min
Sep 25, 5:25 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	35 min
Oct 17, 8:04 PM EDT	Severe Thunderstorm Warning	AKQ	Wicomico, Worcester	37 min
Nov 30, 12:00 PM EST	Severe Thunderstorm Warning	LWX	Allegany, Garrett	30 min
Nov 30, 1:15 PM EST	Severe Thunderstorm Warning	LWX	Washington	45 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 2021 2023

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.