Alert archive / Maryland / Baltimore County

Weather alerts in Baltimore County, Maryland, 2013

192 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Baltimore County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts: 192
Warnings: 50
Watches: 38
Advisories: 53
Busiest month: June53 alerts
Busiest day: June 13, 201313 alerts

Over time

By month

Warning verification

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

2 of 5 tornado warnings covering Baltimore County in 2013 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 5 minutes after it went out.

Baltimore County, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	2	60%	3	100%	5 min
Severe thunderstorm warnings	20	14	30%	11	64%	26 min
Flash flood warnings	9	6	33%	4	100%	46 min

Each office's whole area, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Baltimore/Washington: tornado warnings	22	9	59%	21	62%	11 min
NWS Baltimore/Washington: severe thunderstorm warnings	210	141	33%	495	74%	21 min
NWS Baltimore/Washington: flash flood warnings	81	51	37%	124	78%	74 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	Lasted
Jan 11, 4:39 PM EST	Dense Fog Advisory	LWX	19 hr
Jan 12, 7:27 PM EST	Dense Fog Advisory	LWX	18 hr
Jan 13, 4:27 PM EST	Dense Fog Advisory	LWX	13 hr
Jan 15, 1:13 PM EST	Winter Weather Advisory	LWX	22 hr
Jan 23, 3:58 PM EST	Winter Weather Advisory	LWX	19 hr
Jan 24, 7:52 PM EST	Winter Weather Advisory	LWX	46 hr
Jan 27, 4:02 AM EST	Winter Weather Advisory	LWX	32 hr
Jan 29, 2:54 PM EST	Wind Advisory	LWX	47 hr
Jan 29, 2:55 PM EST	Coastal Flood Watch	LWX	14 hr
Jan 30, 4:07 AM EST	Flash Flood Watch	LWX	21 hr
Jan 30, 4:42 AM EST	Coastal Flood Advisory	LWX	32 hr
Jan 30, 12:54 PM EST	Mesoscale Discussion	SPC	96 min
Jan 30, 2:50 PM EST	Special Weather Statement	LWX	40 min
Jan 30, 6:31 PM EST	Tornado Watch	SPC	8 hr
Jan 30, 7:41 PM EST	Severe Thunderstorm Warning	LWX	49 min
Jan 30, 9:38 PM EST	Mesoscale Discussion	SPC	67 min
Jan 30, 9:39 PM EST	Areal Flood Warning	LWX	6 hr
Jan 30, 10:30 PM EST	Flash Flood Warning	LWX	6 hr
Jan 31, 2:54 AM EST	Winter Weather Advisory	LWX	36 hr
Feb 7, 3:09 PM EST	Winter Weather Advisory	LWX	19 hr
Feb 8, 1:26 PM EST	Wind Advisory	LWX	17 hr
Feb 22, 3:27 AM EST	Winter Weather Advisory	LWX	30 hr
Feb 25, 2:30 PM EST	Flood Watch	LWX	25 hr
Feb 26, 2:43 PM EST	Coastal Flood Advisory	LWX	21 hr
Mar 4, 3:11 AM EST	Winter Storm Watch	LWX	36 hr
Mar 4, 8:48 PM EST	Winter Storm Warning	LWX	42 hr
Mar 5, 9:12 PM EST	Coastal Flood Advisory	LWX	17 hr
Mar 6, 3:25 AM EST	Mesoscale Discussion	SPC	4 hr
Mar 6, 2:29 PM EST	Winter Weather Advisory	LWX	105 min
Mar 6, 4:27 PM EST	Wind Advisory	LWX	4 hr
Mar 9, 2:38 PM EST	Coastal Flood Advisory	LWX	3 days
Mar 10, 1:35 PM EDT	Coastal Flood Warning	LWX	21 hr
Mar 10, 3:31 PM EDT	Coastal Flood Watch	LWX	13 hr
Mar 11, 10:37 AM EDT	Coastal Flood Watch	LWX	10 hr
Mar 24, 4:26 AM EDT	Winter Weather Advisory	LWX	38 hr
Mar 25, 5:31 AM EDT	Mesoscale Discussion	SPC	6 hr
Apr 2, 3:32 PM EDT	Fire Weather Watch	LWX	13 hr
Apr 3, 4:30 AM EDT	Red Flag Warning	LWX	16 hr
Apr 10, 11:11 PM EDT	Mesoscale Discussion	SPC	94 min
Apr 12, 7:14 PM EDT	Special Weather Statement	LWX	31 min
Apr 12, 7:25 PM EDT	Special Weather Statement	LWX	35 min
Apr 12, 7:45 PM EDT	Special Weather Statement	LWX	30 min
Apr 12, 8:23 PM EDT	Special Weather Statement	LWX	22 min
Apr 19, 1:27 PM EDT	Mesoscale Discussion	SPC	63 min
Apr 19, 2:31 PM EDT	Tornado Watch	SPC	7 hr
Apr 19, 4:36 PM EDT	Mesoscale Discussion	SPC	114 min
Apr 19, 7:14 PM EDT	Special Weather Statement	LWX	31 min
Apr 19, 7:44 PM EDT	Severe Thunderstorm Warning	LWX	46 min
Apr 20, 10:28 PM EDT	Freeze Warning	LWX	10 hr
Apr 21, 2:46 PM EDT	Frost Advisory	LWX	18 hr
Apr 23, 11:22 PM EDT	Coastal Flood Advisory	LWX	23 hr
Apr 24, 6:59 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 29, 10:34 PM EDT	Coastal Flood Advisory	LWX	8 hr
May 8, 3:39 PM EDT	Severe Thunderstorm Warning	LWX	36 min
May 8, 4:21 PM EDT	Special Weather Statement	LWX	24 min
May 8, 11:27 PM EDT	Dense Fog Advisory	LWX	9 hr
May 11, 1:44 PM EDT	Mesoscale Discussion	SPC	91 min
May 13, 3:15 PM EDT	Frost Advisory	LWX	17 hr
May 23, 3:37 PM EDT	Mesoscale Discussion	SPC	53 min
May 23, 7:09 PM EDT	Flash Flood Warning	LWX	3 hr
Jun 2, 3:18 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 6, 2:18 PM EDT	Flash Flood Watch	LWX	30 hr
Jun 6, 5:49 PM EDT	Coastal Flood Advisory	LWX	17 hr
Jun 9, 9:09 PM EDT	Flash Flood Watch	LWX	26 hr
Jun 10, 12:56 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 2:02 PM EDT	Tornado Watch	SPC	10 hr
Jun 10, 2:51 PM EDT	Flash Flood Warning	LWX	3 hr
Jun 10, 3:24 PM EDT	Tornado Warning	LWX	36 min
Jun 10, 4:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 10, 4:39 PM EDT	Areal Flood Warning	LWX	6 hr
Jun 10, 6:49 PM EDT	Mesoscale Discussion	SPC	86 min
Jun 10, 6:56 PM EDT	Tornado Warning	LWX	34 min
Jun 10, 7:24 PM EDT	Tornado Warning	LWX	36 min
Jun 10, 8:04 PM EDT	Tornado Warning	LWX	26 min
Jun 10, 8:15 PM EDT	Flash Flood Warning	LWX	3 hr
Jun 10, 8:41 PM EDT	Mesoscale Discussion	SPC	64 min
Jun 10, 10:57 PM EDT	Areal Flood Warning	LWX	12 hr
Jun 12, 1:50 PM EDT	Flash Flood Watch	LWX	30 hr
Jun 13, 2:40 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 13, 3:58 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 13, 5:27 AM EDT	Mesoscale Discussion	SPC	2 hr
Jun 13, 8:07 AM EDT	Severe Thunderstorm Warning	LWX	38 min
Jun 13, 8:10 AM EDT	Mesoscale Discussion	SPC	95 min
Jun 13, 8:31 AM EDT	Flash Flood Warning	LWX	3 hr
Jun 13, 8:40 AM EDT	Severe Thunderstorm Warning	LWX	65 min
Jun 13, 9:03 AM EDT	Severe Thunderstorm Warning	LWX	42 min
Jun 13, 12:19 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 13, 3:58 PM EDT	Tornado Warning	LWX	32 min
Jun 13, 4:06 PM EDT	Severe Thunderstorm Warning	LWX	54 min
Jun 13, 4:22 PM EDT	Flash Flood Warning	LWX	3 hr
Jun 13, 5:50 PM EDT	Areal Flood Warning	LWX	4 hr
Jun 15, 3:26 AM EDT	Coastal Flood Advisory	LWX	11 hr
Jun 18, 3:54 AM EDT	Flash Flood Watch	LWX	13 hr
Jun 19, 9:29 PM EDT	Coastal Flood Advisory	LWX	7 hr
Jun 24, 1:48 PM EDT	Mesoscale Discussion	SPC	57 min
Jun 24, 2:44 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 24, 4:43 PM EDT	Mesoscale Discussion	SPC	62 min
Jun 25, 8:22 PM EDT	Mesoscale Discussion	SPC	83 min
Jun 25, 8:46 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 25, 9:55 PM EDT	Severe Thunderstorm Warning	LWX	65 min
Jun 26, 1:19 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 2:55 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 26, 4:38 PM EDT	Mesoscale Discussion	SPC	97 min
Jun 26, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	40 min
Jun 27, 1:04 PM EDT	Mesoscale Discussion	SPC	116 min
Jun 27, 1:58 PM EDT	Tornado Watch	SPC	7 hr
Jun 27, 3:57 PM EDT	Mesoscale Discussion	SPC	93 min
Jun 28, 1:02 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 28, 2:08 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 28, 3:09 PM EDT	Severe Thunderstorm Warning	LWX	36 min
Jun 28, 3:30 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 4:11 AM EDT	Flash Flood Watch	LWX	40 hr
Jun 30, 11:48 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 9:25 PM EDT	Coastal Flood Advisory	LWX	6 hr
Jul 2, 4:12 AM EDT	Flash Flood Watch	LWX	13 hr
Jul 7, 1:16 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 7, 3:19 PM EDT	Mesoscale Discussion	SPC	116 min
Jul 7, 5:04 PM EDT	Severe Thunderstorm Warning	LWX	41 min
Jul 7, 6:09 PM EDT	Mesoscale Discussion	SPC	66 min
Jul 12, 3:46 AM EDT	Flash Flood Watch	LWX	14 hr
Jul 15, 1:29 PM EDT	Heat Advisory	LWX	25 hr
Jul 17, 8:41 PM EDT	Heat Advisory	LWX	22 hr
Jul 18, 7:41 PM EDT	Heat Advisory	LWX	22 hr
Jul 19, 3:17 AM EDT	Excessive Heat Warning	LWX	15 hr
Jul 19, 5:59 PM EDT	Severe Thunderstorm Warning	LWX	61 min
Jul 19, 6:09 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 9:25 PM EDT	Heat Advisory	LWX	21 hr
Jul 20, 1:07 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 1:36 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 20, 8:15 PM EDT	Mesoscale Discussion	SPC	60 min
Jul 20, 9:23 PM EDT	Flash Flood Warning	LWX	3 hr
Jul 21, 4:35 PM EDT	Flash Flood Warning	LWX	3 hr
Jul 22, 1:18 PM EDT	Mesoscale Discussion	SPC	87 min
Jul 22, 11:38 PM EDT	Coastal Flood Advisory	LWX	11 hr
Jul 26, 6:57 PM EDT	Coastal Flood Advisory	LWX	18 hr
Jul 28, 10:31 PM EDT	Severe Thunderstorm Warning	LWX	44 min
Aug 6, 2:32 PM EDT	Coastal Flood Advisory	LWX	21 hr
Aug 7, 9:03 PM EDT	Severe Thunderstorm Warning	LWX	42 min
Aug 7, 9:24 PM EDT	Coastal Flood Advisory	LWX	12 hr
Aug 13, 1:36 AM EDT	Flash Flood Watch	LWX	10 hr
Aug 13, 5:46 AM EDT	Flash Flood Warning	LWX	3 hr
Aug 13, 5:51 AM EDT	Severe Thunderstorm Warning	LWX	54 min
Aug 20, 2:49 AM EDT	Dense Fog Advisory	LWX	7 hr
Aug 22, 2:26 PM EDT	Mesoscale Discussion	SPC	3 hr
Aug 30, 10:13 AM EDT	Coastal Flood Advisory	LWX	22 hr
Sep 12, 12:46 PM EDT	Severe Thunderstorm Warning	LWX	44 min
Sep 12, 1:29 PM EDT	Mesoscale Discussion	SPC	91 min
Sep 12, 1:56 PM EDT	Severe Thunderstorm Warning	LWX	49 min
Sep 12, 2:50 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 12, 4:24 PM EDT	Mesoscale Discussion	SPC	66 min
Sep 12, 4:27 PM EDT	Severe Thunderstorm Warning	LWX	48 min
Sep 21, 8:09 AM EDT	Coastal Flood Advisory	LWX	17 hr
Oct 6, 11:10 AM EDT	Coastal Flood Advisory	LWX	12 hr
Oct 6, 5:41 PM EDT	Coastal Flood Advisory	LWX	18 hr
Oct 7, 8:10 AM EDT	Mesoscale Discussion	SPC	2 hr
Oct 7, 8:56 AM EDT	Tornado Watch	SPC	8 hr
Oct 7, 10:36 AM EDT	Mesoscale Discussion	SPC	114 min
Oct 7, 12:01 PM EDT	Coastal Flood Advisory	LWX	13 hr
Oct 11, 6:42 AM EDT	Flood Watch	LWX	23 hr
Oct 11, 7:51 AM EDT	Areal Flood Warning	LWX	12 hr
Oct 12, 7:55 AM EDT	Coastal Flood Advisory	LWX	58 hr
Oct 17, 11:30 AM EDT	Coastal Flood Advisory	LWX	12 hr
Oct 23, 1:28 PM EDT	Freeze Watch	LWX	24 hr
Oct 24, 1:34 PM EDT	Freeze Warning	LWX	19 hr
Oct 25, 11:40 AM EDT	Freeze Warning	LWX	21 hr
Nov 1, 7:39 AM EDT	Severe Thunderstorm Warning	LWX	51 min
Nov 1, 8:29 AM EDT	Severe Thunderstorm Warning	LWX	46 min
Nov 1, 2:26 PM EDT	Coastal Flood Advisory	LWX	4 hr
Nov 10, 12:27 PM EST	Red Flag Warning	LWX	5 hr
Nov 17, 1:11 AM EST	Dense Fog Advisory	LWX	8 hr
Nov 18, 2:31 AM EST	Mesoscale Discussion	SPC	89 min
Nov 23, 11:05 AM EST	Fire Weather Watch	LWX	17 hr
Nov 24, 3:23 AM EST	Red Flag Warning	LWX	15 hr
Nov 25, 9:58 AM EST	Winter Weather Advisory	LWX	62 hr
Nov 27, 3:06 AM EST	Flood Watch	LWX	2 hr
Dec 5, 9:45 AM EST	Dense Fog Advisory	LWX	2 hr
Dec 6, 12:07 PM EST	Winter Storm Watch	LWX	32 hr
Dec 7, 5:55 PM EST	Winter Weather Advisory	LWX	37 hr
Dec 7, 8:34 PM EST	Winter Storm Warning	LWX	36 hr
Dec 8, 11:05 AM EST	Mesoscale Discussion	SPC	3 hr
Dec 8, 2:30 PM EST	Mesoscale Discussion	SPC	2 hr
Dec 9, 10:09 AM EST	Winter Storm Watch	LWX	4 hr
Dec 9, 2:29 PM EST	Winter Weather Advisory	LWX	21 hr
Dec 9, 5:22 PM EST	Dense Fog Advisory	LWX	10 hr
Dec 9, 8:54 PM EST	Winter Storm Warning	LWX	15 hr
Dec 10, 7:28 AM EST	Mesoscale Discussion	SPC	5 hr
Dec 13, 4:21 AM EST	Winter Storm Watch	LWX	10 hr
Dec 13, 2:33 PM EST	Winter Weather Advisory	LWX	34 hr
Dec 17, 1:42 PM EST	Winter Weather Advisory	LWX	3 hr
Dec 22, 3:37 AM EST	Severe Thunderstorm Watch	SPC	5 hr
Dec 22, 6:14 AM EST	Mesoscale Discussion	SPC	61 min
Dec 22, 3:14 PM EST	Flood Watch	LWX	17 hr

By product

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

Product	Alerts
Severe storms
Severe Thunderstorm Warning	20
Tornado Warning	5
Severe Thunderstorm Watch	10
Tornado Watch	5
Mesoscale Discussion	44
Special Weather Statement	7
Flooding
Areal Flood Warning	5
Flash Flood Warning	9
Flash Flood Watch	9
Flood Watch	4
Winter
Winter Storm Warning	3
Winter Storm Watch	4
Winter Weather Advisory	14
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	3
Freeze Watch	1
Frost Advisory	2
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	3
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	8
Coast and beach
Coastal Flood Warning	1
Coastal Flood Watch	3
Coastal Flood Advisory	22

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2012 2014

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.