Alert archive / Maryland / Somerset County

Weather alerts in Somerset County, Maryland, 2021

112 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Somerset County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 112
Warnings: 18
Watches: 18
Advisories: 28
Busiest month: July25 alerts
Busiest day: September 1, 20219 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Somerset County in 2021 had a tornado report inside them.

Somerset County, 2021

	Warnings	With a report	False alarm ratio
Tornado warnings	1	0	100%
Severe thunderstorm warnings	11	3	73%
Flash flood warnings	0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Wakefield, VA: tornado warnings	39	8	79%	13	62%	15 min
NWS Wakefield, VA: severe thunderstorm warnings	239	170	29%	321	91%	21 min
NWS Wakefield, VA: flash flood warnings	63	49	22%	114	99%	66 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 27, 9:03 AM EST	Wind Advisory	AKQ	33 hr
Jan 30, 4:34 AM EST	Winter Weather Advisory	AKQ	38 hr
Jan 31, 2:05 PM EST	Coastal Flood Advisory	AKQ	16 hr
Feb 2, 6:53 AM EST	Coastal Flood Statement	AKQ	24 hr
Feb 5, 3:17 PM EST	Winter Storm Watch	AKQ	12 hr
Feb 10, 3:45 AM EST	Winter Storm Watch	AKQ	24 hr
Feb 11, 3:39 AM EST	Winter Weather Advisory	AKQ	3 days
Feb 17, 3:10 PM EST	Winter Weather Advisory	AKQ	45 hr
Mar 13, 7:09 PM EST	Fire Weather Watch	AKQ	8 hr
Mar 14, 4:05 AM EDT	Red Flag Warning	AKQ	16 hr
Mar 19, 4:32 AM EDT	Coastal Flood Advisory	AKQ	29 hr
Mar 25, 3:02 PM EDT	Wind Advisory	AKQ	24 hr
Mar 28, 1:24 PM EDT	Mesoscale Discussion	SPC	2 hr
Apr 1, 2:53 AM EDT	Special Weather Statement	AKQ	37 min
Apr 12, 2:54 PM EDT	Coastal Flood Advisory	AKQ	14 hr
Apr 13, 3:44 PM EDT	Coastal Flood Advisory	AKQ	14 hr
Apr 21, 12:22 PM EDT	Mesoscale Discussion	SPC	113 min
Apr 21, 12:28 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 21, 1:57 PM EDT	Special Weather Statement	AKQ	48 min
Apr 21, 2:19 PM EDT	Severe Thunderstorm Warning	AKQ	41 min
Apr 22, 12:04 PM EDT	Frost Advisory	AKQ	20 hr
Apr 29, 2:37 PM EDT	Wind Advisory	AKQ	34 hr
Apr 30, 12:24 AM EDT	Special Weather Statement	AKQ	66 min
Apr 30, 1:22 AM EDT	Special Weather Statement	AKQ	38 min
May 4, 7:07 PM EDT	Severe Thunderstorm Warning	AKQ	38 min
May 4, 7:38 PM EDT	Severe Thunderstorm Warning	AKQ	67 min
May 5, 1:03 PM EDT	Mesoscale Discussion	SPC	2 hr
May 5, 4:36 PM EDT	Special Weather Statement	AKQ	39 min
May 9, 3:48 PM EDT	Coastal Flood Statement	AKQ	14 hr
May 26, 1:21 PM EDT	Mesoscale Discussion	SPC	84 min
May 26, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
May 28, 7:18 PM EDT	Mesoscale Discussion	SPC	87 min
Jun 3, 2:48 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 4, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 4, 3:40 PM EDT	Special Weather Statement	AKQ	65 min
Jun 4, 4:12 PM EDT	Mesoscale Discussion	SPC	93 min
Jun 10, 10:14 AM EDT	Flash Flood Watch	AKQ	10 hr
Jun 11, 3:22 PM EDT	Coastal Flood Statement	AKQ	14 hr
Jun 12, 3:16 PM EDT	Coastal Flood Statement	AKQ	15 hr
Jun 14, 6:41 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 14, 7:29 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 14, 10:09 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 11:37 AM EDT	Special Weather Statement	AKQ	68 min
Jul 1, 11:45 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 1, 4:16 PM EDT	Mesoscale Discussion	SPC	89 min
Jul 1, 5:17 PM EDT	Special Weather Statement	AKQ	58 min
Jul 1, 5:21 PM EDT	Severe Thunderstorm Warning	AKQ	39 min
Jul 1, 5:29 PM EDT	Severe Thunderstorm Warning	AKQ	29 min
Jul 1, 6:00 PM EDT	Special Weather Statement	AKQ	60 min
Jul 2, 6:03 AM EDT	Areal Flood Advisory	AKQ	3 hr
Jul 3, 8:23 PM EDT	Special Weather Statement	AKQ	52 min
Jul 7, 5:32 AM EDT	Tropical Storm Watch	AKQ	18 hr
Jul 7, 3:22 PM EDT	Flash Flood Watch	AKQ	36 hr
Jul 7, 11:21 PM EDT	Tropical Storm Warning	AKQ	27 hr
Jul 8, 6:31 AM EDT	Coastal Flood Advisory	AKQ	27 hr
Jul 8, 1:50 PM EDT	Tornado Watch	SPC	11 hr
Jul 8, 6:48 PM EDT	Mesoscale Discussion	SPC	117 min
Jul 8, 10:01 PM EDT	Mesoscale Discussion	SPC	59 min
Jul 8, 11:37 PM EDT	Areal Flood Advisory	AKQ	3 hr
Jul 9, 12:02 AM EDT	Areal Flood Advisory	AKQ	3 hr
Jul 9, 2:15 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 7:22 PM EDT	Severe Thunderstorm Warning	AKQ	28 min
Jul 17, 9:00 PM EDT	Special Weather Statement	AKQ	45 min
Jul 17, 10:51 PM EDT	Areal Flood Advisory	AKQ	114 min
Jul 21, 11:56 AM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 2:39 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 7, 4:01 PM EDT	Areal Flood Advisory	AKQ	6 hr
Aug 7, 4:05 PM EDT	Areal Flood Advisory	AKQ	5 hr
Aug 11, 3:55 AM EDT	Heat Advisory	AKQ	63 hr
Aug 13, 7:59 PM EDT	Special Weather Statement	AKQ	31 min
Aug 14, 1:10 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 19, 2:57 PM EDT	Flash Flood Watch	AKQ	31 hr
Aug 19, 10:01 PM EDT	Special Weather Statement	AKQ	59 min
Aug 20, 5:18 AM EDT	Special Weather Statement	AKQ	57 min
Aug 21, 2:11 AM EDT	Areal Flood Advisory	AKQ	3 hr
Aug 28, 12:07 AM EDT	Special Weather Statement	AKQ	38 min
Aug 30, 7:48 PM EDT	Special Weather Statement	AKQ	42 min
Sep 1, 11:03 AM EDT	Mesoscale Discussion	SPC	2 hr
Sep 1, 11:46 AM EDT	Tornado Watch	SPC	9 hr
Sep 1, 2:40 PM EDT	Severe Thunderstorm Warning Considerable damage threat	AKQ	50 min
Sep 1, 3:03 PM EDT	Tornado Warning	AKQ	27 min
Sep 1, 3:56 PM EDT	Severe Thunderstorm Warning	AKQ	49 min
Sep 1, 4:07 PM EDT	Coastal Flood Warning	AKQ	12 hr
Sep 1, 6:48 PM EDT	Special Weather Statement	AKQ	42 min
Sep 1, 6:53 PM EDT	Severe Thunderstorm Warning	AKQ	52 min
Sep 1, 7:29 PM EDT	Severe Thunderstorm Warning	AKQ	46 min
Sep 8, 3:45 PM EDT	Special Weather Statement	AKQ	45 min
Sep 8, 3:52 PM EDT	Severe Thunderstorm Warning	AKQ	30 min
Sep 22, 10:39 AM EDT	Coastal Flood Statement	AKQ	18 hr
Sep 22, 10:39 AM EDT	Coastal Flood Advisory	AKQ	35 hr
Sep 22, 6:14 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 23, 3:13 AM EDT	Mesoscale Discussion	SPC	5 hr
Oct 8, 4:00 PM EDT	Coastal Flood Statement	AKQ	43 hr
Oct 9, 5:00 PM EDT	Coastal Flood Advisory	AKQ	3 days
Oct 10, 5:20 AM EDT	Coastal Flood Warning	AKQ	39 hr
Oct 16, 4:53 AM EDT	Coastal Flood Statement	AKQ	9 hr
Oct 16, 4:52 PM EDT	Special Weather Statement	AKQ	38 min
Oct 16, 5:32 PM EDT	Special Weather Statement	AKQ	28 min
Oct 16, 7:10 PM EDT	Coastal Flood Statement	AKQ	6 hr
Oct 27, 3:30 PM EDT	Coastal Flood Watch	AKQ	24 hr
Oct 27, 9:31 PM EDT	Coastal Flood Advisory	AKQ	13 hr
Oct 28, 10:58 AM EDT	Coastal Flood Warning	AKQ	71 hr
Oct 29, 3:36 PM EDT	Mesoscale Discussion	SPC	2 hr
Oct 30, 10:44 AM EDT	Coastal Flood Advisory	AKQ	37 hr
Nov 3, 3:32 PM EDT	Frost Advisory	AKQ	12 hr
Nov 4, 3:19 AM EDT	Frost Advisory	AKQ	30 hr
Nov 5, 3:36 PM EDT	Frost Advisory	AKQ	15 hr
Nov 13, 3:17 AM EST	Freeze Warning	AKQ	30 hr
Dec 11, 6:25 PM EST	Special Weather Statement	AKQ	50 min
Dec 30, 11:51 PM EST	Dense Fog Advisory	AKQ	12 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	11
Tornado Warning	1
Severe Thunderstorm Watch	8
Tornado Watch	2
Mesoscale Discussion	19
Special Weather Statement	21
Flooding
Flash Flood Watch	3
Areal Flood Advisory	7
Winter
Winter Storm Watch	2
Winter Weather Advisory	3
Heat
Heat Advisory	1
Cold
Freeze Warning	1
Frost Advisory	4
Wind and dust
Wind Advisory	3
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	1
Tropical
Tropical Storm Warning	1
Tropical Storm Watch	1
Coast and beach
Coastal Flood Warning	3
Coastal Flood Watch	1
Coastal Flood Advisory	9
Coastal Flood Statement	8

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast 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. Warning verification from the Mesonet's Cow. Rebuilt daily.