Weather alerts in York County, Maine, 2020

207 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

York County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 207
Warnings: 50
Watches: 18
Advisories: 78
Busiest month: July43 alerts
Busiest day: June 6, 20209 alerts

Over time

By month

Warning verification

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

York County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	33	18	45%	29	90%	21 min
Flash flood warnings	2	2	0%	2	50%	55 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: tornado warnings	8	2	75%	4	50%	4 min
NWS Gray, ME: severe thunderstorm warnings	158	112	29%	277	87%	20 min
NWS Gray, ME: flash flood warnings	26	9	65%	14	93%	39 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 8, 4:54 PM EST	Special Weather Statement	GYX	36 min
Jan 8, 5:13 PM EST	Snow Squall Warning	GYX	47 min
Jan 8, 5:56 PM EST	Snow Squall Warning	GYX	64 min
Jan 8, 6:05 PM EST	Special Weather Statement	GYX	40 min
Jan 13, 3:48 PM EST	Winter Weather Advisory	GYX	6 hr
Jan 15, 3:05 AM EST	Winter Weather Advisory	GYX	38 hr
Jan 16, 1:48 AM EST	Winter Storm Warning	GYX	15 hr
Jan 17, 2:55 PM EST	Winter Storm Watch	GYX	12 hr
Jan 18, 3:16 AM EST	Winter Weather Advisory	GYX	28 hr
Jan 18, 3:11 PM EST	Winter Storm Warning	GYX	16 hr
Jan 25, 4:06 AM EST	Flood Watch	GYX	23 hr
Jan 25, 11:20 PM EST	Areal Flood Advisory	GYX	115 min
Feb 5, 3:54 AM EST	Winter Storm Watch	GYX	11 hr
Feb 5, 3:54 AM EST	Winter Weather Advisory	GYX	66 hr
Feb 6, 3:13 PM EST	Coastal Flood Advisory	GYX	20 hr
Feb 11, 3:56 AM EST	Dense Fog Advisory	GYX	2 hr
Feb 12, 2:56 AM EST	Winter Weather Advisory	GYX	33 hr
Feb 17, 3:01 PM EST	Winter Weather Advisory	GYX	33 hr
Feb 26, 3:46 AM EST	Wind Advisory	GYX	32 hr
Feb 26, 3:53 AM EST	Winter Weather Advisory	GYX	35 hr
Feb 26, 3:09 PM EST	Coastal Flood Statement	GYX	20 hr
Feb 27, 11:33 AM EST	Coastal Flood Advisory	GYX	3 hr
Mar 3, 2:51 PM EST	Wind Advisory	GYX	27 hr
Mar 7, 3:23 AM EST	Coastal Flood Advisory	GYX	7 hr
Mar 10, 3:35 AM EDT	Coastal Flood Statement	GYX	9 hr
Mar 13, 3:49 AM EDT	Coastal Flood Advisory	GYX	13 hr
Mar 22, 3:36 AM EDT	Winter Storm Watch	GYX	24 hr
Mar 23, 3:50 AM EDT	Winter Storm Warning	GYX	24 hr
Mar 23, 3:50 AM EDT	Winter Weather Advisory	GYX	24 hr
Mar 23, 3:26 PM EDT	Mesoscale Discussion	SPC	6 hr
Mar 29, 8:48 PM EDT	Special Weather Statement	GYX	42 min
Apr 1, 3:34 PM EDT	Coastal Flood Watch	GYX	18 hr
Apr 2, 3:31 AM EDT	Coastal Flood Advisory	GYX	29 hr
Apr 4, 3:26 AM EDT	Coastal Flood Statement	GYX	7 hr
Apr 7, 3:01 PM EDT	Coastal Flood Advisory	GYX	60 hr
Apr 9, 3:57 AM EDT	Winter Weather Advisory	GYX	24 hr
Apr 12, 3:47 AM EDT	High Wind Watch	GYX	12 hr
Apr 12, 3:19 PM EDT	Wind Advisory	GYX	31 hr
Apr 22, 6:17 AM EDT	Special Weather Statement	GYX	58 min
Apr 26, 3:41 AM EDT	Winter Weather Advisory	GYX	36 hr
May 6, 3:48 AM EDT	Coastal Flood Statement	GYX	21 hr
May 7, 3:11 AM EDT	Coastal Flood Advisory	GYX	24 hr
May 8, 3:11 AM EDT	Coastal Flood Statement	GYX	23 hr
May 8, 3:15 PM EDT	Coastal Flood Advisory	GYX	11 hr
May 8, 8:24 PM EDT	Wind Advisory	GYX	24 hr
May 9, 3:00 PM EDT	Freeze Warning	GYX	15 hr
May 11, 12:56 PM EDT	Mesoscale Discussion	SPC	3 hr
May 12, 10:07 AM EDT	Wind Advisory	GYX	5 hr
May 12, 3:21 PM EDT	Frost Advisory	GYX	15 hr
May 12, 3:21 PM EDT	Freeze Warning	GYX	15 hr
May 13, 2:54 PM EDT	Freeze Warning	GYX	16 hr
May 21, 3:12 PM EDT	Beach Hazards Statement	GYX	29 hr
May 23, 2:58 PM EDT	Frost Advisory	GYX	16 hr
May 25, 10:15 PM EDT	Dense Fog Advisory	GYX	10 hr
May 27, 11:38 AM EDT	Beach Hazards Statement	GYX	8 hr
May 31, 2:59 AM EDT	Beach Hazards Statement	GYX	17 hr
May 31, 2:56 PM EDT	Frost Advisory	GYX	15 hr
Jun 4, 2:53 PM EDT	Coastal Flood Statement	GYX	9 hr
Jun 5, 3:18 PM EDT	Coastal Flood Statement	GYX	11 hr
Jun 6, 3:23 AM EDT	Beach Hazards Statement	GYX	17 hr
Jun 6, 9:45 AM EDT	Severe Thunderstorm Warning	GYX	45 min
Jun 6, 10:46 AM EDT	Mesoscale Discussion	SPC	119 min
Jun 6, 12:23 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 6, 1:04 PM EDT	Severe Thunderstorm Warning	GYX	26 min
Jun 6, 2:20 PM EDT	Mesoscale Discussion	SPC	85 min
Jun 6, 2:24 PM EDT	Severe Thunderstorm Warning	GYX	37 min
Jun 6, 2:52 PM EDT	Severe Thunderstorm Warning	GYX	38 min
Jun 6, 3:14 PM EDT	Severe Thunderstorm Warning	GYX	26 min
Jun 12, 3:20 PM EDT	Beach Hazards Statement	GYX	29 hr
Jun 17, 2:50 PM EDT	Beach Hazards Statement	GYX	30 hr
Jun 18, 8:39 PM EDT	Beach Hazards Statement	GYX	24 hr
Jun 19, 8:53 PM EDT	Beach Hazards Statement	GYX	24 hr
Jun 20, 2:49 PM EDT	Special Weather Statement	GYX	41 min
Jun 20, 9:40 PM EDT	Beach Hazards Statement	GYX	23 hr
Jun 24, 7:14 AM EDT	Dense Fog Advisory	GYX	106 min
Jun 24, 2:55 PM EDT	Special Weather Statement	GYX	35 min
Jun 28, 4:04 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Jun 28, 4:54 PM EDT	Severe Thunderstorm Warning	GYX	51 min
Jun 28, 5:29 PM EDT	Flash Flood Warning	GYX	3 hr
Jun 28, 5:39 PM EDT	Severe Thunderstorm Warning	GYX	51 min
Jun 28, 6:18 PM EDT	Special Weather Statement	GYX	27 min
Jun 28, 6:30 PM EDT	Flash Flood Warning	GYX	3 hr
Jun 28, 6:34 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Jun 29, 6:39 PM EDT	Areal Flood Advisory	GYX	3 hr
Jun 30, 8:15 PM EDT	Areal Flood Advisory	GYX	4 hr
Jul 2, 12:38 AM EDT	Dense Fog Advisory	GYX	7 hr
Jul 2, 6:30 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 7:10 PM EDT	Severe Thunderstorm Warning	GYX	23 min
Jul 2, 7:58 PM EDT	Severe Thunderstorm Warning	GYX	28 min
Jul 3, 8:57 AM EDT	Beach Hazards Statement	GYX	59 hr
Jul 5, 2:20 PM EDT	Mesoscale Discussion	SPC	115 min
Jul 8, 1:01 PM EDT	Mesoscale Discussion	SPC	119 min
Jul 8, 2:00 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 8, 4:24 PM EDT	Mesoscale Discussion	SPC	96 min
Jul 8, 4:34 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Jul 8, 4:59 PM EDT	Severe Thunderstorm Warning	GYX	46 min
Jul 8, 6:02 PM EDT	Severe Thunderstorm Warning	GYX	43 min
Jul 8, 6:56 PM EDT	Special Weather Statement	GYX	34 min
Jul 8, 7:11 PM EDT	Severe Thunderstorm Warning	GYX	49 min
Jul 9, 2:18 AM EDT	Dense Fog Advisory	GYX	7 hr
Jul 9, 7:02 PM EDT	Dense Fog Advisory	GYX	15 hr
Jul 11, 4:31 AM EDT	Areal Flood Advisory	GYX	97 min
Jul 13, 12:54 PM EDT	Mesoscale Discussion	SPC	96 min
Jul 13, 1:37 PM EDT	Special Weather Statement	GYX	23 min
Jul 13, 1:58 PM EDT	Special Weather Statement	GYX	47 min
Jul 13, 2:17 PM EDT	Severe Thunderstorm Warning	GYX	58 min
Jul 13, 2:38 PM EDT	Severe Thunderstorm Warning	GYX	52 min
Jul 13, 3:10 PM EDT	Special Weather Statement	GYX	35 min
Jul 13, 6:24 PM EDT	Severe Thunderstorm Warning	GYX	51 min
Jul 14, 8:21 AM EDT	Special Weather Statement	GYX	39 min
Jul 14, 8:32 AM EDT	Severe Thunderstorm Warning	GYX	43 min
Jul 14, 9:02 AM EDT	Areal Flood Advisory	GYX	2 hr
Jul 14, 9:12 AM EDT	Severe Thunderstorm Warning	GYX	48 min
Jul 14, 9:37 AM EDT	Severe Thunderstorm Warning	GYX	38 min
Jul 14, 9:43 AM EDT	Mesoscale Discussion	SPC	92 min
Jul 14, 10:03 AM EDT	Severe Thunderstorm Warning	GYX	42 min
Jul 18, 3:27 AM EDT	Dense Fog Advisory	GYX	4 hr
Jul 18, 7:02 AM EDT	Dense Fog Advisory	GYX	58 min
Jul 18, 10:30 AM EDT	Heat Advisory	GYX	57 hr
Jul 23, 12:05 PM EDT	Mesoscale Discussion	SPC	115 min
Jul 23, 12:58 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 23, 6:48 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 26, 3:28 AM EDT	Excessive Heat Watch	GYX	16 hr
Jul 26, 3:28 AM EDT	Heat Advisory	GYX	16 hr
Jul 26, 7:52 PM EDT	Heat Advisory	GYX	24 hr
Jul 28, 3:32 AM EDT	Heat Advisory	GYX	15 hr
Jul 30, 5:18 PM EDT	Special Weather Statement	GYX	27 min
Aug 3, 5:41 AM EDT	Tropical Storm Watch	GYX	35 hr
Aug 3, 5:33 PM EDT	Tropical Storm Warning	GYX	33 hr
Aug 4, 3:19 AM EDT	Coastal Flood Advisory	GYX	23 hr
Aug 4, 5:44 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 3:27 PM EDT	Heat Advisory	GYX	29 hr
Aug 15, 3:08 PM EDT	High Surf Advisory	GYX	51 hr
Aug 19, 4:57 PM EDT	Severe Thunderstorm Warning	GYX	48 min
Aug 22, 1:17 PM EDT	Special Weather Statement	GYX	28 min
Aug 22, 1:18 PM EDT	Mesoscale Discussion	SPC	87 min
Aug 22, 1:43 PM EDT	Special Weather Statement	GYX	32 min
Aug 22, 2:07 PM EDT	Severe Thunderstorm Warning	GYX	38 min
Aug 22, 2:07 PM EDT	Severe Thunderstorm Warning	GYX	38 min
Aug 22, 2:39 PM EDT	Severe Thunderstorm Warning	GYX	51 min
Aug 22, 3:21 PM EDT	Severe Thunderstorm Warning	GYX	39 min
Aug 22, 3:50 PM EDT	Severe Thunderstorm Warning	GYX	19 min
Aug 23, 2:08 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 3:45 PM EDT	Severe Thunderstorm Warning	GYX	32 min
Aug 24, 2:00 PM EDT	Mesoscale Discussion	SPC	2 hr
Aug 24, 11:38 PM EDT	Dense Fog Advisory	GYX	8 hr
Aug 25, 2:09 PM EDT	Mesoscale Discussion	SPC	96 min
Aug 25, 3:12 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 25, 3:55 PM EDT	Severe Thunderstorm Warning	GYX	50 min
Aug 25, 4:29 PM EDT	Severe Thunderstorm Warning	GYX	31 min
Sep 9, 7:05 AM EDT	Dense Fog Advisory	GYX	3 hr
Sep 9, 2:37 PM EDT	Dense Fog Advisory	GYX	19 hr
Sep 14, 3:25 AM EDT	Frost Advisory	GYX	30 hr
Sep 14, 3:33 AM EDT	High Surf Advisory	GYX	43 hr
Sep 18, 2:44 PM EDT	Frost Advisory	GYX	16 hr
Sep 19, 3:02 PM EDT	Frost Advisory	GYX	16 hr
Sep 19, 3:02 PM EDT	Freeze Warning	GYX	16 hr
Sep 19, 3:17 PM EDT	Coastal Flood Statement	GYX	24 hr
Sep 20, 3:13 PM EDT	High Surf Advisory	GYX	27 hr
Sep 20, 3:17 PM EDT	Frost Advisory	GYX	18 hr
Sep 21, 10:58 AM EDT	Coastal Flood Advisory	GYX	7 hr
Sep 21, 3:18 PM EDT	Frost Advisory	GYX	14 hr
Sep 21, 3:38 PM EDT	Coastal Flood Watch	GYX	13 hr
Sep 22, 4:13 AM EDT	Coastal Flood Warning	GYX	25 hr
Sep 23, 5:42 AM EDT	Coastal Flood Advisory	GYX	9 hr
Sep 23, 3:06 PM EDT	High Surf Advisory	GYX	5 hr
Sep 25, 2:47 PM EDT	Beach Hazards Statement	GYX	28 hr
Sep 26, 4:40 AM EDT	Dense Fog Advisory	GYX	4 hr
Sep 29, 3:04 PM EDT	Wind Advisory	GYX	23 hr
Oct 7, 4:12 AM EDT	Wind Advisory	GYX	17 hr
Oct 7, 5:11 PM EDT	Severe Thunderstorm Warning	GYX	49 min
Oct 7, 5:37 PM EDT	Severe Thunderstorm Warning	GYX	18 min
Oct 8, 3:24 PM EDT	Frost Advisory	GYX	16 hr
Oct 9, 2:40 AM EDT	Freeze Warning	GYX	5 hr
Oct 22, 12:28 AM EDT	Dense Fog Advisory	GYX	8 hr
Nov 1, 7:58 PM EST	Wind Advisory	GYX	23 hr
Nov 8, 9:44 PM EST	Dense Fog Advisory	GYX	12 hr
Nov 14, 3:34 PM EST	Wind Advisory	GYX	35 hr
Nov 15, 2:37 AM EST	Coastal Flood Advisory	GYX	9 hr
Nov 15, 11:11 PM EST	Special Weather Statement	GYX	64 min
Nov 16, 2:56 AM EST	Coastal Flood Statement	GYX	10 hr
Nov 23, 9:45 AM EST	Areal Flood Advisory	GYX	2 hr
Nov 25, 3:13 PM EST	Winter Weather Advisory	GYX	21 hr
Nov 30, 2:33 AM EST	Wind Advisory	GYX	28 hr
Nov 30, 2:32 PM EST	Flood Watch	GYX	24 hr
Nov 30, 2:43 PM EST	Coastal Flood Statement	GYX	4 hr
Nov 30, 6:52 PM EST	Coastal Flood Advisory	GYX	7 hr
Dec 1, 3:17 AM EST	Coastal Flood Advisory	GYX	11 hr
Dec 3, 3:57 PM EST	Winter Storm Watch	GYX	36 hr
Dec 4, 4:06 PM EST	Winter Storm Warning	GYX	42 hr
Dec 13, 6:10 AM EST	Dense Fog Advisory	GYX	5 hr
Dec 13, 12:57 PM EST	Dense Fog Advisory	GYX	3 hr
Dec 13, 4:05 PM EST	Coastal Flood Statement	GYX	19 hr
Dec 15, 4:04 PM EST	Winter Storm Watch	GYX	11 hr
Dec 16, 3:28 AM EST	Winter Storm Warning	GYX	39 hr
Dec 16, 2:51 PM EST	Coastal Flood Statement	GYX	18 hr
Dec 17, 4:33 AM EST	Mesoscale Discussion	SPC	6 hr
Dec 17, 8:30 AM EST	Coastal Flood Advisory	GYX	7 hr
Dec 17, 10:05 AM EST	Mesoscale Discussion	SPC	4 hr
Dec 17, 10:26 AM EST	Special Weather Statement	GYX	64 min
Dec 17, 2:01 PM EST	Special Weather Statement	GYX	59 min
Dec 18, 9:57 AM EST	Coastal Flood Statement	GYX	5 hr
Dec 20, 11:51 PM EST	Dense Fog Advisory	GYX	9 hr
Dec 22, 3:37 PM EST	High Wind Watch	GYX	48 hr
Dec 23, 1:50 PM EST	Flood Watch	GYX	60 hr
Dec 24, 9:33 AM EST	High Wind Warning	GYX	30 hr
Dec 24, 3:39 PM EST	Wind Advisory	GYX	24 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	33
Severe Thunderstorm Watch	4
Mesoscale Discussion	19
Special Weather Statement	18
Flooding
Flash Flood Warning	2
Flood Watch	3
Areal Flood Advisory	6
Winter
Snow Squall Warning	2
Winter Storm Warning	5
Winter Storm Watch	5
Winter Weather Advisory	11
Heat
Excessive Heat Watch	1
Heat Advisory	5
Cold
Freeze Warning	5
Frost Advisory	9
Wind and dust
High Wind Warning	1
High Wind Watch	2
Wind Advisory	11
Fog and smoke
Dense Fog Advisory	17
Tropical
Tropical Storm Warning	1
Tropical Storm Watch	1
Coast and beach
Coastal Flood Warning	1
Coastal Flood Watch	2
Coastal Flood Advisory	15
High Surf Advisory	4
Beach Hazards Statement	11
Coastal Flood Statement	13

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.