Alert archive / Maine / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Maine, 2022

143 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: 143
Busiest month: July64 severe thunderstorm warnings
Busiest day: July 12, 202219 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.

61 of 143 severe thunderstorm warnings covering Maine in 2022 had a qualifying storm report inside them; 97 of 133 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.

Maine, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	143	61	57%	133	73%	22 min

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: severe thunderstorm warnings	117	88	25%	400	76%	24 min
NWS Caribou, ME: severe thunderstorm warnings	77	18	77%	55	62%	24 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
May 21, 3:28 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook	47 min
May 21, 4:12 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	48 min
May 21, 4:56 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	23 min
May 21, 6:07 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis, Somerset	38 min
May 21, 6:40 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	65 min
May 21, 6:46 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GYX	Franklin, Oxford	59 min
May 21, 7:30 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	45 min
May 21, 7:37 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GYX	Franklin, Oxford, Somerset	53 min
May 21, 8:16 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	44 min
May 22, 1:43 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	32 min
May 22, 1:44 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	46 min
May 22, 2:21 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	39 min
May 22, 3:59 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	31 min
May 22, 4:29 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Oxford	31 min
May 22, 4:42 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GYX	Androscoggin, Franklin, Kennebec, Oxford	33 min
May 22, 5:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GYX	Franklin, Kennebec, Somerset	45 min
May 22, 5:04 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	41 min
May 22, 5:33 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	42 min
May 22, 5:34 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	26 min
May 22, 5:36 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	39 min
May 22, 5:38 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Waldo	37 min
May 22, 6:08 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	40 min
May 22, 6:13 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	11 min
May 22, 6:55 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Somerset, Waldo	50 min
May 22, 7:02 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	43 min
Jun 4, 12:20 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	25 min
Jun 4, 1:49 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis, Somerset	26 min
Jun 4, 1:55 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	36 min
Jun 4, 2:43 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	47 min
Jun 4, 3:04 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	41 min
Jun 4, 3:26 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	34 min
Jun 4, 3:28 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis, Somerset	47 min
Jun 4, 3:40 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	24 min
Jun 4, 3:50 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	55 min
Jun 4, 4:07 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	23 min
Jun 4, 4:26 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	15 min
Jun 4, 4:52 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	15 min
Jun 4, 6:30 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	30 min
Jun 4, 7:05 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	40 min
Jun 4, 7:07 PM EDT	Severe Thunderstorm Warning	CAR	Somerset	23 min
Jun 4, 7:30 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford	34 min
Jun 13, 2:22 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	38 min
Jun 13, 2:47 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	43 min
Jun 13, 2:59 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	46 min
Jun 13, 5:07 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Lincoln, Sagadahoc, Waldo	38 min
Jun 13, 6:29 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Lincoln, Sagadahoc	46 min
Jun 17, 1:00 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	30 min
Jun 17, 1:07 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Waldo	23 min
Jun 17, 1:32 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln, Sagadahoc	28 min
Jun 17, 1:55 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln	35 min
Jun 17, 4:06 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	39 min
Jun 17, 4:07 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	38 min
Jun 17, 4:50 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	28 min
Jun 17, 4:52 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	23 min
Jul 1, 5:27 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	18 min
Jul 1, 6:21 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	19 min
Jul 2, 3:41 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	49 min
Jul 2, 4:25 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Washington	50 min
Jul 8, 4:53 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	38 min
Jul 12, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	17 min
Jul 12, 5:04 PM EDT	Severe Thunderstorm Warning	GYX	York	41 min
Jul 12, 5:15 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	60 min
Jul 12, 5:31 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	44 min
Jul 12, 5:33 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	57 min
Jul 12, 5:40 PM EDT	Severe Thunderstorm Warning	GYX	York	65 min
Jul 12, 5:44 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	46 min
Jul 12, 6:01 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	59 min
Jul 12, 6:06 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	54 min
Jul 12, 6:16 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	44 min
Jul 12, 6:20 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	40 min
Jul 12, 6:54 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	51 min
Jul 12, 6:57 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	48 min
Jul 12, 6:59 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	46 min
Jul 12, 7:01 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Penobscot, Piscataquis	44 min
Jul 12, 7:07 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Penobscot, Piscataquis	38 min
Jul 12, 7:40 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	50 min
Jul 12, 7:40 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Washington	50 min
Jul 12, 7:45 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Piscataquis	45 min
Jul 12, 8:28 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	25 min
Jul 12, 8:29 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Washington	31 min
Jul 14, 2:09 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Washington	66 min
Jul 14, 2:30 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Washington	45 min
Jul 14, 3:07 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Kennebec	53 min
Jul 18, 6:23 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	40 min
Jul 19, 12:35 AM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	40 min
Jul 19, 1:07 AM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	23 min
Jul 19, 3:54 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	36 min
Jul 19, 4:21 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	24 min
Jul 19, 6:21 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	24 min
Jul 21, 2:38 PM EDT	Severe Thunderstorm Warning	GYX	Franklin	67 min
Jul 21, 3:24 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	66 min
Jul 21, 3:26 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Piscataquis, Somerset	64 min
Jul 21, 3:26 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	49 min
Jul 21, 4:11 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland	64 min
Jul 21, 4:27 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	63 min
Jul 21, 4:42 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Lincoln, Oxford, Sagadahoc	48 min
Jul 21, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	York	52 min
Jul 21, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland	56 min
Jul 21, 5:17 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	43 min
Jul 21, 5:23 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis, Somerset	52 min
Jul 21, 5:46 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	59 min
Jul 21, 6:02 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	43 min
Jul 21, 6:38 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	26 min
Jul 21, 7:29 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	28 min
Jul 23, 8:05 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	18 min
Jul 24, 4:01 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook, Somerset	59 min
Jul 24, 4:51 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	54 min
Jul 24, 5:37 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	53 min
Jul 24, 6:56 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	64 min
Jul 25, 8:27 AM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford, York	25 min
Jul 25, 1:40 PM EDT	Severe Thunderstorm Warning	GYX	York	50 min
Jul 25, 4:12 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Piscataquis	33 min
Jul 25, 4:37 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook, Penobscot	38 min
Jul 25, 5:19 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	41 min
Jul 25, 6:52 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln	38 min
Jul 25, 7:26 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Waldo	25 min
Jul 28, 5:52 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland	38 min
Jul 28, 6:07 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	26 min
Aug 2, 2:32 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Piscataquis	43 min
Aug 2, 3:30 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Piscataquis	45 min
Aug 2, 4:54 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	36 min
Aug 4, 8:44 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	46 min
Aug 4, 8:47 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Oxford	43 min
Aug 4, 9:34 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	56 min
Aug 6, 6:36 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	20 min
Aug 7, 5:20 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	40 min
Aug 8, 6:28 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	50 min
Aug 8, 6:35 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	55 min
Aug 26, 3:08 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	28 min
Aug 26, 3:12 PM EDT	Severe Thunderstorm Warning	GYX	York	48 min
Aug 26, 3:31 PM EDT	Severe Thunderstorm Warning	GYX	York	44 min
Aug 26, 3:55 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	35 min
Aug 30, 4:34 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	41 min
Aug 30, 5:05 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	25 min
Aug 30, 5:15 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	30 min
Aug 30, 5:29 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	46 min
Sep 4, 6:23 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	37 min
Sep 22, 8:12 AM EDT	Severe Thunderstorm Warning	GYX	York	33 min
Sep 27, 2:08 PM EDT	Severe Thunderstorm Warning	CAR	Washington	20 min
Oct 14, 11:00 AM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	60 min
Nov 30, 7:07 PM EST	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford, Sagadahoc, York	53 min
Dec 23, 3:53 PM EST	Severe Thunderstorm Warning Considerable damage threat	CAR	Piscataquis, Somerset	52 min
Dec 23, 5:18 PM EST	Severe Thunderstorm Warning Considerable damage threat	GYX	York	57 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.