Alert archive / Maine / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Maine, 2024

98 severe thunderstorm warnings in 2024. 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 2024. Tap one for its archive.

Severe Thunderstorm Warnings: 98
Busiest month: June46 severe thunderstorm warnings
Busiest day: May 23, 202414 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.

59 of 98 severe thunderstorm warnings covering Maine in 2024 had a qualifying storm report inside them; 173 of 219 hail, wind and damage reports fell inside a warning, on average 20 minutes after it went out.

Maine, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	98	59	40%	219	79%	20 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: severe thunderstorm warnings	99	77	22%	324	81%	19 min
NWS Caribou, ME: severe thunderstorm warnings	45	26	42%	141	77%	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
May 23, 12:42 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	33 min
May 23, 1:04 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	25 min
May 23, 1:06 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	39 min
May 23, 1:08 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	52 min
May 23, 1:34 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Oxford	41 min
May 23, 1:37 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	38 min
May 23, 2:25 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec	50 min
May 23, 2:30 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	45 min
May 23, 2:38 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Waldo	52 min
May 23, 2:41 PM EDT	Severe Thunderstorm Warning	GYX	Somerset, Waldo	49 min
May 23, 2:58 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	47 min
May 23, 3:18 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	16 min
May 23, 3:24 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	51 min
May 23, 3:36 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	39 min
Jun 5, 2:06 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	39 min
Jun 5, 2:45 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	45 min
Jun 5, 3:55 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	50 min
Jun 5, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	York	39 min
Jun 5, 4:45 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	30 min
Jun 5, 4:46 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	44 min
Jun 5, 6:31 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	29 min
Jun 5, 6:53 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	37 min
Jun 7, 6:44 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	29 min
Jun 8, 1:42 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin	33 min
Jun 8, 2:44 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Lincoln	33 min
Jun 14, 2:00 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	30 min
Jun 14, 2:14 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Kennebec, Somerset	46 min
Jun 14, 2:25 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	15 min
Jun 14, 3:53 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	37 min
Jun 14, 7:52 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	27 min
Jun 14, 8:37 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	23 min
Jun 19, 3:48 PM EDT	Severe Thunderstorm Warning Considerable damage threat	GYX	Oxford	42 min
Jun 19, 4:17 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	43 min
Jun 20, 3:04 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	41 min
Jun 20, 3:17 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	43 min
Jun 20, 3:29 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Kennebec, Somerset, Waldo	61 min
Jun 20, 3:45 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Piscataquis	45 min
Jun 20, 3:55 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	65 min
Jun 20, 4:16 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Waldo	59 min
Jun 20, 4:19 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	56 min
Jun 20, 5:05 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Washington	40 min
Jun 20, 5:25 PM EDT	Severe Thunderstorm Warning	GYX	Knox, Lincoln	50 min
Jun 23, 6:02 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	43 min
Jun 23, 6:13 PM EDT	Severe Thunderstorm Warning	GYX	York	62 min
Jun 23, 6:31 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Oxford	44 min
Jun 23, 6:57 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec	48 min
Jun 23, 8:33 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Knox, Lincoln, Sagadahoc	42 min
Jun 30, 1:34 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Penobscot, Piscataquis	41 min
Jun 30, 2:07 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook, Penobscot, Piscataquis	53 min
Jun 30, 2:43 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook	47 min
Jun 30, 2:44 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook	46 min
Jun 30, 2:50 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook, Hancock, Penobscot, Piscataquis, Washington	40 min
Jun 30, 3:19 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	26 min
Jun 30, 3:24 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Washington	36 min
Jun 30, 3:29 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Hancock, Penobscot, Washington	31 min
Jun 30, 3:45 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	45 min
Jun 30, 3:55 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Hancock, Penobscot, Washington	50 min
Jun 30, 4:20 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Sagadahoc	40 min
Jun 30, 4:31 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Waldo	44 min
Jun 30, 4:39 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	51 min
Jul 5, 12:02 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis, Somerset	43 min
Jul 5, 12:37 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	38 min
Jul 5, 12:53 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	30 min
Jul 5, 1:02 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	37 min
Jul 5, 3:19 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	56 min
Jul 7, 12:30 AM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Lincoln, Sagadahoc	29 min
Jul 9, 1:42 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Oxford	48 min
Jul 9, 3:40 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Somerset, Waldo	35 min
Jul 9, 4:05 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	40 min
Jul 9, 4:29 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	61 min
Jul 9, 5:10 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Waldo	50 min
Jul 9, 5:13 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Washington	62 min
Jul 9, 5:26 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	49 min
Jul 9, 5:42 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	48 min
Jul 9, 6:10 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Lincoln, Sagadahoc	50 min
Jul 9, 6:30 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	60 min
Jul 13, 3:13 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CAR	Aroostook, Penobscot	47 min
Jul 13, 3:56 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	26 min
Jul 13, 5:31 PM EDT	Severe Thunderstorm Warning	GYX	York	44 min
Jul 13, 8:56 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	64 min
Jul 13, 9:38 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	52 min
Jul 16, 7:59 PM EDT	Severe Thunderstorm Warning	GYX	York	46 min
Jul 16, 8:25 PM EDT	Severe Thunderstorm Warning	GYX	York	50 min
Jul 16, 8:52 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	45 min
Jul 17, 4:58 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Oxford	47 min
Jul 17, 5:31 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec	24 min
Jul 30, 4:27 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Piscataquis	48 min
Aug 3, 8:37 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	38 min
Aug 4, 1:17 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	43 min
Aug 4, 1:44 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	22 min
Aug 4, 3:52 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	38 min
Aug 4, 6:41 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Piscataquis	49 min
Aug 4, 7:09 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	36 min
Aug 5, 7:09 PM EDT	Severe Thunderstorm Warning	GYX	York	47 min
Aug 14, 6:12 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	48 min
Aug 14, 6:41 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	49 min
Aug 14, 8:05 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec	40 min
Aug 14, 8:46 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Sagadahoc	44 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 2023 2025

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.