Alert archive / Arizona / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Arizona, 2023

336 severe thunderstorm warnings in 2023. 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 2023. Tap one for its archive.

Severe Thunderstorm Warnings: 336
Busiest month: August128 severe thunderstorm warnings
Busiest day: September 13, 202333 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 336 severe thunderstorm warnings covering Arizona in 2023 had a qualifying storm report inside them; 133 of 187 hail, wind and damage reports fell inside a warning, on average 19 minutes after it went out.

Arizona, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	336	61	82%	187	71%	19 min

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Las Vegas, NV: severe thunderstorm warnings	52	6	88%	37	22%	21 min
NWS Flagstaff, AZ: severe thunderstorm warnings	79	7	91%	14	57%	16 min
NWS Tucson, AZ: severe thunderstorm warnings	150	30	80%	98	73%	18 min
NWS Phoenix, AZ: severe thunderstorm warnings	87	23	74%	71	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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Counties	Lasted
Jan 1, 1:41 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Jan 1, 3:17 PM MST	Severe Thunderstorm Warning	PSR	Pinal	28 min
Jan 1, 3:39 PM MST	Severe Thunderstorm Warning	PSR	Pinal	36 min
Feb 22, 7:10 AM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	35 min
Mar 1, 6:58 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	32 min
Mar 1, 7:00 PM MST	Severe Thunderstorm Warning	PSR	Pinal	30 min
Mar 1, 7:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	32 min
Mar 1, 7:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	30 min
Mar 1, 7:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	29 min
Mar 15, 4:14 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Mar 15, 4:26 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	34 min
Mar 15, 4:51 PM MST	Severe Thunderstorm Warning	PSR	Yuma	39 min
Mar 15, 4:51 PM MST	Severe Thunderstorm Warning	VEF	Mohave	39 min
Mar 15, 5:26 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	34 min
Mar 15, 5:43 PM MST	Severe Thunderstorm Warning	VEF	Mohave	47 min
Mar 15, 8:49 PM MST	Severe Thunderstorm Warning	PSR	Pinal	26 min
May 14, 11:54 AM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	51 min
May 14, 1:32 PM MST	Severe Thunderstorm Warning	VEF	Mohave	28 min
May 17, 1:35 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	25 min
May 17, 4:02 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	18 min
May 17, 5:38 PM MST	Severe Thunderstorm Warning	TWC	Graham	52 min
May 17, 6:10 PM MST	Severe Thunderstorm Warning	TWC	Graham	35 min
May 19, 1:36 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Jun 6, 11:54 AM MST	Severe Thunderstorm Warning	FGZ	Apache	51 min
Jun 6, 1:03 PM MST	Severe Thunderstorm Warning	FGZ	Apache	42 min
Jun 6, 1:42 PM MST	Severe Thunderstorm Warning	FGZ	Apache	43 min
Jun 6, 2:12 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	18 min
Jul 11, 3:51 PM MST	Severe Thunderstorm Warning	TWC	Cochise	39 min
Jul 11, 4:24 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	51 min
Jul 13, 5:07 PM MST	Severe Thunderstorm Warning	FGZ	Gila	23 min
Jul 17, 1:52 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	53 min
Jul 17, 2:36 PM MST	Severe Thunderstorm Warning	VEF	Mohave	39 min
Jul 17, 2:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 17, 2:52 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	53 min
Jul 17, 3:11 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Jul 17, 3:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Jul 17, 4:23 PM MST	Severe Thunderstorm Warning	TWC	Pima	52 min
Jul 17, 4:48 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	57 min
Jul 17, 5:43 PM MST	Severe Thunderstorm Warning	TWC	Pinal	47 min
Jul 17, 6:43 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	47 min
Jul 17, 6:57 PM MST	Severe Thunderstorm Warning	PSR	Pinal	33 min
Jul 17, 7:02 PM MST	Severe Thunderstorm Warning	PSR	Gila	43 min
Jul 17, 7:30 PM MST	Severe Thunderstorm Warning	PSR	Pinal	33 min
Jul 19, 3:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Jul 19, 4:36 PM MST	Severe Thunderstorm Warning	TWC	Pima	54 min
Jul 21, 3:41 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	34 min
Jul 21, 4:59 PM MST	Severe Thunderstorm Warning	PSR	Gila	31 min
Jul 21, 5:00 PM MST	Severe Thunderstorm Warning	TWC	Graham	45 min
Jul 21, 5:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	48 min
Jul 21, 5:21 PM MST	Severe Thunderstorm Warning	PSR	Gila	24 min
Jul 21, 5:50 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	40 min
Jul 21, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	61 min
Jul 22, 3:50 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	40 min
Jul 22, 4:06 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	39 min
Jul 22, 6:12 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	48 min
Jul 23, 12:56 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	32 min
Jul 23, 1:42 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	18 min
Jul 23, 3:05 PM MST	Severe Thunderstorm Warning	VEF	Mohave	40 min
Jul 23, 3:22 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	38 min
Jul 23, 4:35 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	40 min
Jul 23, 7:31 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Jul 24, 3:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Jul 25, 3:43 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	47 min
Jul 25, 3:46 PM MST	Severe Thunderstorm Warning	VEF	Mohave	44 min
Jul 25, 4:07 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	38 min
Jul 25, 4:10 PM MST	Severe Thunderstorm Warning	TWC	Pima	31 min
Jul 25, 5:05 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Jul 25, 5:56 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Jul 26, 10:53 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	20 min
Jul 26, 3:04 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	41 min
Jul 26, 3:43 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	47 min
Jul 26, 3:44 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	46 min
Jul 26, 5:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	42 min
Jul 26, 5:19 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	41 min
Jul 26, 5:30 PM MST	Severe Thunderstorm Warning	TWC	Pima	60 min
Jul 26, 5:58 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	24 min
Jul 26, 6:25 PM MST	Severe Thunderstorm Warning	TWC	Pima	65 min
Jul 26, 6:56 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	49 min
Jul 26, 7:21 PM MST	Severe Thunderstorm Warning	TWC	Pima	54 min
Jul 26, 7:29 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	22 min
Jul 26, 8:17 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima	58 min
Jul 26, 8:43 PM MST	Severe Thunderstorm Warning	TWC	Pinal	31 min
Jul 26, 8:58 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	47 min
Jul 26, 9:18 PM MST	Severe Thunderstorm Warning	PSR	Pinal	27 min
Jul 26, 9:49 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	41 min
Jul 26, 10:01 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	44 min
Jul 26, 10:27 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Jul 26, 10:33 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	42 min
Jul 27, 4:06 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	39 min
Jul 27, 4:13 PM MST	Severe Thunderstorm Warning	PSR	La Paz	47 min
Jul 27, 5:01 PM MST	Severe Thunderstorm Warning	TWC	Cochise	44 min
Jul 27, 5:42 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise	48 min
Jul 27, 6:16 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise, Pima	59 min
Jul 27, 8:23 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	52 min
Jul 27, 8:32 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	28 min
Jul 27, 9:02 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	43 min
Jul 27, 9:43 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	47 min
Jul 28, 10:50 AM MST	Severe Thunderstorm Warning	FGZ	Yavapai	25 min
Jul 28, 11:30 AM MST	Severe Thunderstorm Warning	FGZ	Yavapai	30 min
Jul 28, 12:24 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	36 min
Jul 28, 2:47 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min
Jul 28, 3:50 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	38 min
Jul 28, 4:22 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	53 min
Jul 28, 4:26 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham, Pima, Pinal	64 min
Jul 28, 5:26 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	34 min
Jul 28, 5:56 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Jul 28, 6:03 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	57 min
Jul 28, 6:31 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima	44 min
Jul 28, 7:44 PM MST	Severe Thunderstorm Warning	PSR	Gila	31 min
Jul 29, 3:28 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	32 min
Jul 29, 5:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jul 29, 5:58 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jul 29, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jul 29, 8:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	48 min
Jul 30, 2:46 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	29 min
Jul 30, 4:38 PM MST	Severe Thunderstorm Warning	TWC	Pima	37 min
Jul 30, 4:40 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	35 min
Jul 30, 5:11 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	49 min
Jul 30, 6:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jul 30, 6:41 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Jul 30, 8:34 PM MST	Severe Thunderstorm Warning	TWC	Pima	41 min
Jul 30, 9:01 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Jul 31, 12:15 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	30 min
Jul 31, 12:20 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	25 min
Jul 31, 12:34 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	26 min
Jul 31, 12:55 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Jul 31, 1:07 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Jul 31, 1:19 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	26 min
Jul 31, 1:40 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Jul 31, 1:48 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	27 min
Jul 31, 1:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	61 min
Jul 31, 2:33 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	27 min
Jul 31, 2:52 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	12 min
Jul 31, 4:49 PM MST	Severe Thunderstorm Warning	TWC	Pinal	29 min
Jul 31, 5:05 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	25 min
Jul 31, 5:21 PM MST	Severe Thunderstorm Warning	VEF	Mohave	39 min
Jul 31, 5:30 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	30 min
Jul 31, 6:05 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Jul 31, 6:41 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	49 min
Jul 31, 7:30 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	45 min
Jul 31, 8:07 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	53 min
Aug 1, 4:26 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	33 min
Aug 2, 9:02 AM MST	Severe Thunderstorm Warning	VEF	Mohave	43 min
Aug 2, 9:50 AM MST	Severe Thunderstorm Warning	VEF	Mohave	40 min
Aug 2, 11:24 AM MST	Severe Thunderstorm Warning	VEF	Mohave	29 min
Aug 2, 12:36 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	24 min
Aug 2, 2:41 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	34 min
Aug 2, 6:02 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	30 min
Aug 6, 5:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	48 min
Aug 6, 5:54 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise, Santa Cruz	35 min
Aug 6, 6:40 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	65 min
Aug 7, 12:55 PM MST	Severe Thunderstorm Warning	TWC	Cochise	35 min
Aug 7, 1:01 PM MST	Severe Thunderstorm Warning	TWC	Cochise	44 min
Aug 7, 1:02 PM MST	Severe Thunderstorm Warning	TWC	Cochise	43 min
Aug 7, 1:17 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	43 min
Aug 7, 1:25 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min
Aug 7, 1:33 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Cochise	39 min
Aug 7, 1:56 PM MST	Severe Thunderstorm Warning	TWC	Cochise	34 min
Aug 7, 2:06 PM MST	Severe Thunderstorm Warning	TWC	Cochise	25 min
Aug 7, 2:10 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Aug 7, 2:32 PM MST	Severe Thunderstorm Warning	FGZ	Apache	28 min
Aug 7, 2:32 PM MST	Severe Thunderstorm Warning	TWC	Cochise	43 min
Aug 7, 3:09 PM MST	Severe Thunderstorm Warning	TWC	Graham	51 min
Aug 7, 3:57 PM MST	Severe Thunderstorm Warning	TWC	Graham	48 min
Aug 7, 4:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min
Aug 7, 9:05 PM MST	Severe Thunderstorm Warning	TWC	Cochise	40 min
Aug 7, 9:50 PM MST	Severe Thunderstorm Warning	TWC	Cochise	40 min
Aug 7, 11:10 PM MST	Severe Thunderstorm Warning	TWC	Cochise	50 min
Aug 8, 1:44 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Aug 9, 4:58 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	32 min
Aug 9, 5:45 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	30 min
Aug 10, 12:47 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	28 min
Aug 10, 3:36 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	39 min
Aug 10, 4:05 PM MST	Severe Thunderstorm Warning	VEF	Mohave	40 min
Aug 10, 4:12 PM MST	Severe Thunderstorm Warning	FGZ	Apache	21 min
Aug 10, 4:50 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	40 min
Aug 11, 6:47 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	28 min
Aug 11, 8:03 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	42 min
Aug 12, 2:07 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	20 min
Aug 13, 10:40 AM MST	Severe Thunderstorm Warning	VEF	Mohave	50 min
Aug 13, 10:41 AM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Aug 13, 11:47 AM MST	Severe Thunderstorm Warning	VEF	Mohave	43 min
Aug 13, 1:01 PM MST	Severe Thunderstorm Warning	PSR	La Paz	44 min
Aug 13, 1:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	50 min
Aug 13, 1:21 PM MST	Severe Thunderstorm Warning	PSR	La Paz	39 min
Aug 13, 1:39 PM MST	Severe Thunderstorm Warning	PSR	La Paz	51 min
Aug 13, 1:54 PM MST	Severe Thunderstorm Warning	PSR	La Paz	51 min
Aug 13, 1:56 PM MST	Severe Thunderstorm Warning	PSR	La Paz	34 min
Aug 13, 2:06 PM MST	Severe Thunderstorm Warning	PSR	La Paz	39 min
Aug 15, 8:21 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Aug 16, 3:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	25 min
Aug 16, 6:00 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	45 min
Aug 16, 6:50 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 17, 1:14 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	46 min
Aug 17, 2:23 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	52 min
Aug 17, 2:24 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	51 min
Aug 17, 2:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Aug 17, 3:45 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	45 min
Aug 17, 4:38 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	52 min
Aug 17, 4:41 PM MST	Severe Thunderstorm Warning	PSR	Pinal	49 min
Aug 17, 5:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Aug 17, 5:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	12 min
Aug 17, 5:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	32 min
Aug 17, 6:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	34 min
Aug 18, 1:20 PM MST	Severe Thunderstorm Warning	TWC	Pima	40 min
Aug 18, 1:57 PM MST	Severe Thunderstorm Warning	TWC	Pima	48 min
Aug 18, 2:40 PM MST	Severe Thunderstorm Warning	FGZ	Apache	35 min
Aug 18, 2:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	45 min
Aug 18, 3:17 PM MST	Severe Thunderstorm Warning	FGZ	Apache	43 min
Aug 18, 3:18 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima	42 min
Aug 18, 3:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	50 min
Aug 18, 3:56 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima	49 min
Aug 18, 4:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	44 min
Aug 18, 4:43 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima, Pinal	47 min
Aug 18, 5:14 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	61 min
Aug 18, 5:51 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	54 min
Aug 18, 6:43 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Santa Cruz	47 min
Aug 18, 7:10 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima, Santa Cruz	50 min
Aug 21, 2:07 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Aug 21, 2:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Aug 21, 2:51 PM MST	Severe Thunderstorm Warning	TWC	Pinal	54 min
Aug 21, 3:22 PM MST	Severe Thunderstorm Warning	TWC	Pima	11 min
Aug 21, 3:29 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pima, Pinal	46 min
Aug 21, 3:37 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	38 min
Aug 21, 4:03 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	42 min
Aug 21, 4:12 PM MST	Severe Thunderstorm Warning	TWC	Pinal	48 min
Aug 21, 4:16 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	32 min
Aug 21, 4:37 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	38 min
Aug 21, 4:41 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	34 min
Aug 21, 5:10 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	20 min
Aug 21, 5:16 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Santa Cruz	44 min
Aug 21, 5:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	27 min
Aug 21, 5:53 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	52 min
Aug 21, 5:58 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	22 min
Aug 21, 6:26 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	49 min
Aug 21, 6:37 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Aug 21, 6:57 PM MST	Severe Thunderstorm Warning Considerable damage threat	TWC	Pima	63 min
Aug 22, 1:34 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	26 min
Aug 22, 2:01 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	20 min
Aug 22, 4:12 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	48 min
Aug 22, 4:24 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	51 min
Aug 22, 4:34 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	41 min
Aug 22, 5:44 PM MST	Severe Thunderstorm Warning	TWC	Pinal	28 min
Aug 23, 2:43 PM MST	Severe Thunderstorm Warning	VEF	Mohave	47 min
Aug 24, 3:52 PM MST	Severe Thunderstorm Warning	FGZ	Apache	38 min
Aug 30, 4:06 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Aug 30, 4:42 PM MST	Severe Thunderstorm Warning	TWC	Pima	48 min
Aug 30, 5:44 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham, Pima	46 min
Aug 30, 5:56 PM MST	Severe Thunderstorm Warning	PSR	Gila	34 min
Aug 30, 5:56 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Aug 30, 6:29 PM MST	Severe Thunderstorm Warning	TWC	Pinal	31 min
Aug 30, 6:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Aug 30, 7:04 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	41 min
Aug 31, 3:18 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	42 min
Aug 31, 3:26 PM MST	Severe Thunderstorm Warning	FGZ	Gila	36 min
Aug 31, 3:27 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	48 min
Aug 31, 3:58 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	32 min
Aug 31, 4:06 PM MST	Severe Thunderstorm Warning	VEF	Mohave	24 min
Aug 31, 4:15 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	45 min
Aug 31, 4:29 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Aug 31, 4:33 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Aug 31, 4:46 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	44 min
Aug 31, 5:18 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Aug 31, 5:38 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	52 min
Aug 31, 5:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Aug 31, 5:47 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	43 min
Aug 31, 5:53 PM MST	Severe Thunderstorm Warning	TWC	Pima	52 min
Aug 31, 5:59 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Aug 31, 6:16 PM MST	Severe Thunderstorm Warning	PSR	Gila	44 min
Aug 31, 6:42 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	48 min
Aug 31, 6:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Aug 31, 6:56 PM MST	Severe Thunderstorm Warning	VEF	Mohave	64 min
Aug 31, 7:09 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	51 min
Aug 31, 7:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Aug 31, 8:02 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa, Pinal	73 min
Aug 31, 8:26 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Aug 31, 8:36 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	69 min
Aug 31, 8:47 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa, Pinal	58 min
Aug 31, 9:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Aug 31, 9:45 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	60 min
Aug 31, 10:04 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	26 min
Aug 31, 10:05 PM MST	Severe Thunderstorm Warning	VEF	Mohave	40 min
Sep 1, 1:18 AM MST	Severe Thunderstorm Warning	VEF	Mohave	57 min
Sep 1, 2:23 AM MST	Severe Thunderstorm Warning	VEF	Mohave	52 min
Sep 1, 11:33 AM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	42 min
Sep 1, 12:23 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	52 min
Sep 12, 1:36 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	39 min
Sep 12, 2:14 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	46 min
Sep 12, 3:08 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	52 min
Sep 12, 3:10 PM MST	Severe Thunderstorm Warning	PSR	Gila	50 min
Sep 12, 3:59 PM MST	Severe Thunderstorm Warning	TWC	Cochise	22 min
Sep 12, 5:15 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	45 min
Sep 12, 5:58 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	32 min
Sep 12, 6:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	30 min
Sep 12, 6:47 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	43 min
Sep 12, 7:25 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	50 min
Sep 12, 7:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	21 min
Sep 12, 7:50 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Sep 12, 8:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Sep 12, 9:04 PM MST	Severe Thunderstorm Warning	PSR	Pinal	26 min
Sep 12, 9:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	35 min
Sep 12, 10:07 PM MST	Severe Thunderstorm Warning	PSR	Pinal	38 min
Sep 12, 10:15 PM MST	Severe Thunderstorm Warning	TWC	Pinal	45 min
Sep 13, 12:59 AM MST	Severe Thunderstorm Warning	PSR	Gila	46 min
Sep 13, 1:36 AM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	39 min
Sep 13, 1:38 AM MST	Severe Thunderstorm Warning	TWC	Graham	27 min
Sep 13, 6:41 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Sep 13, 6:45 AM MST	Severe Thunderstorm Warning	PSR	Gila	45 min
Sep 13, 12:28 PM MST	Severe Thunderstorm Warning	TWC	Cochise	47 min
Sep 13, 12:38 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	23 min
Sep 13, 12:41 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	49 min
Sep 13, 12:51 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Sep 13, 1:08 PM MST	Severe Thunderstorm Warning	TWC	Cochise	52 min
Sep 13, 1:14 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	46 min
Sep 13, 1:33 PM MST	Severe Thunderstorm Warning	TWC	Pima	27 min
Sep 13, 1:35 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	25 min
Sep 13, 2:02 PM MST	Severe Thunderstorm Warning	TWC	Cochise	43 min
Sep 13, 2:15 PM MST	Severe Thunderstorm Warning	TWC	Cochise	30 min
Sep 13, 2:16 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	29 min
Sep 13, 2:28 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	34 min
Sep 13, 2:45 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	15 min
Sep 13, 2:57 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	48 min
Sep 13, 3:01 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	29 min
Sep 13, 4:25 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	50 min
Sep 13, 5:35 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	40 min
Sep 13, 6:02 PM MST	Severe Thunderstorm Warning	TWC	Pinal	32 min
Sep 13, 6:05 PM MST	Severe Thunderstorm Warning	PSR	Gila	40 min
Sep 15, 2:57 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	48 min
Sep 15, 3:59 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	21 min
Sep 20, 5:21 PM MST	Severe Thunderstorm Warning	VEF	Mohave	24 min
Oct 24, 12:05 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	40 min
Oct 24, 1:37 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Oct 24, 1:50 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Dec 22, 2:30 PM MST	Severe Thunderstorm Warning	PSR	Yuma	45 min
Dec 22, 5:21 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	39 min
Dec 22, 5:54 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	51 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 2022 2024

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.