Alert archive / Arizona / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Arizona, 2015

376 severe thunderstorm warnings in 2015. 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 2015. Tap one for its archive.

Severe Thunderstorm Warnings: 376
Busiest month: August137 severe thunderstorm warnings
Busiest day: October 20, 201531 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.

80 of 376 severe thunderstorm warnings covering Arizona in 2015 had a qualifying storm report inside them; 159 of 295 hail, wind and damage reports fell inside a warning, on average 16 minutes after it went out.

Arizona, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	376	80	79%	295	54%	16 min

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tucson, AZ: severe thunderstorm warnings	123	29	76%	80	55%	16 min
NWS Phoenix, AZ: severe thunderstorm warnings	85	30	65%	153	52%	15 min
NWS Las Vegas, NV: severe thunderstorm warnings	66	16	76%	81	43%	22 min
NWS Flagstaff, AZ: severe thunderstorm warnings	144	13	91%	39	51%	13 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
May 4, 3:38 PM MST	Severe Thunderstorm Warning	PSR	Yuma	52 min
Jun 5, 3:46 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	29 min
Jun 5, 4:18 PM MST	Severe Thunderstorm Warning	PSR	Gila	12 min
Jun 5, 4:21 PM MST	Severe Thunderstorm Warning	FGZ	Gila	24 min
Jun 5, 4:44 PM MST	Severe Thunderstorm Warning	PSR	Gila	16 min
Jun 5, 4:45 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	30 min
Jun 5, 5:10 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	20 min
Jun 5, 5:35 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	25 min
Jun 5, 9:11 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	19 min
Jun 5, 9:33 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	27 min
Jun 5, 10:16 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	29 min
Jun 6, 11:53 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	22 min
Jun 13, 9:45 PM MST	Severe Thunderstorm Warning	VEF	Mohave	45 min
Jun 16, 4:07 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	38 min
Jun 16, 5:25 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	35 min
Jun 22, 7:05 PM MST	Severe Thunderstorm Warning	TWC	Cochise	40 min
Jun 24, 12:47 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min
Jun 24, 3:27 PM MST	Severe Thunderstorm Warning	TWC	Graham	33 min
Jun 26, 2:37 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	38 min
Jun 26, 2:51 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	24 min
Jun 26, 3:15 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	30 min
Jun 26, 5:34 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	41 min
Jun 26, 5:36 PM MST	Severe Thunderstorm Warning	PSR	Gila	39 min
Jun 26, 6:44 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	31 min
Jun 27, 3:11 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	49 min
Jun 27, 3:50 PM MST	Severe Thunderstorm Warning	TWC	Pinal	40 min
Jun 27, 5:35 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	40 min
Jun 28, 3:10 PM MST	Severe Thunderstorm Warning	VEF	Mohave	35 min
Jun 28, 5:38 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	52 min
Jun 28, 6:16 PM MST	Severe Thunderstorm Warning	PSR	Yuma	44 min
Jun 29, 2:29 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Jun 29, 3:05 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	40 min
Jun 29, 3:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	47 min
Jun 29, 3:30 PM MST	Severe Thunderstorm Warning	TWC	Pima	45 min
Jun 29, 3:39 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	51 min
Jun 29, 4:16 PM MST	Severe Thunderstorm Warning	TWC	Pima	44 min
Jun 29, 4:22 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	38 min
Jun 29, 4:49 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	26 min
Jun 29, 5:00 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	45 min
Jun 29, 5:20 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	25 min
Jun 29, 5:34 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	26 min
Jun 29, 6:59 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	31 min
Jun 29, 7:04 PM MST	Severe Thunderstorm Warning	VEF	Mohave	41 min
Jun 29, 7:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	49 min
Jun 29, 7:30 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	30 min
Jun 29, 7:58 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	32 min
Jun 29, 9:43 PM MST	Severe Thunderstorm Warning	PSR	La Paz	32 min
Jun 29, 10:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	25 min
Jun 30, 12:33 PM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Jun 30, 1:03 PM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Jun 30, 3:14 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	31 min
Jun 30, 3:36 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Navajo	24 min
Jun 30, 3:40 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Jun 30, 4:02 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	28 min
Jun 30, 4:06 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	24 min
Jun 30, 4:29 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	32 min
Jun 30, 4:38 PM MST	Severe Thunderstorm Warning	TWC	Pinal	37 min
Jun 30, 5:19 PM MST	Severe Thunderstorm Warning	TWC	Pima	41 min
Jun 30, 5:30 PM MST	Severe Thunderstorm Warning	TWC	Cochise	30 min
Jun 30, 5:54 PM MST	Severe Thunderstorm Warning	TWC	Pima	20 min
Jun 30, 6:47 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	43 min
Jun 30, 7:01 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	44 min
Jun 30, 7:09 PM MST	Severe Thunderstorm Warning	TWC	Cochise	36 min
Jun 30, 7:27 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	63 min
Jun 30, 7:28 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	32 min
Jun 30, 7:49 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	26 min
Jun 30, 8:21 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	54 min
Jun 30, 8:27 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	43 min
Jun 30, 9:10 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	35 min
Jun 30, 9:49 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	56 min
Jun 30, 10:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Jun 30, 10:44 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	46 min
Jul 1, 12:01 AM MST	Severe Thunderstorm Warning	VEF	Mohave	59 min
Jul 1, 1:13 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	32 min
Jul 1, 1:53 PM MST	Severe Thunderstorm Warning	TWC	Pima	37 min
Jul 1, 2:17 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	28 min
Jul 1, 2:30 PM MST	Severe Thunderstorm Warning	FGZ	Apache	30 min
Jul 1, 2:36 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	24 min
Jul 1, 2:43 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	32 min
Jul 1, 3:05 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	25 min
Jul 1, 3:12 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	48 min
Jul 1, 3:29 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	16 min
Jul 1, 3:30 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	20 min
Jul 1, 4:15 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	30 min
Jul 1, 4:21 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	24 min
Jul 1, 4:49 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	12 min
Jul 1, 5:24 PM MST	Severe Thunderstorm Warning	VEF	Mohave	36 min
Jul 1, 5:43 PM MST	Severe Thunderstorm Warning	FGZ	Apache	32 min
Jul 1, 5:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	31 min
Jul 1, 6:02 PM MST	Severe Thunderstorm Warning	FGZ	Apache	28 min
Jul 1, 7:11 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	34 min
Jul 1, 10:15 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	15 min
Jul 2, 7:22 PM MST	Severe Thunderstorm Warning	TWC	Cochise	23 min
Jul 2, 11:21 PM MST	Severe Thunderstorm Warning	PSR	Pinal	24 min
Jul 3, 6:36 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Jul 4, 3:44 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	46 min
Jul 5, 1:52 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 5, 4:57 PM MST	Severe Thunderstorm Warning	PSR	La Paz	33 min
Jul 7, 11:44 AM MST	Severe Thunderstorm Warning	TWC	Cochise	31 min
Jul 7, 12:34 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	26 min
Jul 7, 2:49 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	26 min
Jul 7, 3:00 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	30 min
Jul 8, 12:45 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	30 min
Jul 9, 6:26 PM MST	Severe Thunderstorm Warning	TWC	Pinal	34 min
Jul 10, 2:38 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	52 min
Jul 11, 2:24 PM MST	Severe Thunderstorm Warning	TWC	Graham	36 min
Jul 11, 4:14 PM MST	Severe Thunderstorm Warning	TWC	Cochise	29 min
Jul 12, 2:01 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	29 min
Jul 12, 2:20 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	26 min
Jul 12, 2:28 PM MST	Severe Thunderstorm Warning	TWC	Graham	47 min
Jul 12, 2:54 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 12, 5:39 PM MST	Severe Thunderstorm Warning	TWC	Cochise	51 min
Jul 13, 5:45 PM MST	Severe Thunderstorm Warning	TWC	Cochise	45 min
Jul 13, 5:48 PM MST	Severe Thunderstorm Warning	TWC	Cochise	27 min
Jul 14, 6:33 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Jul 16, 5:48 PM MST	Severe Thunderstorm Warning	TWC	Pima	27 min
Jul 17, 5:22 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 17, 5:54 PM MST	Severe Thunderstorm Warning	VEF	Mohave	36 min
Jul 17, 10:27 PM MST	Severe Thunderstorm Warning	VEF	Mohave	48 min
Jul 18, 12:45 PM MST	Severe Thunderstorm Warning	VEF	Mohave	44 min
Jul 18, 12:57 PM MST	Severe Thunderstorm Warning	VEF	Mohave	33 min
Jul 18, 1:27 PM MST	Severe Thunderstorm Warning	VEF	Mohave	58 min
Jul 18, 1:36 PM MST	Severe Thunderstorm Warning	VEF	Mohave	39 min
Jul 18, 1:44 PM MST	Severe Thunderstorm Warning	VEF	Mohave	61 min
Jul 18, 2:11 PM MST	Severe Thunderstorm Warning	VEF	Mohave	49 min
Jul 18, 3:19 PM MST	Severe Thunderstorm Warning	VEF	Mohave	26 min
Jul 18, 4:45 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	30 min
Jul 24, 5:52 PM MST	Severe Thunderstorm Warning	TWC	Cochise	23 min
Jul 28, 5:22 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Jul 30, 3:02 PM MST	Severe Thunderstorm Warning	VEF	Mohave	58 min
Jul 30, 3:20 PM MST	Severe Thunderstorm Warning	VEF	Mohave	55 min
Jul 31, 2:07 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	23 min
Jul 31, 2:20 PM MST	Severe Thunderstorm Warning	PSR	Pinal	25 min
Jul 31, 3:48 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Aug 1, 12:07 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Aug 1, 12:38 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	37 min
Aug 1, 1:20 PM MST	Severe Thunderstorm Warning	TWC	Pima	25 min
Aug 1, 3:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min
Aug 2, 2:17 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min
Aug 2, 4:27 PM MST	Severe Thunderstorm Warning	FGZ	Apache	33 min
Aug 2, 4:59 PM MST	Severe Thunderstorm Warning	FGZ	Apache	31 min
Aug 2, 5:49 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	41 min
Aug 6, 1:27 PM MST	Severe Thunderstorm Warning	PSR	La Paz	33 min
Aug 6, 1:30 PM MST	Severe Thunderstorm Warning	PSR	La Paz	30 min
Aug 6, 2:07 PM MST	Severe Thunderstorm Warning	PSR	La Paz	23 min
Aug 6, 2:32 PM MST	Severe Thunderstorm Warning	PSR	La Paz	28 min
Aug 6, 3:14 PM MST	Severe Thunderstorm Warning	PSR	La Paz	16 min
Aug 7, 7:30 AM MST	Severe Thunderstorm Warning	VEF	Mohave	30 min
Aug 7, 7:55 AM MST	Severe Thunderstorm Warning	VEF	Mohave	35 min
Aug 7, 11:05 AM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	40 min
Aug 7, 11:21 AM MST	Severe Thunderstorm Warning	TWC	Graham	24 min
Aug 7, 11:56 AM MST	Severe Thunderstorm Warning	PSR	Gila	49 min
Aug 7, 11:59 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	46 min
Aug 7, 12:48 PM MST	Severe Thunderstorm Warning	TWC	Pima	27 min
Aug 7, 12:57 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	33 min
Aug 7, 1:33 PM MST	Severe Thunderstorm Warning	TWC	Pinal	27 min
Aug 7, 1:34 PM MST	Severe Thunderstorm Warning	VEF	Mohave	26 min
Aug 7, 1:43 PM MST	Severe Thunderstorm Warning	TWC	Pinal	47 min
Aug 7, 1:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	31 min
Aug 7, 2:28 PM MST	Severe Thunderstorm Warning	PSR	Pinal	17 min
Aug 7, 2:43 PM MST	Severe Thunderstorm Warning	TWC	Pima	15 min
Aug 7, 2:47 PM MST	Severe Thunderstorm Warning	VEF	Mohave	28 min
Aug 7, 5:05 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	25 min
Aug 7, 5:08 PM MST	Severe Thunderstorm Warning	PSR	Pinal	22 min
Aug 7, 6:07 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Aug 7, 6:25 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Aug 8, 1:04 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	26 min
Aug 8, 1:17 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	28 min
Aug 8, 2:45 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	30 min
Aug 9, 12:58 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	47 min
Aug 9, 2:10 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	50 min
Aug 9, 2:42 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	33 min
Aug 9, 3:00 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	21 min
Aug 11, 9:09 AM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	36 min
Aug 11, 11:30 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	30 min
Aug 11, 12:00 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	33 min
Aug 11, 12:52 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Aug 11, 2:38 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	16 min
Aug 11, 3:23 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	37 min
Aug 11, 3:39 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	27 min
Aug 11, 3:42 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	48 min
Aug 11, 3:54 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	36 min
Aug 11, 5:32 PM MST	Severe Thunderstorm Warning	TWC	Graham	28 min
Aug 11, 5:59 PM MST	Severe Thunderstorm Warning	TWC	Graham	46 min
Aug 11, 6:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	40 min
Aug 11, 6:33 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	27 min
Aug 11, 7:11 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	49 min
Aug 11, 7:27 PM MST	Severe Thunderstorm Warning	TWC	Pima	33 min
Aug 11, 7:47 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min
Aug 11, 8:07 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Aug 11, 8:10 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	50 min
Aug 11, 8:43 PM MST	Severe Thunderstorm Warning	PSR	Pinal	32 min
Aug 11, 9:01 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	44 min
Aug 11, 9:41 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	49 min
Aug 12, 2:28 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	47 min
Aug 12, 5:13 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	32 min
Aug 12, 7:04 PM MST	Severe Thunderstorm Warning	PSR	La Paz	26 min
Aug 13, 3:16 PM MST	Severe Thunderstorm Warning	VEF	Mohave	44 min
Aug 15, 7:12 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 20, 1:06 PM MST	Severe Thunderstorm Warning	TWC	Cochise	24 min
Aug 20, 1:59 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	46 min
Aug 20, 2:16 PM MST	Severe Thunderstorm Warning	TWC	Cochise	29 min
Aug 20, 2:36 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	39 min
Aug 20, 2:47 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	28 min
Aug 20, 3:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	31 min
Aug 20, 3:22 PM MST	Severe Thunderstorm Warning	TWC	Pima	38 min
Aug 20, 3:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	30 min
Aug 20, 4:14 PM MST	Severe Thunderstorm Warning	TWC	Pima	46 min
Aug 20, 4:57 PM MST	Severe Thunderstorm Warning	TWC	Pima	63 min
Aug 20, 5:58 PM MST	Severe Thunderstorm Warning	TWC	Pima	32 min
Aug 21, 3:29 PM MST	Severe Thunderstorm Warning	TWC	Cochise	31 min
Aug 21, 3:50 PM MST	Severe Thunderstorm Warning	TWC	Cochise	25 min
Aug 22, 12:26 PM MST	Severe Thunderstorm Warning	TWC	Cochise	49 min
Aug 22, 2:00 PM MST	Severe Thunderstorm Warning	TWC	Cochise	30 min
Aug 22, 2:25 PM MST	Severe Thunderstorm Warning	TWC	Cochise	50 min
Aug 22, 3:18 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	27 min
Aug 22, 3:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	30 min
Aug 22, 3:47 PM MST	Severe Thunderstorm Warning	TWC	Pima	43 min
Aug 22, 4:07 PM MST	Severe Thunderstorm Warning	TWC	Pima	53 min
Aug 23, 1:58 PM MST	Severe Thunderstorm Warning	FGZ	Gila	17 min
Aug 23, 2:13 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	32 min
Aug 23, 2:38 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	22 min
Aug 23, 3:13 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	21 min
Aug 23, 3:53 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	22 min
Aug 23, 4:35 PM MST	Severe Thunderstorm Warning	PSR	Gila	25 min
Aug 23, 5:19 PM MST	Severe Thunderstorm Warning	PSR	Gila	26 min
Aug 23, 5:22 PM MST	Severe Thunderstorm Warning	TWC	Pinal	38 min
Aug 23, 6:00 PM MST	Severe Thunderstorm Warning	TWC	Pinal	30 min
Aug 23, 7:13 PM MST	Severe Thunderstorm Warning	TWC	Pima	32 min
Aug 24, 2:52 PM MST	Severe Thunderstorm Warning	FGZ	Gila	23 min
Aug 24, 3:16 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	17 min
Aug 24, 8:42 PM MST	Severe Thunderstorm Warning	TWC	Cochise	18 min
Aug 25, 1:35 PM MST	Severe Thunderstorm Warning	TWC	Pima	25 min
Aug 25, 2:24 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Aug 25, 4:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise	33 min
Aug 25, 4:45 PM MST	Severe Thunderstorm Warning	TWC	Graham	30 min
Aug 25, 5:17 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	28 min
Aug 26, 1:25 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	13 min
Aug 26, 1:53 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	31 min
Aug 26, 2:02 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	4 min
Aug 26, 2:12 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	48 min
Aug 26, 2:44 PM MST	Severe Thunderstorm Warning	TWC	Cochise	46 min
Aug 26, 5:48 PM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Aug 27, 11:35 AM MST	Severe Thunderstorm Warning	FGZ	Navajo	25 min
Aug 27, 1:22 PM MST	Severe Thunderstorm Warning	FGZ	Gila	38 min
Aug 27, 2:40 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	50 min
Aug 27, 3:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	47 min
Aug 27, 3:49 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	24 min
Aug 27, 4:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	37 min
Aug 27, 4:25 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Aug 27, 4:56 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Aug 27, 6:44 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	31 min
Aug 29, 5:51 PM MST	Severe Thunderstorm Warning	PSR	Pinal	39 min
Aug 29, 7:27 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Aug 29, 7:41 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Aug 29, 8:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 29, 8:36 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Aug 30, 12:17 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	28 min
Aug 30, 12:52 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	23 min
Aug 30, 1:37 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	23 min
Aug 30, 4:44 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	31 min
Aug 30, 5:16 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	18 min
Aug 30, 6:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	37 min
Aug 31, 11:47 AM MST	Severe Thunderstorm Warning	FGZ	Navajo	28 min
Aug 31, 12:08 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	37 min
Aug 31, 12:38 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	22 min
Aug 31, 1:12 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	33 min
Aug 31, 1:20 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	40 min
Aug 31, 1:26 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	34 min
Aug 31, 1:33 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	27 min
Aug 31, 4:27 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	33 min
Aug 31, 6:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min
Aug 31, 7:10 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Aug 31, 7:46 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	29 min
Aug 31, 7:49 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	26 min
Aug 31, 8:04 PM MST	Severe Thunderstorm Warning	TWC	Pima	26 min
Aug 31, 8:17 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	28 min
Aug 31, 8:40 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Sep 2, 1:15 PM MST	Severe Thunderstorm Warning	TWC	Pima	30 min
Sep 2, 1:58 PM MST	Severe Thunderstorm Warning	TWC	Cochise	32 min
Sep 2, 2:13 PM MST	Severe Thunderstorm Warning	TWC	Cochise	32 min
Sep 2, 2:28 PM MST	Severe Thunderstorm Warning	TWC	Cochise	20 min
Sep 2, 2:52 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	23 min
Sep 2, 3:35 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	25 min
Sep 2, 5:58 PM MST	Severe Thunderstorm Warning	TWC	Pima	32 min
Sep 3, 1:57 PM MST	Severe Thunderstorm Warning	TWC	Pima	33 min
Sep 3, 3:36 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	24 min
Sep 3, 5:32 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	28 min
Sep 8, 12:52 PM MST	Severe Thunderstorm Warning	TWC	Cochise	23 min
Sep 8, 4:58 PM MST	Severe Thunderstorm Warning	PSR	Yuma	32 min
Sep 12, 4:51 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Sep 12, 5:03 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	42 min
Sep 12, 5:52 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	38 min
Sep 13, 2:40 PM MST	Severe Thunderstorm Warning	FGZ	Gila	50 min
Sep 13, 2:51 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Navajo	24 min
Sep 14, 1:34 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	26 min
Sep 14, 1:34 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	41 min
Sep 14, 7:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Sep 14, 7:36 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Sep 22, 11:20 AM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	40 min
Sep 22, 2:18 PM MST	Severe Thunderstorm Warning	TWC	Pima	27 min
Sep 22, 2:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min
Sep 22, 3:08 PM MST	Severe Thunderstorm Warning	TWC	Cochise	37 min
Sep 22, 4:10 PM MST	Severe Thunderstorm Warning	TWC	Cochise	35 min
Sep 22, 6:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Oct 4, 6:08 PM MST	Severe Thunderstorm Warning	VEF	Mohave	37 min
Oct 5, 4:38 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	37 min
Oct 5, 5:07 PM MST	Severe Thunderstorm Warning	FGZ	Apache	26 min
Oct 5, 7:11 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	34 min
Oct 6, 10:36 AM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	54 min
Oct 6, 11:48 AM MST	Severe Thunderstorm Warning	PSR	Pinal	27 min
Oct 6, 12:19 PM MST	Severe Thunderstorm Warning	TWC	Pima	26 min
Oct 6, 12:26 PM MST	Severe Thunderstorm Warning	TWC	Pima	49 min
Oct 6, 1:03 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	27 min
Oct 6, 1:28 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	32 min
Oct 6, 2:43 PM MST	Severe Thunderstorm Warning	TWC	Graham, Greenlee	32 min
Oct 6, 2:57 PM MST	Severe Thunderstorm Warning	PSR	Pinal	33 min
Oct 6, 3:25 PM MST	Severe Thunderstorm Warning	PSR	Pinal	35 min
Oct 6, 6:06 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	24 min
Oct 16, 1:19 PM MST	Severe Thunderstorm Warning	TWC	Pima	41 min
Oct 16, 1:45 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	30 min
Oct 18, 2:05 PM MST	Severe Thunderstorm Warning	TWC	Pima	25 min
Oct 18, 3:51 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	24 min
Oct 18, 4:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	34 min
Oct 18, 4:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	16 min
Oct 18, 6:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	24 min
Oct 18, 7:28 PM MST	Severe Thunderstorm Warning	VEF	Mohave	47 min
Oct 18, 7:45 PM MST	Severe Thunderstorm Warning	VEF	Mohave	30 min
Oct 18, 8:09 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	36 min
Oct 18, 8:13 PM MST	Severe Thunderstorm Warning	VEF	Mohave	47 min
Oct 18, 8:59 PM MST	Severe Thunderstorm Warning	VEF	Mohave	46 min
Oct 18, 9:45 PM MST	Severe Thunderstorm Warning	VEF	Mohave	60 min
Oct 18, 10:37 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Oct 18, 11:34 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	41 min
Oct 19, 12:01 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	29 min
Oct 19, 2:59 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	16 min
Oct 19, 3:15 AM MST	Severe Thunderstorm Warning	FGZ	Coconino	30 min
Oct 19, 5:24 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	51 min
Oct 19, 6:38 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	23 min
Oct 19, 9:36 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Oct 19, 9:52 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	23 min
Oct 19, 10:03 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	42 min
Oct 19, 10:11 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	49 min
Oct 19, 10:26 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	49 min
Oct 19, 10:56 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	34 min
Oct 19, 11:20 PM MST	Severe Thunderstorm Warning	VEF	Mohave	55 min
Oct 20, 1:56 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila	24 min
Oct 20, 3:08 AM MST	Severe Thunderstorm Warning	FGZ	Apache, Navajo	37 min
Oct 20, 4:08 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	22 min
Oct 20, 4:21 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Oct 20, 4:25 AM MST	Severe Thunderstorm Warning	FGZ	Navajo	20 min
Oct 20, 5:09 AM MST	Severe Thunderstorm Warning	FGZ	Yavapai	41 min
Oct 20, 5:27 AM MST	Severe Thunderstorm Warning	FGZ	Yavapai	33 min
Oct 20, 7:22 AM MST	Severe Thunderstorm Warning	VEF	Mohave	23 min
Oct 20, 9:13 AM MST	Severe Thunderstorm Warning	FGZ	Navajo	21 min
Oct 20, 9:37 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	23 min
Oct 20, 9:59 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	15 min
Oct 20, 10:08 AM MST	Severe Thunderstorm Warning	TWC	Cochise	17 min
Oct 20, 10:22 AM MST	Severe Thunderstorm Warning	TWC	Greenlee	23 min
Oct 20, 10:24 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	36 min
Oct 20, 10:46 AM MST	Severe Thunderstorm Warning	FGZ	Gila	29 min
Oct 20, 10:47 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	43 min
Oct 20, 11:03 AM MST	Severe Thunderstorm Warning	FGZ	Apache	27 min
Oct 20, 11:28 AM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Navajo	32 min
Oct 20, 11:44 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	46 min
Oct 20, 12:09 PM MST	Severe Thunderstorm Warning	FGZ	Apache	36 min
Oct 20, 12:57 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Oct 20, 1:39 PM MST	Severe Thunderstorm Warning	FGZ	Apache	21 min
Oct 20, 5:01 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Gila, Navajo	29 min
Oct 20, 5:27 PM MST	Severe Thunderstorm Warning	FGZ	Apache, Gila, Navajo	33 min
Oct 20, 9:43 PM MST	Severe Thunderstorm Warning	TWC	Pinal	32 min
Oct 20, 11:49 PM MST	Severe Thunderstorm Warning	TWC	Cochise	26 min
Oct 21, 1:02 AM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	43 min
Oct 21, 2:00 AM MST	Severe Thunderstorm Warning	TWC	Graham	45 min
Oct 29, 12:38 PM MST	Severe Thunderstorm Warning	PSR	Pinal	52 min
Oct 29, 1:42 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 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 2014 2016

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.