Alert archive / Arizona / Flash Flood Warnings

Flash Flood Warnings in Arizona, 2024

263 flash flood 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 flash flood warnings reaches back to 1986.

Flash Flood Warnings by county

Each county as a circle sized by its count in 2024. Tap one for its archive.

Flash Flood Warnings: 263
Busiest month: July117 flash flood warnings
Busiest day: July 26, 202416 flash flood warnings

Over time

By month

Warning verification

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

49 of 263 flash flood warnings covering Arizona in 2024 had a flash flood report inside them; 75 of 106 flash flood reports fell inside a warning, on average 87 minutes after it went out.

Arizona, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Flash flood warnings	263	49	81%	106	71%	87 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Phoenix, AZ: flash flood warnings	49	11	78%	12	100%	63 min
NWS Flagstaff, AZ: flash flood warnings	92	17	82%	38	61%	128 min
NWS Tucson, AZ: flash flood warnings	102	18	82%	53	70%	64 min
NWS Las Vegas, NV: flash flood warnings	63	15	76%	34	56%	60 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
Mar 31, 9:13 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Jun 21, 12:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	5 hr
Jun 21, 2:03 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jun 21, 9:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	3 hr
Jun 22, 2:50 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jun 22, 5:32 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jun 23, 3:11 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Jun 23, 4:13 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	2 hr
Jun 23, 4:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jun 23, 8:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jun 24, 1:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jun 24, 3:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Jun 24, 4:04 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jun 24, 4:33 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jun 24, 5:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	6 hr
Jun 24, 5:19 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jun 24, 6:05 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jun 24, 8:28 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	2 hr
Jun 25, 12:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	83 min
Jun 25, 1:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	2 hr
Jun 25, 1:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jun 25, 4:07 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila, Navajo	3 hr
Jun 25, 7:03 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jun 25, 7:52 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Jun 25, 9:00 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jun 26, 2:39 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	117 min
Jun 26, 3:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	4 hr
Jun 27, 12:52 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jun 27, 1:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	3 hr
Jun 27, 2:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	2 hr
Jun 27, 3:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	2 hr
Jun 27, 4:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Navajo	3 hr
Jun 28, 3:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jun 28, 3:18 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jun 30, 2:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	3 hr
Jun 30, 4:43 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jun 30, 5:44 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila, Navajo	3 hr
Jun 30, 6:41 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jul 1, 2:08 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Jul 1, 2:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 2, 12:41 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	3 hr
Jul 2, 1:12 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	3 hr
Jul 2, 3:50 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 5, 3:54 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	111 min
Jul 11, 5:28 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Jul 11, 8:35 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	104 min
Jul 12, 4:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	6 hr
Jul 12, 4:30 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	6 hr
Jul 14, 12:32 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 14, 2:53 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Jul 14, 3:35 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	2 hr
Jul 14, 5:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jul 14, 5:29 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Pima	118 min
Jul 14, 5:48 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Pima	3 hr
Jul 14, 6:47 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 14, 7:01 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Jul 14, 7:08 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 14, 8:24 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	2 hr
Jul 14, 9:57 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 14, 10:46 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 15, 2:28 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 15, 4:54 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 15, 6:11 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jul 15, 7:06 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 16, 7:01 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	89 min
Jul 16, 7:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila, Yavapai	3 hr
Jul 16, 9:07 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	113 min
Jul 17, 3:57 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 17, 4:51 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	2 hr
Jul 17, 5:15 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 17, 5:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	106 min
Jul 18, 2:28 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 18, 5:41 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 18, 6:13 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jul 18, 6:37 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 18, 8:43 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 19, 4:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 19, 5:35 PM MST	Flash Flood Warning	PSR	Gila	3 hr
Jul 19, 7:20 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 20, 2:49 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	5 hr
Jul 20, 4:43 PM MST	Flash Flood Warning	TWC	Pima, Santa Cruz	3 hr
Jul 20, 4:44 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Jul 20, 6:03 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 21, 2:13 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	4 hr
Jul 21, 2:16 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Jul 21, 3:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 21, 3:56 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Jul 21, 5:28 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 21, 6:14 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 21, 6:47 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 22, 12:12 AM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Jul 22, 4:50 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	4 hr
Jul 22, 5:49 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	4 hr
Jul 23, 7:23 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 24, 4:09 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 24, 5:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	5 hr
Jul 24, 6:01 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	119 min
Jul 25, 1:20 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 25, 1:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Navajo	3 hr
Jul 25, 2:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Navajo	3 hr
Jul 25, 3:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 25, 4:20 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 25, 4:26 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	109 min
Jul 25, 4:42 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa, Pinal	3 hr
Jul 25, 5:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Jul 25, 5:09 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	3 hr
Jul 25, 5:26 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 25, 5:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	6 hr
Jul 25, 6:01 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 25, 6:25 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	4 hr
Jul 25, 6:37 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 25, 6:47 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	3 hr
Jul 25, 6:47 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Jul 25, 6:55 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Yuma	3 hr
Jul 25, 7:02 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 25, 7:23 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 25, 7:46 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	3 hr
Jul 25, 8:18 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	2 hr
Jul 25, 9:24 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Jul 26, 1:36 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	4 hr
Jul 26, 7:02 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 26, 7:45 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz, Maricopa	3 hr
Jul 26, 8:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 27, 12:34 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Santa Cruz	3 hr
Jul 27, 1:20 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 27, 1:46 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 27, 2:39 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Jul 27, 4:11 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Jul 27, 4:27 PM MST	Flash Flood Warning Considerable damage threat	TWC	Graham, Greenlee	3 hr
Jul 27, 4:48 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 27, 5:06 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	2 hr
Jul 27, 6:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Greenlee	3 hr
Jul 27, 7:11 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Jul 27, 7:32 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	3 hr
Jul 27, 8:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	3 hr
Jul 28, 12:47 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 28, 1:10 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Santa Cruz	3 hr
Jul 28, 1:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 28, 2:29 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Jul 28, 2:40 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Jul 28, 3:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 28, 3:17 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Graham	2 hr
Jul 28, 3:22 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 28, 3:53 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Jul 28, 4:10 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Pinal	3 hr
Jul 28, 4:46 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 28, 5:42 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 29, 7:14 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	2 hr
Jul 29, 8:33 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	87 min
Jul 30, 12:51 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Jul 31, 1:11 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise, Pima	3 hr
Jul 31, 2:34 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 31, 3:53 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 1, 4:44 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	2 hr
Aug 2, 1:51 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	2 hr
Aug 2, 6:41 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 2, 7:24 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Aug 3, 12:32 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 3, 3:41 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	111 min
Aug 3, 4:34 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 3, 4:37 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	100 min
Aug 3, 5:51 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 3, 7:00 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	2 hr
Aug 3, 7:05 PM MST	Flash Flood Warning	PSR	Maricopa	4 hr
Aug 4, 4:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 4, 5:28 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Aug 4, 10:13 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 6, 2:25 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Aug 6, 4:23 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 6, 5:30 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 6, 5:35 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 7, 1:56 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 7, 3:24 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Aug 7, 4:10 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Aug 7, 4:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 7, 7:18 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 7, 7:44 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 7, 7:45 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	3 hr
Aug 7, 7:48 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 7, 8:03 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 7, 8:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 8, 3:11 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 8, 4:53 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Aug 8, 5:04 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	2 hr
Aug 10, 12:15 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 1:17 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 4:23 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pinal	2 hr
Aug 10, 4:31 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 4:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 10, 4:40 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Aug 10, 5:06 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 5:23 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	8 hr
Aug 10, 5:44 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 6:13 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	5 hr
Aug 10, 6:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 10, 6:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Aug 10, 7:00 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 10, 7:21 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 10, 8:07 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 11, 12:00 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 11, 2:15 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 11, 2:17 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 11, 2:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	4 hr
Aug 11, 4:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 11, 5:36 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	114 min
Aug 12, 1:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	4 hr
Aug 12, 2:01 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 12, 2:17 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	4 hr
Aug 12, 3:13 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Aug 12, 3:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 12, 3:36 PM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Aug 12, 4:15 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 12, 4:18 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima, Santa Cruz	2 hr
Aug 12, 4:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 13, 11:38 AM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	8 hr
Aug 13, 12:34 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Aug 13, 2:21 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Aug 13, 9:26 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	7 hr
Aug 16, 8:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 17, 12:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 17, 1:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	12 hr
Aug 17, 2:16 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 17, 2:51 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 17, 2:53 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	4 hr
Aug 17, 5:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 17, 11:42 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 19, 1:51 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	3 hr
Aug 19, 4:44 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Aug 21, 10:06 AM MST	Flash Flood Warning Considerable damage threat	TWC	Santa Cruz	3 hr
Aug 21, 1:15 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	5 hr
Aug 21, 1:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	11 hr
Aug 21, 2:48 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila, Navajo	6 hr
Aug 21, 3:36 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Navajo	6 hr
Aug 21, 3:37 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 21, 3:41 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	6 hr
Aug 21, 3:44 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	6 hr
Aug 21, 4:50 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 21, 5:03 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	6 hr
Aug 21, 5:21 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 21, 5:32 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 22, 12:03 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	14 hr
Aug 22, 12:14 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 22, 12:42 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr
Aug 22, 12:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache	5 hr
Aug 22, 1:17 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 22, 2:33 PM MST	Flash Flood Warning	TWC	Pinal	3 hr
Aug 22, 2:59 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 22, 3:14 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Aug 22, 5:41 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 23, 12:33 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	3 hr
Aug 23, 3:33 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Aug 23, 4:04 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 23, 4:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	14 hr
Aug 23, 4:29 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Aug 23, 4:56 PM MST	Flash Flood Warning	TWC	Pinal	3 hr
Aug 25, 4:06 PM MST	Flash Flood Warning	TWC	Cochise	2 hr
Aug 28, 3:35 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila	3 hr
Aug 31, 1:39 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Gila, Yavapai	3 hr
Sep 7, 2:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Sep 7, 2:48 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Sep 7, 3:58 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Sep 7, 5:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Sep 8, 6:46 PM MST	Flash Flood Warning Considerable damage threat	VEF	Mohave	3 hr

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.