Alert archive / Arizona / Coconino County / Flash Flood Warnings

Flash Flood Warnings in Coconino County, Arizona, 2022

167 flash flood warnings in 2022. An alert counts here when it covered this county. The archive of flash flood warnings reaches back to 1986.

Coconino County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Flash Flood Warnings: 167
Busiest month: August76 flash flood warnings
Busiest day: September 10, 202210 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.

55 of 167 flash flood warnings covering Coconino County in 2022 had a flash flood report inside them; 67 of 108 flash flood reports fell inside a warning, on average 78 minutes after it went out.

Coconino County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Flash flood warnings	167	55	67%	108	62%	78 min

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Flagstaff, AZ: flash flood warnings	341	101	70%	221	66%	84 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	Lasted
Jun 25, 12:06 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jun 25, 3:36 PM MST	Flash Flood Warning Considerable damage threat	FGZ	114 min
Jun 26, 12:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Jun 26, 12:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jun 26, 3:49 PM MST	Flash Flood Warning Considerable damage threat	FGZ	10 hr
Jun 29, 1:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	2 hr
Jun 29, 2:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jun 29, 3:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 1, 1:16 PM MST	Flash Flood Warning Considerable damage threat	FGZ	119 min
Jul 5, 3:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Jul 5, 5:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	2 hr
Jul 5, 6:26 PM MST	Flash Flood Warning Considerable damage threat	FGZ	114 min
Jul 5, 6:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	95 min
Jul 14, 10:32 AM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Jul 14, 11:03 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 15, 5:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 15, 5:42 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 17, 2:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 18, 7:14 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 19, 5:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 19, 6:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Jul 23, 2:28 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Jul 23, 3:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Jul 23, 5:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Jul 24, 3:00 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 24, 3:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	2 hr
Jul 24, 4:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 24, 11:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Jul 25, 3:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 25, 5:11 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 25, 6:59 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 26, 10:50 AM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Jul 26, 4:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	86 min
Jul 26, 4:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 26, 5:28 PM MST	Flash Flood Warning Considerable damage threat	FGZ	107 min
Jul 27, 5:25 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 27, 11:55 AM MST	Flash Flood Warning Considerable damage threat	FGZ	50 min
Jul 27, 12:03 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 27, 1:36 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 27, 2:10 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 27, 3:01 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 27, 3:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 12:23 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 2:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 2:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 3:02 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 3:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 5:25 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 5:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 6:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 28, 10:39 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 11:23 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 1:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 2:17 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 2:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 2:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 5:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 6:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 29, 10:24 PM MST	Flash Flood Warning Considerable damage threat	FGZ	7 hr
Jul 30, 11:37 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 30, 12:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 30, 12:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 30, 3:15 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 30, 5:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 30, 5:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 10:54 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 11:34 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 1:00 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 5:35 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 6:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Jul 31, 6:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 4, 4:16 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 11:53 AM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 7, 12:10 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 12:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 12:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 3:54 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 7, 4:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 4:35 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 7, 5:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 8, 3:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 8, 7:29 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 9, 5:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Aug 9, 8:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 10, 3:10 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 10, 7:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Aug 11, 2:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Aug 11, 2:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 11, 4:44 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 11, 5:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Aug 11, 5:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 11, 6:39 PM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Aug 11, 6:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 11:24 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 1:10 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 1:58 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 2:11 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 4:36 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 12, 6:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 13, 11:51 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 13, 4:35 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 10:41 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 12:52 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 1:11 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 2:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 4:14 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 5:06 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 14, 6:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 15, 8:00 AM MST	Flash Flood Warning	FGZ	4 hr
Aug 15, 2:17 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 15, 3:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 15, 3:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 15, 4:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 16, 7:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 17, 11:52 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 17, 1:15 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Aug 18, 11:44 AM MST	Flash Flood Warning	FGZ	3 hr
Aug 18, 1:29 PM MST	Flash Flood Warning	FGZ	118 min
Aug 18, 1:53 PM MST	Flash Flood Warning	FGZ	3 hr
Aug 18, 2:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 18, 4:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 18, 4:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 18, 4:31 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 18, 4:51 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 18, 8:07 PM MST	Flash Flood Warning Considerable damage threat	FGZ	8 hr
Aug 20, 2:57 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 20, 4:12 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 21, 2:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Aug 21, 2:56 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 21, 4:18 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 21, 4:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 21, 4:39 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Aug 21, 4:46 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Aug 21, 4:52 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 11:27 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 11:56 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 12:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 12:45 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 1:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 2:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 24, 4:02 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 25, 3:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 26, 3:53 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Aug 26, 4:38 PM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Sep 9, 2:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 9, 3:43 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 10, 9:35 AM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 10, 9:56 AM MST	Flash Flood Warning Considerable damage threat	FGZ	6 hr
Sep 10, 11:55 AM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Sep 10, 1:52 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Sep 10, 2:26 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Sep 10, 3:22 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 10, 3:29 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 10, 4:14 PM MST	Flash Flood Warning Considerable damage threat	FGZ	110 min
Sep 10, 4:18 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 10, 4:23 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 11, 2:25 PM MST	Flash Flood Warning Considerable damage threat	FGZ	2 hr
Sep 12, 4:09 PM MST	Flash Flood Warning Considerable damage threat	FGZ	5 hr
Sep 12, 5:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 13, 2:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 13, 2:50 PM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Sep 14, 4:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	3 hr
Sep 21, 1:55 PM MST	Flash Flood Warning Considerable damage threat	FGZ	16 hr
Oct 1, 6:34 PM MST	Flash Flood Warning Considerable damage threat	FGZ	8 hr
Oct 3, 10:54 AM MST	Flash Flood Warning Considerable damage threat	FGZ	4 hr
Oct 3, 12:03 PM MST	Flash Flood Warning	FGZ	7 hr
Oct 3, 8:18 PM MST	Flash Flood Warning Considerable damage threat	FGZ	8 hr

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast 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.