Alert archive / Arizona / Coconino County

Weather alerts in Coconino County, Arizona, 2017

144 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Coconino County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
144
Warnings
57
Watches
17
Advisories
58
Busiest month
July42 alerts
Busiest day
July 18, 201711 alerts

Over time

By month

Warning verification

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

Coconino County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings80100%30%
Flash flood warnings28871%1182%134 min

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Flagstaff, AZ: severe thunderstorm warnings48785%2330%13 min
NWS Flagstaff, AZ: flash flood warnings913759%6776%90 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.

IssuedProductOfficeLasted
Jan 1, 3:22 AM MSTWinter Weather AdvisoryFGZ9 hr
Jan 1, 2:41 PM MSTWind AdvisoryFGZ27 hr
Jan 4, 7:01 PM MSTWind AdvisoryFGZ10 hr
Jan 5, 12:35 PM MSTWind AdvisoryFGZ18 hr
Jan 5, 12:57 PM MSTWinter Weather AdvisoryFGZ18 hr
Jan 9, 3:43 AM MSTWind AdvisoryFGZ16 hr
Jan 10, 2:30 PM MSTWind AdvisoryFGZ18 hr
Jan 18, 4:12 AM MSTWinter Storm WatchFGZ10 hr
Jan 18, 2:41 PM MSTWinter Storm WarningFGZ3 days
Jan 21, 3:00 PM MSTWinter Storm WatchFGZ13 hr
Jan 22, 3:50 AM MSTWinter Storm WarningFGZ49 hr
Jan 22, 3:50 AM MSTWinter Weather AdvisoryFGZ49 hr
Jan 23, 3:37 AM MSTWind AdvisoryFGZ13 hr
Feb 17, 12:40 PM MSTFlash Flood WatchFGZ39 hr
Feb 17, 2:47 PM MSTWinter Weather AdvisoryFGZ48 hr
Feb 18, 3:48 AM MSTWind AdvisoryFGZ13 hr
Feb 22, 3:46 AM MSTWind AdvisoryFGZ14 hr
Feb 26, 2:39 AM MSTWinter Storm WatchFGZ12 hr
Feb 26, 2:13 PM MSTWinter Storm WarningFGZ48 hr
Feb 26, 2:13 PM MSTWinter Weather AdvisoryFGZ48 hr
Feb 27, 9:52 AM MSTWind AdvisoryFGZ9 hr
Feb 28, 5:20 AM MSTAreal Flood AdvisoryFGZ12 hr
Mar 4, 3:46 AM MSTWind AdvisoryFGZ55 hr
Mar 23, 12:51 AM MSTWinter Weather AdvisoryFGZ6 hr
Mar 29, 2:04 PM MSTHigh Wind WarningFGZ30 hr
Mar 29, 2:04 PM MSTWind AdvisoryFGZ39 hr
Mar 30, 2:55 PM MSTWinter Weather AdvisoryFGZ38 hr
Mar 30, 8:10 PM MSTSpecial Weather StatementFGZ65 min
Apr 2, 2:44 PM MSTWind AdvisoryFGZ29 hr
Apr 3, 3:58 PM MSTSpecial Weather StatementFGZ47 min
Apr 3, 5:03 PM MSTSpecial Weather StatementFGZ42 min
Apr 7, 3:07 AM MSTFire Weather WatchFGZ10 hr
Apr 7, 1:35 PM MSTRed Flag WarningFGZ29 hr
Apr 7, 1:40 PM MSTWind AdvisoryFGZ30 hr
Apr 21, 4:22 AM MSTFire Weather WatchFGZ34 hr
Apr 22, 2:37 PM MSTFire Weather WatchFGZ24 hr
Apr 22, 2:37 PM MSTRed Flag WarningFGZ28 hr
Apr 23, 4:04 AM MSTWind AdvisoryFGZ15 hr
Apr 23, 2:18 PM MSTWind AdvisoryFGZ29 hr
Apr 23, 2:40 PM MSTRed Flag WarningFGZ29 hr
Apr 24, 9:19 PM MSTWind AdvisoryFGZ22 hr
Apr 27, 3:32 AM MSTWind AdvisoryFGZ15 hr
May 4, 2:02 PM MSTFire Weather WatchFGZ25 hr
May 5, 2:29 PM MSTWind AdvisoryFGZ29 hr
May 5, 2:43 PM MSTRed Flag WarningFGZ28 hr
May 7, 3:20 AM MSTWind AdvisoryFGZ12 hr
May 11, 3:25 PM MSTWind AdvisoryFGZ53 hr
May 14, 2:30 PM MSTWind AdvisoryFGZ29 hr
May 15, 4:04 AM MSTRed Flag WarningFGZ15 hr
May 16, 1:40 PM MSTWind AdvisoryFGZ30 hr
May 23, 3:51 AM MSTFire Weather WatchFGZ24 hr
May 24, 3:44 AM MSTRed Flag WarningFGZ40 hr
May 24, 4:21 AM MSTWind AdvisoryFGZ40 hr
May 25, 3:15 PM MSTRed Flag WarningFGZ29 hr
Jun 8, 9:12 AM MSTRed Flag WarningFGZ34 hr
Jun 8, 2:41 PM MSTFire Weather WatchFGZ24 hr
Jun 9, 2:36 PM MSTWind AdvisoryFGZ52 hr
Jun 9, 3:00 PM MSTRed Flag WarningFGZ28 hr
Jun 9, 3:00 PM MSTRed Flag WarningFGZ3 days
Jun 10, 3:23 AM MSTWind AdvisoryFGZ16 hr
Jun 11, 2:14 PM MSTWind AdvisoryFGZ28 hr
Jun 13, 3:08 AM MSTExcessive Heat WatchFGZ36 hr
Jun 14, 2:52 PM MSTExcessive Heat WarningFGZ11 days
Jun 14, 2:52 PM MSTHeat AdvisoryFGZ8 days
Jun 26, 3:01 PM MSTRed Flag WarningFGZ29 hr
Jun 27, 3:13 PM MSTRed Flag WarningFGZ29 hr
Jul 5, 2:05 AM MSTExcessive Heat WarningFGZ66 hr
Jul 11, 4:16 PM MSTFlash Flood WarningFGZ3 hr
Jul 16, 3:31 AM MSTFlash Flood WatchFGZ42 hr
Jul 16, 6:44 PM MSTAreal Flood AdvisoryFGZ2 hr
Jul 18, 3:32 AM MSTFlash Flood WatchFGZ40 hr
Jul 18, 11:16 AM MSTMesoscale DiscussionSPC2 hr
Jul 18, 12:44 PM MSTSevere Thunderstorm WarningFGZ31 min
Jul 18, 1:19 PM MSTFlash Flood WarningFGZ3 hr
Jul 18, 2:17 PM MSTSevere Thunderstorm WarningFGZ28 min
Jul 18, 2:21 PM MSTAreal Flood AdvisoryFGZ114 min
Jul 18, 2:58 PM MSTFlash Flood WarningFGZ3 hr
Jul 18, 3:05 PM MSTSevere Thunderstorm WarningFGZ3 min
Jul 18, 3:13 PM MSTFlash Flood WarningFGZ3 hr
Jul 18, 3:37 PM MSTFlash Flood WarningFGZ3 hr
Jul 18, 4:24 PM MSTFlash Flood WarningFGZ3 hr
Jul 18, 8:32 PM MSTFlash Flood WarningFGZ118 min
Jul 18, 11:24 PM MSTFlash Flood WarningFGZ3 hr
Jul 19, 1:28 AM MSTAreal Flood AdvisoryFGZ3 hr
Jul 19, 12:05 PM MSTAreal Flood AdvisoryFGZ3 hr
Jul 19, 12:05 PM MSTMesoscale DiscussionSPC2 hr
Jul 19, 5:13 PM MSTSevere Thunderstorm WarningFGZ32 min
Jul 19, 5:54 PM MSTFlash Flood WarningFGZ3 hr
Jul 20, 3:45 PM MSTFlash Flood WarningFGZ3 hr
Jul 21, 11:06 AM MSTFlash Flood WarningFGZ3 hr
Jul 23, 9:02 AM MSTFlash Flood WatchFGZ15 hr
Jul 23, 12:05 PM MSTSpecial Weather StatementFGZ40 min
Jul 23, 12:20 PM MSTAreal Flood AdvisoryFGZ4 hr
Jul 23, 12:32 PM MSTFlash Flood WarningFGZ3 hr
Jul 23, 2:01 PM MSTAreal Flood AdvisoryFGZ3 hr
Jul 23, 2:31 PM MSTFlash Flood WarningFGZ3 hr
Jul 23, 2:50 PM MSTFlash Flood WarningFGZ3 hr
Jul 23, 2:56 PM MSTSevere Thunderstorm WarningFGZ49 min
Jul 23, 3:26 PM MSTFlash Flood WarningFGZ3 hr
Jul 24, 3:08 AM MSTFlash Flood WatchFGZ21 hr
Jul 24, 1:03 PM MSTFlash Flood WarningFGZ3 hr
Jul 25, 12:42 PM MSTFlash Flood WarningFGZ7 hr
Jul 25, 7:41 PM MSTFlash Flood WarningFGZ3 hr
Jul 28, 1:49 PM MSTFlash Flood WarningFGZ116 min
Jul 29, 12:48 PM MSTAreal Flood AdvisoryFGZ3 hr
Jul 29, 1:28 PM MSTSpecial Weather StatementFGZ32 min
Jul 29, 6:02 PM MSTAreal Flood AdvisoryFGZ9 hr
Jul 30, 2:38 PM MSTFlash Flood WarningFGZ3 hr
Aug 2, 3:37 PM MSTFlash Flood WarningFGZ113 min
Aug 3, 12:40 PM MSTSpecial Weather StatementFGZ35 min
Aug 3, 1:19 PM MSTSpecial Weather StatementFGZ26 min
Aug 3, 7:44 PM MSTFlash Flood WarningFGZ3 hr
Aug 4, 2:46 PM MSTAreal Flood AdvisoryFGZ119 min
Aug 4, 4:21 PM MSTAreal Flood AdvisoryFGZ114 min
Aug 4, 5:19 PM MSTAreal Flood AdvisoryFGZ116 min
Aug 5, 12:38 AM MSTAreal Flood AdvisoryFGZ3 hr
Aug 5, 10:40 PM MSTFlash Flood WarningFGZ6 hr
Aug 12, 12:09 PM MSTAreal Flood AdvisoryFGZ3 hr
Aug 12, 1:01 PM MSTFlash Flood WarningFGZ3 hr
Aug 12, 1:17 PM MSTFlash Flood WarningFGZ3 hr
Aug 12, 4:38 PM MSTSevere Thunderstorm WarningFGZ26 min
Aug 13, 1:40 PM MSTFlash Flood WarningFGZ3 hr
Aug 13, 1:49 PM MSTAreal Flood AdvisoryFGZ3 hr
Aug 13, 2:44 PM MSTFlash Flood WarningFGZ6 hr
Aug 13, 6:18 PM MSTSevere Thunderstorm WarningFGZ18 min
Aug 13, 6:33 PM MSTAreal Flood AdvisoryFGZ117 min
Aug 20, 2:59 PM MSTAreal Flood AdvisoryFGZ3 hr
Aug 23, 7:41 PM MSTSpecial Weather StatementFGZ34 min
Aug 23, 10:04 PM MSTAreal Flood AdvisoryFGZ116 min
Sep 7, 2:51 PM MSTFlash Flood WatchFGZ44 hr
Sep 14, 3:38 AM MSTFlash Flood WatchFGZ14 hr
Sep 14, 11:18 AM MSTSpecial Weather StatementFGZ27 min
Sep 14, 11:53 AM MSTSevere Thunderstorm WarningFGZ20 min
Sep 14, 12:44 PM MSTMesoscale DiscussionSPC3 hr
Sep 14, 6:38 PM MSTFlash Flood WarningFGZ8 hr
Sep 20, 2:17 PM MSTWind AdvisoryFGZ30 hr
Sep 23, 2:34 AM MSTFreeze WarningFGZ29 hr
Oct 1, 2:56 PM MSTWind AdvisoryFGZ27 hr
Oct 19, 3:22 PM MSTWind AdvisoryFGZ28 hr
Nov 16, 3:31 AM MSTWind AdvisoryFGZ38 hr
Nov 26, 2:50 AM MSTWind AdvisoryFGZ39 hr
Nov 26, 1:34 PM MSTHigh Wind WarningFGZ28 hr
Nov 27, 3:10 AM MSTRed Flag WarningFGZ14 hr
Dec 20, 3:44 AM MSTWind AdvisoryFGZ25 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20162018

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.