Weather alerts in Pima County, Arizona, 2010

211 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Pima County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 211
Warnings: 101
Watches: 7
Advisories: 83
Busiest month: July73 alerts
Busiest day: July 31, 201014 alerts

Over time

By month

Warning verification

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

Pima County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	47	19	60%	47	74%	24 min
Flash flood warnings	39	14	64%	25	92%	54 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tucson, AZ: severe thunderstorm warnings	97	28	71%	64	75%	23 min
NWS Tucson, AZ: flash flood warnings	65	27	58%	49	84%	1134 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
Jan 21, 11:04 AM MST	Areal Flood Advisory	TWC	6 hr
Jan 21, 1:28 PM MST	Areal Flood Advisory	TWC	6 hr
Jan 21, 4:12 PM MST	Tornado Watch	SPC	9 hr
Jan 21, 6:27 PM MST	Mesoscale Discussion	SPC	93 min
Jan 21, 7:18 PM MST	Areal Flood Advisory	TWC	3 hr
Jan 21, 7:27 PM MST	Severe Thunderstorm Warning	TWC	63 min
Jan 21, 8:31 PM MST	Severe Thunderstorm Warning	TWC	59 min
Jan 21, 9:21 PM MST	Mesoscale Discussion	SPC	84 min
Jan 21, 9:30 PM MST	Severe Thunderstorm Warning	TWC	60 min
Jan 21, 10:33 PM MST	Severe Thunderstorm Warning	TWC	57 min
Jan 21, 11:26 PM MST	Severe Thunderstorm Warning	TWC	49 min
Jan 21, 11:37 PM MST	Areal Flood Warning	TWC	18 hr
Jan 22, 12:04 AM MST	Areal Flood Advisory	TWC	3 hr
Jan 22, 4:36 AM MST	Areal Flood Advisory	TWC	6 hr
Feb 28, 10:03 AM MST	Areal Flood Advisory	TWC	3 hr
Jul 11, 8:40 PM MST	Areal Flood Advisory	TWC	80 min
Jul 14, 12:25 PM MST	Areal Flood Advisory	TWC	80 min
Jul 15, 1:51 PM MST	Special Weather Statement	TWC	39 min
Jul 15, 2:43 PM MST	Special Weather Statement	TWC	47 min
Jul 15, 6:02 PM MST	Severe Thunderstorm Warning	TWC	21 min
Jul 15, 6:16 PM MST	Flash Flood Warning	TWC	61 min
Jul 16, 1:17 PM MST	Severe Thunderstorm Warning	TWC	43 min
Jul 16, 2:58 PM MST	Severe Thunderstorm Warning	TWC	47 min
Jul 17, 3:25 PM MST	Severe Thunderstorm Warning	TWC	35 min
Jul 17, 3:31 PM MST	Areal Flood Advisory	TWC	80 min
Jul 17, 4:08 PM MST	Mesoscale Discussion	SPC	97 min
Jul 17, 4:35 PM MST	Severe Thunderstorm Warning	TWC	55 min
Jul 17, 4:57 PM MST	Areal Flood Advisory	TWC	51 min
Jul 17, 5:22 PM MST	Areal Flood Advisory	TWC	83 min
Jul 17, 5:29 PM MST	Severe Thunderstorm Warning	TWC	46 min
Jul 17, 5:29 PM MST	Severe Thunderstorm Warning	TWC	46 min
Jul 17, 5:46 PM MST	Areal Flood Advisory	TWC	34 min
Jul 17, 6:12 PM MST	Severe Thunderstorm Warning	TWC	63 min
Jul 17, 6:48 PM MST	Areal Flood Advisory	TWC	117 min
Jul 17, 7:14 PM MST	Severe Thunderstorm Warning	TWC	27 min
Jul 17, 8:54 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 18, 6:12 PM MST	Areal Flood Advisory	TWC	31 min
Jul 18, 6:38 PM MST	Flash Flood Warning	TWC	81 min
Jul 19, 4:33 PM MST	Flash Flood Warning	TWC	81 min
Jul 19, 11:28 PM MST	Areal Flood Advisory	TWC	27 min
Jul 19, 11:51 PM MST	Flash Flood Warning	TWC	84 min
Jul 21, 3:22 PM MST	Areal Flood Advisory	TWC	113 min
Jul 21, 3:45 PM MST	Flash Flood Warning	TWC	2 hr
Jul 21, 4:41 PM MST	Flash Flood Warning	TWC	109 min
Jul 21, 6:58 PM MST	Areal Flood Advisory	TWC	78 min
Jul 22, 1:47 PM MST	Flash Flood Warning	TWC	118 min
Jul 22, 1:58 PM MST	Areal Flood Advisory	TWC	116 min
Jul 22, 3:52 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 22, 4:17 PM MST	Flash Flood Warning	TWC	118 min
Jul 22, 4:17 PM MST	Severe Thunderstorm Warning	TWC	28 min
Jul 23, 11:18 AM MST	Areal Flood Advisory	TWC	2 hr
Jul 23, 1:55 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 23, 4:29 PM MST	Flash Flood Warning	TWC	61 min
Jul 23, 4:50 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 24, 6:20 PM MST	Severe Thunderstorm Warning	TWC	40 min
Jul 24, 6:26 PM MST	Areal Flood Advisory	TWC	105 min
Jul 26, 3:38 PM MST	Areal Flood Advisory	TWC	84 min
Jul 27, 1:22 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 27, 2:05 PM MST	Flash Flood Warning	TWC	115 min
Jul 27, 2:57 PM MST	Flash Flood Warning	TWC	3 hr
Jul 28, 2:41 PM MST	Areal Flood Advisory	TWC	109 min
Jul 28, 4:14 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 28, 7:14 PM MST	Areal Flood Advisory	TWC	71 min
Jul 29, 1:14 PM MST	Areal Flood Advisory	TWC	2 hr
Jul 29, 2:18 PM MST	Flash Flood Warning	TWC	117 min
Jul 29, 2:28 PM MST	Areal Flood Advisory	TWC	2 hr
Jul 29, 4:29 PM MST	Areal Flood Advisory	TWC	2 hr
Jul 29, 10:30 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 29, 10:49 PM MST	Flash Flood Warning	TWC	116 min
Jul 29, 11:10 PM MST	Flash Flood Warning	TWC	2 hr
Jul 29, 11:19 PM MST	Severe Thunderstorm Warning	TWC	41 min
Jul 29, 11:31 PM MST	Flash Flood Warning	TWC	119 min
Jul 30, 12:53 AM MST	Areal Flood Advisory	TWC	3 hr
Jul 30, 12:55 AM MST	Flash Flood Warning	TWC	110 min
Jul 30, 6:52 PM MST	Areal Flood Advisory	TWC	113 min
Jul 30, 8:09 PM MST	Flash Flood Warning	TWC	3 hr
Jul 30, 8:45 PM MST	Areal Flood Advisory	TWC	3 hr
Jul 30, 9:48 PM MST	Areal Flood Warning	TWC	6 hr
Jul 30, 10:01 PM MST	Flash Flood Warning	TWC	3 hr
Jul 30, 11:52 PM MST	Areal Flood Advisory	TWC	83 min
Jul 31, 12:24 AM MST	Areal Flood Warning	TWC	5 hr
Jul 31, 12:56 AM MST	Areal Flood Advisory	TWC	6 hr
Jul 31, 4:20 AM MST	River Flood Warning	TWC	4 hr
Jul 31, 4:57 AM MST	Areal Flood Advisory	TWC	3 hr
Jul 31, 7:53 AM MST	Areal Flood Advisory	TWC	112 min
Jul 31, 8:42 AM MST	River Flood Warning	TWC	6 hr
Jul 31, 12:53 PM MST	Flash Flood Warning	TWC	112 min
Jul 31, 2:31 PM MST	Areal Flood Advisory	TWC	119 min
Jul 31, 11:14 PM MST	Areal Flood Warning	TWC	6 hr
Aug 1, 5:41 AM MST	Areal Flood Warning	TWC	12 hr
Aug 2, 5:46 PM MST	Areal Flood Advisory	TWC	49 min
Aug 5, 6:19 PM MST	Severe Thunderstorm Warning	TWC	26 min
Aug 6, 3:21 PM MST	Special Weather Statement	TWC	39 min
Aug 6, 3:34 PM MST	Severe Thunderstorm Warning	TWC	41 min
Aug 7, 3:23 PM MST	Mesoscale Discussion	SPC	2 hr
Aug 7, 8:35 PM MST	Areal Flood Advisory	TWC	115 min
Aug 7, 9:27 PM MST	Areal Flood Advisory	TWC	2 hr
Aug 15, 3:54 PM MST	Mesoscale Discussion	SPC	96 min
Aug 15, 3:55 PM MST	Severe Thunderstorm Warning	TWC	35 min
Aug 15, 4:19 PM MST	Areal Flood Advisory	TWC	116 min
Aug 15, 4:26 PM MST	Severe Thunderstorm Warning	TWC	37 min
Aug 15, 5:00 PM MST	Flash Flood Warning	TWC	61 min
Aug 15, 5:30 PM MST	Areal Flood Advisory	TWC	29 min
Aug 15, 5:42 PM MST	Severe Thunderstorm Warning	TWC	38 min
Aug 15, 5:54 PM MST	Flash Flood Warning	TWC	3 hr
Aug 15, 7:28 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 15, 7:44 PM MST	Severe Thunderstorm Warning	TWC	46 min
Aug 15, 8:15 PM MST	Areal Flood Advisory	TWC	2 hr
Aug 15, 8:42 PM MST	Flash Flood Warning	TWC	3 hr
Aug 15, 10:44 PM MST	Areal Flood Advisory	TWC	109 min
Aug 15, 11:00 PM MST	Areal Flood Advisory	TWC	92 min
Aug 17, 12:50 PM MST	Flash Flood Warning	TWC	115 min
Aug 17, 1:09 PM MST	Severe Thunderstorm Warning	TWC	66 min
Aug 17, 1:19 PM MST	Flash Flood Warning	TWC	87 min
Aug 17, 2:35 PM MST	Severe Thunderstorm Warning	TWC	25 min
Aug 17, 2:43 PM MST	Flash Flood Warning	TWC	2 hr
Aug 17, 3:09 PM MST	Mesoscale Discussion	SPC	96 min
Aug 17, 6:34 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 20, 6:21 PM MST	Areal Flood Advisory	TWC	56 min
Aug 21, 5:16 PM MST	Areal Flood Advisory	TWC	119 min
Aug 21, 5:51 PM MST	Mesoscale Discussion	SPC	54 min
Aug 21, 8:16 PM MST	Areal Flood Advisory	TWC	119 min
Aug 21, 9:46 PM MST	Areal Flood Advisory	TWC	74 min
Aug 21, 10:05 PM MST	Flash Flood Warning	TWC	115 min
Aug 23, 1:42 PM MST	Flash Flood Warning	TWC	42 min
Aug 23, 2:46 PM MST	Special Weather Statement	TWC	44 min
Aug 23, 3:10 PM MST	Areal Flood Advisory	TWC	2 hr
Aug 23, 3:34 PM MST	Severe Thunderstorm Warning	TWC	41 min
Aug 23, 4:40 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 24, 12:22 PM MST	Mesoscale Discussion	SPC	83 min
Aug 24, 2:04 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 24, 2:48 PM MST	Severe Thunderstorm Warning	TWC	42 min
Aug 24, 3:10 PM MST	Flash Flood Warning	TWC	2 hr
Aug 24, 3:30 PM MST	Severe Thunderstorm Warning	TWC	45 min
Aug 24, 3:32 PM MST	Severe Thunderstorm Warning	TWC	58 min
Aug 24, 3:42 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 24, 5:06 PM MST	Flash Flood Warning	TWC	3 hr
Aug 24, 6:12 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 24, 9:02 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 26, 9:33 AM MST	Areal Flood Advisory	TWC	87 min
Aug 26, 11:04 AM MST	Areal Flood Advisory	TWC	86 min
Aug 27, 12:09 PM MST	Flash Flood Warning	TWC	52 min
Aug 27, 12:34 PM MST	Areal Flood Advisory	TWC	2 hr
Aug 27, 1:54 PM MST	Special Weather Statement	TWC	36 min
Aug 27, 2:07 PM MST	Flash Flood Warning	TWC	83 min
Aug 28, 2:11 PM MST	Severe Thunderstorm Warning	TWC	34 min
Aug 28, 2:13 PM MST	Flash Flood Warning	TWC	62 min
Aug 28, 2:37 PM MST	Severe Thunderstorm Warning	TWC	38 min
Aug 28, 3:10 PM MST	Flash Flood Warning	TWC	65 min
Aug 28, 3:50 PM MST	Flash Flood Warning	TWC	115 min
Aug 28, 4:13 PM MST	Flash Flood Warning	TWC	92 min
Aug 28, 4:45 PM MST	Severe Thunderstorm Warning	TWC	30 min
Aug 28, 4:57 PM MST	Severe Thunderstorm Warning	TWC	28 min
Aug 28, 5:40 PM MST	Areal Flood Advisory	TWC	110 min
Aug 28, 6:35 PM MST	Severe Thunderstorm Warning	TWC	40 min
Aug 28, 6:46 PM MST	Flash Flood Warning	TWC	119 min
Aug 28, 6:50 PM MST	Severe Thunderstorm Warning	TWC	40 min
Aug 28, 7:15 PM MST	Severe Thunderstorm Warning	TWC	45 min
Aug 29, 12:32 PM MST	Severe Thunderstorm Warning	TWC	43 min
Aug 29, 12:48 PM MST	Severe Thunderstorm Watch	SPC	6 hr
Sep 3, 2:59 PM MST	Areal Flood Advisory	TWC	2 hr
Sep 3, 3:11 PM MST	Severe Thunderstorm Warning	TWC	49 min
Sep 3, 3:13 PM MST	Flash Flood Warning	TWC	62 min
Sep 3, 3:52 PM MST	Severe Thunderstorm Warning	TWC	53 min
Sep 3, 3:55 PM MST	Flash Flood Warning	TWC	2 hr
Sep 7, 2:19 PM MST	Areal Flood Advisory	TWC	116 min
Sep 7, 4:26 PM MST	Areal Flood Advisory	TWC	109 min
Sep 21, 1:26 PM MST	Special Weather Statement	TWC	49 min
Sep 21, 4:11 PM MST	Areal Flood Advisory	TWC	78 min
Sep 22, 12:04 PM MST	Areal Flood Advisory	TWC	3 hr
Sep 22, 12:16 PM MST	Flash Flood Warning	TWC	95 min
Oct 2, 2:57 PM MST	Severe Thunderstorm Warning	TWC	30 min
Oct 2, 3:13 PM MST	Areal Flood Advisory	TWC	108 min
Oct 2, 3:44 PM MST	Severe Thunderstorm Warning	TWC	61 min
Oct 2, 5:07 PM MST	Areal Flood Advisory	TWC	113 min
Oct 2, 9:03 PM MST	Areal Flood Advisory	TWC	117 min
Oct 5, 9:44 AM MST	Severe Thunderstorm Warning	TWC	46 min
Oct 5, 10:44 AM MST	Mesoscale Discussion	SPC	3 hr
Oct 5, 11:29 AM MST	Areal Flood Advisory	TWC	2 hr
Oct 5, 11:39 AM MST	Severe Thunderstorm Warning	TWC	30 min
Oct 5, 11:52 AM MST	Severe Thunderstorm Watch	SPC	7 hr
Oct 5, 12:27 PM MST	Special Weather Statement	TWC	33 min
Oct 5, 2:54 PM MST	Special Weather Statement	TWC	36 min
Oct 5, 3:16 PM MST	Mesoscale Discussion	SPC	59 min
Oct 5, 3:42 PM MST	Special Weather Statement	TWC	33 min
Oct 5, 3:51 PM MST	Severe Thunderstorm Warning	TWC	24 min
Oct 5, 6:06 PM MST	Mesoscale Discussion	SPC	54 min
Oct 5, 6:27 PM MST	Severe Thunderstorm Warning	TWC	33 min
Oct 5, 6:46 PM MST	Areal Flood Advisory	TWC	60 min
Oct 5, 6:55 PM MST	Severe Thunderstorm Warning	TWC	35 min
Oct 15, 3:09 PM MST	Severe Thunderstorm Warning	TWC	51 min
Nov 9, 1:20 PM MST	Freeze Warning	TWC	20 hr
Nov 24, 10:49 AM MST	Freeze Watch	TWC	16 hr
Nov 24, 10:49 AM MST	Hard Freeze Watch	TWC	16 hr
Nov 25, 3:00 AM MST	Freeze Warning	TWC	30 hr
Nov 25, 3:00 AM MST	Hard Freeze Warning	TWC	30 hr
Nov 28, 3:01 AM MST	Freeze Watch	TWC	24 hr
Nov 28, 3:01 AM MST	Wind Advisory	TWC	15 hr
Nov 28, 4:41 PM MST	Winter Weather Advisory	TWC	6 hr
Nov 29, 3:14 AM MST	Freeze Warning	TWC	30 hr
Nov 29, 3:14 AM MST	Hard Freeze Warning	TWC	30 hr
Dec 15, 1:24 PM MST	Winter Weather Advisory	TWC	35 hr
Dec 17, 4:10 AM MST	Dense Fog Advisory	TWC	6 hr
Dec 21, 12:32 PM MST	Winter Weather Advisory	TWC	47 hr
Dec 23, 4:31 AM MST	Areal Flood Advisory	TWC	3 hr
Dec 28, 4:00 AM MST	Winter Storm Watch	TWC	30 hr
Dec 28, 2:11 PM MST	Blizzard Warning	TWC	55 hr
Dec 28, 2:15 PM MST	Wind Advisory	TWC	24 hr
Dec 29, 9:53 AM MST	Winter Storm Warning	TWC	35 hr
Dec 29, 10:40 AM MST	Hard Freeze Warning	TWC	46 hr
Dec 30, 7:37 AM MST	Wind Advisory	TWC	5 hr

By product

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

Product	Alerts
Severe storms
Severe Thunderstorm Warning	47
Severe Thunderstorm Watch	2
Tornado Watch	1
Mesoscale Discussion	11
Special Weather Statement	9
Flooding
Areal Flood Warning	5
Flash Flood Warning	39
River Flood Warning	2
Areal Flood Advisory	76
Winter
Blizzard Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	3
Cold
Freeze Warning	3
Hard Freeze Warning	3
Freeze Watch	2
Hard Freeze Watch	1
Wind and dust
Wind Advisory	3
Fog and smoke
Dense Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.