Weather alerts in Valley County, Montana, 2011

352 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Valley County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 352
Warnings: 141
Watches: 40
Advisories: 120
Busiest month: June75 alerts
Busiest day: July 22, 201114 alerts

Over time

By month

Warning verification

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

2 of 4 tornado warnings covering Valley County in 2011 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 21 minutes after it went out.

Valley County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	2	50%	1	100%	21 min
Severe thunderstorm warnings	62	25	60%	49	65%	25 min
Flash flood warnings	13	7	46%	14	79%	101 min

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Glasgow, MT: tornado warnings	12	3	75%	2	100%	22 min
NWS Glasgow, MT: severe thunderstorm warnings	173	81	53%	170	78%	27 min
NWS Glasgow, MT: flash flood warnings	29	10	66%	25	72%	93 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 1, 2:51 PM MST	Wind Chill Advisory	GGW	13 hr
Jan 2, 11:13 AM MST	Winter Weather Advisory	GGW	17 hr
Jan 6, 3:05 PM MST	Winter Storm Watch	GGW	24 hr
Jan 7, 3:20 PM MST	Winter Weather Advisory	GGW	43 hr
Jan 7, 9:17 PM MST	Winter Storm Warning	GGW	30 hr
Jan 9, 3:00 PM MST	Wind Chill Advisory	GGW	19 hr
Jan 10, 3:13 PM MST	Wind Chill Advisory	GGW	18 hr
Jan 11, 2:56 PM MST	Wind Chill Advisory	GGW	29 hr
Jan 14, 3:49 AM MST	Winter Weather Advisory	GGW	24 hr
Jan 16, 3:17 AM MST	Freezing Rain Advisory	GGW	23 hr
Jan 17, 3:10 AM MST	Wind Chill Advisory	GGW	8 hr
Jan 17, 7:24 PM MST	Winter Weather Advisory	GGW	17 hr
Jan 19, 3:34 AM MST	Dense Fog Advisory	GGW	7 hr
Jan 19, 3:04 PM MST	Wind Chill Advisory	GGW	12 hr
Jan 20, 3:07 PM MST	Winter Storm Watch	GGW	13 hr
Jan 21, 3:56 AM MST	Winter Weather Advisory	GGW	32 hr
Jan 22, 7:40 AM MST	Blizzard Warning	GGW	4 hr
Jan 22, 2:56 PM MST	Winter Weather Advisory	GGW	42 hr
Jan 25, 10:45 PM MST	Dense Fog Advisory	GGW	11 hr
Jan 29, 12:33 AM MST	Winter Weather Advisory	GGW	6 hr
Jan 29, 9:26 AM MST	Winter Weather Advisory	GGW	36 hr
Jan 30, 2:32 PM MST	Wind Chill Advisory	GGW	44 hr
Jan 31, 6:23 AM MST	Wind Chill Warning	GGW	5 hr
Jan 31, 6:23 AM MST	Wind Chill Advisory	GGW	9 hr
Jan 31, 2:53 PM MST	Wind Chill Warning	GGW	20 hr
Feb 1, 11:11 AM MST	Wind Chill Advisory	GGW	24 hr
Feb 1, 8:50 PM MST	Wind Chill Warning	GGW	14 hr
Feb 4, 2:30 PM MST	Winter Weather Advisory	GGW	29 hr
Feb 6, 3:21 PM MST	Wind Chill Advisory	GGW	43 hr
Feb 7, 2:57 PM MST	Wind Chill Warning	GGW	19 hr
Feb 8, 2:28 PM MST	Wind Chill Advisory	GGW	20 hr
Feb 10, 3:26 AM MST	Winter Weather Advisory	GGW	31 hr
Feb 11, 2:56 PM MST	High Wind Warning	GGW	47 hr
Feb 12, 3:00 PM MST	High Wind Watch	GGW	12 hr
Feb 15, 2:22 PM MST	Winter Storm Watch	GGW	25 hr
Feb 16, 3:16 PM MST	Winter Weather Advisory	GGW	23 hr
Feb 17, 5:10 AM MST	Winter Storm Warning	GGW	14 hr
Feb 17, 5:47 PM MST	Wind Chill Advisory	GGW	17 hr
Feb 19, 3:20 AM MST	Wind Chill Watch	GGW	11 hr
Feb 19, 2:30 PM MST	Wind Chill Warning	GGW	14 hr
Feb 19, 2:30 PM MST	Wind Chill Advisory	GGW	43 hr
Feb 19, 2:30 PM MST	Winter Weather Advisory	GGW	31 hr
Feb 22, 2:50 PM MST	Winter Weather Advisory	GGW	13 hr
Feb 23, 3:23 AM MST	Wind Chill Advisory	GGW	57 hr
Feb 25, 2:31 PM MST	Wind Chill Advisory	GGW	22 hr
Feb 26, 3:39 AM MST	Wind Chill Warning	GGW	7 hr
Feb 28, 3:16 AM MST	Wind Chill Advisory	GGW	12 hr
Feb 28, 2:53 PM MST	Winter Weather Advisory	GGW	20 hr
Mar 1, 11:00 AM MST	Wind Chill Advisory	GGW	27 hr
Mar 4, 3:58 PM MST	Wind Chill Advisory	GGW	18 hr
Mar 5, 2:24 PM MST	Winter Weather Advisory	GGW	13 hr
Mar 6, 2:27 PM MST	Wind Chill Advisory	GGW	21 hr
Mar 17, 7:52 PM MDT	Flood Watch	GGW	4 days
Mar 20, 3:44 AM MDT	Winter Storm Watch	GGW	36 hr
Mar 21, 3:50 PM MDT	Blizzard Warning	GGW	18 hr
Mar 22, 10:17 AM MDT	Winter Storm Warning	GGW	28 hr
Mar 23, 11:38 AM MDT	Areal Flood Warning	GGW	9 days
Mar 24, 10:02 AM MDT	River Flood Warning	GGW	41 hr
Mar 24, 5:48 PM MDT	Winter Weather Advisory	GGW	4 days
Apr 1, 3:50 AM MDT	Winter Storm Watch	GGW	24 hr
Apr 1, 9:43 AM MDT	Areal Flood Advisory	GGW	67 hr
Apr 2, 3:26 AM MDT	Winter Storm Warning	GGW	34 hr
Apr 2, 3:26 AM MDT	Winter Weather Advisory	GGW	34 hr
Apr 3, 12:31 PM MDT	Flood Watch	GGW	48 hr
Apr 4, 4:21 AM MDT	Areal Flood Warning	GGW	69 hr
Apr 5, 12:45 PM MDT	Areal Flood Advisory	GGW	25 hr
Apr 5, 1:02 PM MDT	River Flood Warning	GGW	30 days
Apr 5, 1:02 PM MDT	River Flood Warning	GGW	26 days
Apr 6, 9:54 AM MDT	River Flood Warning	GGW	22 days
Apr 6, 1:55 PM MDT	Areal Flood Warning	GGW	11 hr
Apr 7, 1:04 AM MDT	Areal Flood Warning	GGW	7 days
Apr 9, 10:11 PM MDT	River Flood Warning	GGW	11 days
Apr 11, 2:14 PM MDT	Areal Flood Advisory	GGW	5 days
Apr 13, 10:28 PM MDT	Areal Flood Warning	GGW	8 days
Apr 14, 4:12 AM MDT	Winter Weather Advisory	GGW	17 hr
Apr 16, 2:24 PM MDT	Winter Weather Advisory	GGW	24 hr
Apr 21, 1:21 PM MDT	Areal Flood Warning	GGW	72 hr
Apr 24, 1:02 PM MDT	Areal Flood Advisory	GGW	50 hr
Apr 25, 12:18 PM MDT	River Flood Warning	GGW	45 hr
Apr 29, 2:39 PM MDT	Lake Wind Advisory	GGW	29 hr
Apr 30, 10:34 AM MDT	High Wind Warning	GGW	7 hr
May 3, 11:42 AM MDT	Lake Wind Advisory	GGW	15 hr
May 4, 3:43 AM MDT	Lake Wind Advisory	GGW	17 hr
May 5, 2:24 PM MDT	Lake Wind Advisory	GGW	29 hr
May 8, 2:53 PM MDT	Lake Wind Advisory	GGW	53 hr
May 10, 10:59 AM MDT	River Flood Watch	GGW	37 hr
May 10, 10:59 AM MDT	River Flood Watch	GGW	68 hr
May 10, 12:04 PM MDT	Areal Flood Warning	GGW	12 hr
May 11, 12:08 AM MDT	Areal Flood Warning	GGW	12 hr
May 11, 12:08 PM MDT	Areal Flood Advisory	GGW	21 hr
May 12, 8:48 AM MDT	Areal Flood Advisory	GGW	54 hr
May 14, 4:00 AM MDT	High Wind Watch	GGW	24 hr
May 14, 4:00 AM MDT	Lake Wind Advisory	GGW	62 hr
May 17, 9:01 AM MDT	Flood Watch	GGW	3 hr
May 17, 11:53 AM MDT	Areal Flood Warning	GGW	48 hr
May 18, 2:47 PM MDT	Flood Watch	GGW	44 hr
May 19, 8:19 PM MDT	Lake Wind Advisory	GGW	27 hr
May 20, 10:19 AM MDT	Areal Flood Warning	GGW	6 days
May 21, 4:00 AM MDT	Lake Wind Advisory	GGW	17 hr
May 21, 11:45 PM MDT	River Flood Warning	GGW	38 days
May 22, 11:05 AM MDT	River Flood Warning	GGW	36 days
May 23, 2:41 PM MDT	Lake Wind Advisory	GGW	29 hr
May 24, 2:10 AM MDT	River Flood Warning	GGW	32 days
May 24, 9:55 AM MDT	River Flood Warning	GGW	4 days
May 25, 3:30 AM MDT	Lake Wind Advisory	GGW	39 hr
May 27, 2:29 AM MDT	Lake Wind Advisory	GGW	18 hr
May 27, 3:24 AM MDT	Flood Watch	GGW	4 days
May 28, 3:37 AM MDT	Lake Wind Advisory	GGW	16 hr
May 29, 3:04 AM MDT	Lake Wind Advisory	GGW	42 hr
May 30, 2:51 AM MDT	High Wind Watch	GGW	18 hr
May 30, 8:48 PM MDT	Areal Flood Warning	GGW	12 days
May 30, 9:17 PM MDT	Lake Wind Advisory	GGW	17 hr
Jun 1, 3:38 AM MDT	Lake Wind Advisory	GGW	23 hr
Jun 2, 9:34 AM MDT	Lake Wind Advisory	GGW	35 hr
Jun 2, 1:54 PM MDT	Mesoscale Discussion	SPC	66 min
Jun 2, 2:09 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 2, 2:16 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Jun 2, 2:23 PM MDT	Severe Thunderstorm Warning	GGW	52 min
Jun 2, 2:40 PM MDT	Severe Thunderstorm Warning	GGW	49 min
Jun 2, 3:06 PM MDT	Severe Thunderstorm Warning	GGW	39 min
Jun 2, 3:10 PM MDT	Severe Thunderstorm Warning	GGW	65 min
Jun 2, 3:13 PM MDT	Special Weather Statement	GGW	62 min
Jun 2, 3:38 PM MDT	Special Weather Statement	GGW	52 min
Jun 2, 3:50 PM MDT	Severe Thunderstorm Warning	GGW	25 min
Jun 2, 4:08 PM MDT	Severe Thunderstorm Warning	GGW	52 min
Jun 2, 4:49 PM MDT	Flash Flood Warning	GGW	3 hr
Jun 2, 6:56 PM MDT	Special Weather Statement	GGW	49 min
Jun 2, 6:58 PM MDT	Special Weather Statement	GGW	62 min
Jun 2, 7:40 PM MDT	Special Weather Statement	GGW	35 min
Jun 3, 9:13 PM MDT	Flood Watch	GGW	41 hr
Jun 5, 2:16 PM MDT	Areal Flood Warning	GGW	6 days
Jun 6, 3:14 AM MDT	Lake Wind Advisory	GGW	43 hr
Jun 6, 11:45 PM MDT	Special Weather Statement	GGW	60 min
Jun 7, 12:18 AM MDT	Special Weather Statement	GGW	57 min
Jun 7, 12:21 AM MDT	Flash Flood Warning	GGW	4 hr
Jun 7, 1:36 AM MDT	Flash Flood Warning	GGW	3 hr
Jun 7, 4:22 AM MDT	Areal Flood Warning	GGW	64 hr
Jun 7, 9:22 AM MDT	Flash Flood Warning	GGW	3 hr
Jun 7, 9:24 AM MDT	Special Weather Statement	GGW	66 min
Jun 7, 11:51 AM MDT	Flash Flood Warning	GGW	9 hr
Jun 7, 12:14 PM MDT	River Flood Warning	GGW	7 days
Jun 7, 1:03 PM MDT	Flash Flood Warning	GGW	4 hr
Jun 9, 10:02 AM MDT	Lake Wind Advisory	GGW	11 hr
Jun 11, 10:57 AM MDT	Areal Flood Warning	GGW	67 hr
Jun 11, 12:55 PM MDT	Severe Thunderstorm Warning	GGW	55 min
Jun 11, 1:49 PM MDT	Severe Thunderstorm Warning	GGW	41 min
Jun 11, 3:10 PM MDT	Special Weather Statement	GGW	65 min
Jun 11, 3:34 PM MDT	Severe Thunderstorm Warning	GGW	56 min
Jun 11, 4:10 PM MDT	Flash Flood Watch	GGW	5 hr
Jun 11, 4:11 PM MDT	Flash Flood Warning	GGW	86 min
Jun 11, 5:57 PM MDT	Flash Flood Warning	GGW	3 hr
Jun 11, 8:35 PM MDT	Areal Flood Warning	GGW	9 days
Jun 11, 9:02 PM MDT	Areal Flood Warning	GGW	20 hr
Jun 11, 10:08 PM MDT	Flash Flood Warning	GGW	3 hr
Jun 12, 9:44 AM MDT	Flash Flood Watch	GGW	11 hr
Jun 12, 2:17 PM MDT	Special Weather Statement	GGW	58 min
Jun 13, 2:35 PM MDT	Flash Flood Watch	GGW	21 hr
Jun 14, 5:30 AM MDT	Areal Flood Warning	GGW	5 days
Jun 14, 12:00 PM MDT	Lake Wind Advisory	GGW	7 hr
Jun 16, 3:37 AM MDT	Flash Flood Watch	GGW	40 hr
Jun 17, 10:26 AM MDT	Lake Wind Advisory	GGW	10 hr
Jun 17, 1:25 PM MDT	Flash Flood Warning	GGW	3 hr
Jun 17, 5:52 PM MDT	Flash Flood Warning	GGW	6 hr
Jun 17, 11:37 PM MDT	Areal Flood Warning	GGW	6 days
Jun 18, 3:01 PM MDT	Flash Flood Watch	GGW	36 hr
Jun 18, 6:08 PM MDT	Special Weather Statement	GGW	52 min
Jun 19, 7:26 AM MDT	Areal Flood Warning	GGW	12 days
Jun 20, 9:21 PM MDT	Areal Flood Warning	GGW	37 hr
Jun 23, 4:01 AM MDT	Lake Wind Advisory	GGW	20 hr
Jun 23, 8:00 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jun 23, 8:46 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Jun 23, 9:03 PM MDT	Special Weather Statement	GGW	57 min
Jun 23, 9:53 PM MDT	Special Weather Statement	GGW	52 min
Jun 29, 3:46 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 29, 6:16 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Jun 29, 6:17 PM MDT	Mesoscale Discussion	SPC	118 min
Jun 29, 6:32 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Jun 29, 6:54 PM MDT	Tornado Warning	GGW	36 min
Jun 29, 7:03 PM MDT	Tornado Watch	SPC	4 hr
Jun 29, 7:06 PM MDT	Severe Thunderstorm Warning	GGW	39 min
Jun 29, 7:14 PM MDT	Severe Thunderstorm Warning	GGW	35 min
Jun 29, 7:14 PM MDT	Tornado Warning	GGW	44 min
Jun 29, 7:23 PM MDT	Severe Thunderstorm Warning	GGW	67 min
Jun 29, 7:43 PM MDT	Severe Thunderstorm Warning	GGW	53 min
Jun 29, 8:11 PM MDT	Tornado Warning	GGW	23 min
Jun 29, 8:23 PM MDT	Severe Thunderstorm Warning	GGW	52 min
Jun 29, 9:03 PM MDT	Mesoscale Discussion	SPC	57 min
Jul 2, 6:21 PM MDT	Special Weather Statement	GGW	54 min
Jul 2, 6:45 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jul 3, 12:31 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 4:08 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 3, 6:29 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 7:05 PM MDT	Severe Thunderstorm Warning	GGW	55 min
Jul 3, 7:55 PM MDT	Severe Thunderstorm Warning	GGW	65 min
Jul 3, 7:58 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Jul 3, 8:02 PM MDT	Mesoscale Discussion	SPC	58 min
Jul 3, 8:54 PM MDT	Severe Thunderstorm Warning	GGW	66 min
Jul 3, 8:57 PM MDT	Special Weather Statement	GGW	63 min
Jul 3, 9:26 PM MDT	Special Weather Statement	GGW	64 min
Jul 5, 4:46 PM MDT	Special Weather Statement	GGW	59 min
Jul 5, 5:36 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Jul 8, 2:46 AM MDT	Lake Wind Advisory	GGW	13 hr
Jul 8, 8:15 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jul 8, 8:41 PM MDT	Special Weather Statement	GGW	49 min
Jul 8, 9:10 PM MDT	Special Weather Statement	GGW	50 min
Jul 9, 3:10 AM MDT	Lake Wind Advisory	GGW	17 hr
Jul 11, 3:50 AM MDT	Lake Wind Advisory	GGW	53 hr
Jul 13, 10:31 PM MDT	Special Weather Statement	GGW	59 min
Jul 13, 11:17 PM MDT	Severe Thunderstorm Warning	GGW	28 min
Jul 13, 11:38 PM MDT	Severe Thunderstorm Warning	GGW	45 min
Jul 14, 1:56 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 14, 6:26 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jul 14, 6:33 PM MDT	Mesoscale Discussion	SPC	57 min
Jul 14, 7:14 PM MDT	Severe Thunderstorm Warning	GGW	61 min
Jul 14, 8:44 PM MDT	Severe Thunderstorm Warning	GGW	61 min
Jul 15, 7:30 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jul 15, 8:30 PM MDT	Special Weather Statement	GGW	60 min
Jul 16, 4:14 PM MDT	Mesoscale Discussion	SPC	61 min
Jul 16, 5:11 PM MDT	Severe Thunderstorm Warning	GGW	37 min
Jul 16, 7:53 PM MDT	Severe Thunderstorm Warning	GGW	67 min
Jul 16, 8:52 PM MDT	Severe Thunderstorm Warning	GGW	53 min
Jul 18, 9:01 AM MDT	Heat Advisory	GGW	35 hr
Jul 18, 9:40 PM MDT	Special Weather Statement	GGW	65 min
Jul 18, 10:26 PM MDT	Special Weather Statement	GGW	49 min
Jul 19, 3:18 PM MDT	Lake Wind Advisory	GGW	27 hr
Jul 19, 7:03 PM MDT	Special Weather Statement	GGW	57 min
Jul 22, 1:02 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Jul 22, 1:06 PM MDT	Mesoscale Discussion	SPC	24 min
Jul 22, 1:25 PM MDT	Tornado Watch	SPC	8 hr
Jul 22, 1:48 PM MDT	Severe Thunderstorm Warning	GGW	57 min
Jul 22, 2:02 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Jul 22, 2:17 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Jul 22, 2:46 PM MDT	Severe Thunderstorm Warning	GGW	44 min
Jul 22, 3:06 PM MDT	Flash Flood Warning	GGW	2 hr
Jul 22, 3:12 PM MDT	Severe Thunderstorm Warning	GGW	63 min
Jul 22, 3:29 PM MDT	Severe Thunderstorm Warning	GGW	61 min
Jul 22, 4:17 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 22, 5:00 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jul 22, 5:07 PM MDT	Flash Flood Warning	GGW	2 hr
Jul 22, 5:43 PM MDT	Severe Thunderstorm Warning	GGW	21 min
Jul 25, 5:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 25, 5:47 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 25, 7:37 PM MDT	Severe Thunderstorm Warning	GGW	68 min
Jul 25, 8:42 PM MDT	Special Weather Statement	GGW	63 min
Jul 26, 12:14 AM MDT	Special Weather Statement	GGW	61 min
Jul 26, 1:18 AM MDT	Special Weather Statement	GGW	57 min
Jul 26, 1:07 PM MDT	Mesoscale Discussion	SPC	53 min
Jul 26, 1:28 PM MDT	Severe Thunderstorm Warning	GGW	34 min
Jul 26, 1:50 PM MDT	Severe Thunderstorm Warning	GGW	55 min
Jul 26, 2:27 PM MDT	Severe Thunderstorm Warning	GGW	31 min
Jul 26, 2:43 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 26, 4:56 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jul 26, 6:12 PM MDT	Severe Thunderstorm Warning	GGW	48 min
Aug 4, 7:36 PM MDT	Flash Flood Watch	GGW	24 hr
Aug 5, 4:11 AM MDT	Severe Thunderstorm Warning	GGW	64 min
Aug 5, 6:09 AM MDT	Lake Wind Advisory	GGW	8 hr
Aug 8, 11:32 AM MDT	Lake Wind Advisory	GGW	8 hr
Aug 11, 3:33 PM MDT	Special Weather Statement	GGW	57 min
Aug 11, 3:40 PM MDT	Mesoscale Discussion	SPC	95 min
Aug 11, 3:48 PM MDT	Severe Thunderstorm Warning	GGW	57 min
Aug 11, 4:56 PM MDT	Severe Thunderstorm Warning	GGW	34 min
Aug 11, 5:26 PM MDT	Special Weather Statement	GGW	49 min
Aug 11, 5:26 PM MDT	Severe Thunderstorm Warning	GGW	26 min
Aug 14, 5:38 PM MDT	Severe Thunderstorm Warning	GGW	18 min
Aug 14, 5:59 PM MDT	Severe Thunderstorm Warning	GGW	17 min
Aug 14, 6:58 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Aug 14, 7:13 PM MDT	Tornado Warning	GGW	40 min
Aug 14, 7:58 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Aug 14, 9:47 PM MDT	Red Flag Warning	GGW	5 hr
Aug 15, 3:11 PM MDT	Lake Wind Advisory	GGW	23 hr
Aug 15, 9:06 PM MDT	Special Weather Statement	GGW	54 min
Aug 17, 3:00 PM MDT	Lake Wind Advisory	GGW	26 hr
Aug 21, 3:39 AM MDT	Fire Weather Watch	GGW	23 hr
Aug 21, 7:35 PM MDT	Special Weather Statement	GGW	55 min
Aug 22, 2:53 AM MDT	Red Flag Warning	GGW	17 hr
Aug 22, 2:35 PM MDT	Lake Wind Advisory	GGW	30 hr
Aug 23, 2:48 AM MDT	Red Flag Warning	GGW	18 hr
Aug 24, 2:11 PM MDT	Fire Weather Watch	GGW	13 hr
Aug 25, 3:35 AM MDT	Red Flag Warning	GGW	17 hr
Aug 25, 3:36 AM MDT	Lake Wind Advisory	GGW	17 hr
Aug 26, 9:17 PM MDT	Special Weather Statement	GGW	58 min
Aug 26, 10:02 PM MDT	Special Weather Statement	GGW	58 min
Aug 26, 10:19 PM MDT	Special Weather Statement	GGW	56 min
Aug 27, 6:30 PM MDT	Mesoscale Discussion	SPC	90 min
Aug 29, 3:10 AM MDT	Lake Wind Advisory	GGW	16 hr
Aug 31, 1:46 AM MDT	Special Weather Statement	GGW	59 min
Aug 31, 3:33 AM MDT	Lake Wind Advisory	GGW	32 hr
Aug 31, 6:22 PM MDT	Severe Thunderstorm Warning	GGW	53 min
Aug 31, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	53 min
Aug 31, 6:53 PM MDT	Severe Thunderstorm Warning	GGW	67 min
Aug 31, 7:15 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Sep 1, 2:38 PM MDT	Lake Wind Advisory	GGW	37 hr
Sep 6, 3:05 AM MDT	Red Flag Warning	GGW	17 hr
Sep 11, 3:00 AM MDT	Lake Wind Advisory	GGW	31 hr
Sep 11, 3:03 AM MDT	Red Flag Warning	GGW	18 hr
Sep 14, 3:03 PM MDT	Lake Wind Advisory	GGW	36 hr
Sep 18, 3:26 AM MDT	Lake Wind Advisory	GGW	15 hr
Sep 18, 6:25 PM MDT	Lake Wind Advisory	GGW	33 hr
Sep 19, 1:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 19, 3:27 PM MDT	Special Weather Statement	GGW	48 min
Sep 20, 3:46 AM MDT	Lake Wind Advisory	GGW	6 hr
Sep 22, 2:25 PM MDT	Fire Weather Watch	GGW	12 hr
Sep 23, 2:53 AM MDT	Red Flag Warning	GGW	17 hr
Sep 24, 2:54 PM MDT	Fire Weather Watch	GGW	12 hr
Sep 25, 3:21 AM MDT	Red Flag Warning	GGW	17 hr
Sep 25, 2:42 PM MDT	Lake Wind Advisory	GGW	27 hr
Sep 27, 9:59 AM MDT	Red Flag Warning	GGW	34 hr
Sep 27, 2:27 PM MDT	Lake Wind Advisory	GGW	30 hr
Sep 27, 2:49 PM MDT	Red Flag Warning	GGW	29 hr
Sep 30, 2:19 PM MDT	Fire Weather Watch	GGW	13 hr
Oct 1, 3:41 AM MDT	Red Flag Warning	GGW	23 hr
Oct 3, 2:42 PM MDT	Red Flag Warning	GGW	29 hr
Oct 3, 3:05 PM MDT	Lake Wind Advisory	GGW	27 hr
Oct 6, 2:57 PM MDT	High Wind Watch	GGW	13 hr
Oct 7, 4:23 AM MDT	High Wind Warning	GGW	13 hr
Oct 7, 5:10 PM MDT	Lake Wind Advisory	GGW	10 hr
Oct 11, 2:54 PM MDT	Lake Wind Advisory	GGW	29 hr
Oct 13, 2:08 AM MDT	Lake Wind Advisory	GGW	16 hr
Oct 21, 2:26 PM MDT	Lake Wind Advisory	GGW	27 hr
Oct 23, 3:02 AM MDT	Lake Wind Advisory	GGW	16 hr
Oct 26, 2:36 PM MDT	Lake Wind Advisory	GGW	24 hr
Oct 28, 2:19 PM MDT	Lake Wind Advisory	GGW	29 hr
Oct 31, 2:27 PM MDT	Lake Wind Advisory	GGW	5 hr
Nov 2, 3:37 AM MDT	Lake Wind Advisory	GGW	15 hr
Nov 2, 10:59 PM MDT	Lake Wind Advisory	GGW	13 hr
Nov 5, 3:41 AM MDT	Winter Weather Advisory	GGW	38 hr
Nov 6, 8:53 AM MST	Lake Wind Advisory	GGW	8 hr
Nov 8, 1:23 PM MST	Lake Wind Advisory	GGW	4 hr
Nov 11, 2:33 PM MST	Lake Wind Advisory	GGW	27 hr
Nov 13, 3:45 AM MST	Lake Wind Advisory	GGW	14 hr
Nov 14, 3:32 AM MST	Lake Wind Advisory	GGW	11 hr
Nov 15, 3:30 AM MST	Lake Wind Advisory	GGW	14 hr
Nov 17, 2:54 AM MST	Lake Wind Advisory	GGW	20 hr
Nov 17, 2:55 PM MST	Wind Chill Advisory	GGW	43 hr
Nov 18, 4:02 AM MST	Lake Wind Advisory	GGW	15 hr
Nov 19, 2:57 PM MST	Wind Chill Advisory	GGW	19 hr
Nov 23, 10:06 AM MST	Lake Wind Advisory	GGW	8 hr
Nov 25, 2:44 AM MST	Lake Wind Advisory	GGW	31 hr
Nov 25, 3:54 AM MST	Dense Fog Advisory	GGW	8 hr
Nov 26, 2:53 PM MST	Lake Wind Advisory	GGW	30 hr
Nov 26, 2:56 PM MST	Fire Weather Watch	GGW	12 hr
Nov 27, 3:15 AM MST	Red Flag Warning	GGW	17 hr
Nov 29, 2:33 PM MST	Winter Weather Advisory	GGW	37 hr
Dec 3, 3:18 AM MST	Winter Weather Advisory	GGW	38 hr
Dec 12, 9:27 PM MST	Dense Fog Advisory	GGW	35 hr
Dec 16, 8:26 AM MST	Dense Fog Advisory	GGW	18 hr
Dec 21, 1:49 AM MST	Winter Weather Advisory	GGW	13 hr
Dec 26, 2:41 AM MST	High Wind Warning	GGW	12 hr
Dec 28, 3:38 AM MST	High Wind Watch	GGW	24 hr
Dec 29, 4:05 AM MST	High Wind Warning	GGW	19 hr
Dec 30, 3:23 AM MST	High Wind Watch	GGW	23 hr
Dec 31, 2:45 AM MST	High Wind Warning	GGW	12 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	62
Tornado Warning	4
Severe Thunderstorm Watch	6
Tornado Watch	2
Mesoscale Discussion	15
Special Weather Statement	36
Flooding
Areal Flood Warning	20
Flash Flood Warning	13
River Flood Warning	11
Flash Flood Watch	6
Flood Watch	6
River Flood Watch	2
Areal Flood Advisory	6
Winter
Blizzard Warning	2
Winter Storm Warning	4
Winter Storm Watch	5
Freezing Rain Advisory	1
Winter Weather Advisory	23
Heat
Heat Advisory	1
Cold
Wind Chill Warning	6
Wind Chill Watch	1
Wind Chill Advisory	21
Wind and dust
High Wind Warning	6
High Wind Watch	6
Lake Wind Advisory	63
Fire
Red Flag Warning	13
Fire Weather Watch	6
Fog and smoke
Dense Fog Advisory	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2010 2012

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.