Weather alerts in Valley County, Montana, 2016

211 weather alerts in 2016, 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 2016. Tap one for its archive.

Alerts: 211
Warnings: 76
Watches: 16
Advisories: 77
Busiest month: June61 alerts
Busiest day: May 22, 201613 alerts

Over time

By month

Warning verification

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

Valley County, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	56	34	39%	57	84%	26 min
Flash flood warnings	1	1	0%	1	100%	7 min

Each office's whole area, 2016

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Glasgow, MT: tornado warnings	3	0	100%	1	0%
NWS Glasgow, MT: severe thunderstorm warnings	144	78	46%	242	78%	28 min
NWS Glasgow, MT: flash flood warnings	1	1	0%	1	100%	7 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 14, 2:03 PM MST	Freezing Rain Advisory	GGW	6 hr
Jan 15, 2:17 PM MST	Wind Chill Advisory	GGW	44 hr
Jan 17, 2:08 PM MST	Wind Chill Advisory	GGW	19 hr
Jan 25, 8:29 PM MST	Dense Fog Advisory	GGW	13 hr
Feb 1, 2:42 AM MST	Freezing Fog Advisory	GGW	7 hr
Feb 2, 10:04 PM MST	Dense Fog Advisory	GGW	8 hr
Feb 5, 3:54 AM MST	High Wind Watch	GGW	11 hr
Feb 5, 2:34 PM MST	High Wind Warning	GGW	50 hr
Feb 10, 9:35 PM MST	Winter Weather Advisory	GGW	14 hr
Feb 13, 8:47 AM MST	Freezing Rain Advisory	GGW	6 hr
Feb 16, 7:58 AM MST	Freezing Rain Advisory	GGW	4 hr
Feb 16, 8:13 PM MST	Dense Fog Advisory	GGW	19 hr
Feb 17, 7:45 PM MST	Dense Fog Advisory	GGW	22 hr
Feb 18, 6:07 PM MST	High Wind Warning	GGW	24 hr
Mar 1, 1:26 PM MST	Winter Weather Advisory	GGW	13 hr
Mar 2, 10:19 AM MST	Winter Weather Advisory	GGW	6 hr
Mar 13, 2:09 PM MDT	Lake Wind Advisory	GGW	54 hr
Mar 16, 3:01 AM MDT	Lake Wind Advisory	GGW	17 hr
Mar 17, 2:50 AM MDT	Lake Wind Advisory	GGW	18 hr
Mar 21, 2:57 AM MDT	Lake Wind Advisory	GGW	16 hr
Mar 22, 3:03 AM MDT	Lake Wind Advisory	GGW	17 hr
Mar 24, 2:00 PM MDT	Lake Wind Advisory	GGW	23 hr
Mar 29, 2:44 AM MDT	Lake Wind Advisory	GGW	18 hr
Mar 30, 3:18 AM MDT	Lake Wind Advisory	GGW	41 hr
Apr 2, 2:46 AM MDT	Lake Wind Advisory	GGW	17 hr
Apr 3, 3:07 AM MDT	Lake Wind Advisory	GGW	17 hr
Apr 4, 3:03 AM MDT	High Wind Watch	GGW	12 hr
Apr 4, 2:53 PM MDT	High Wind Warning	GGW	30 hr
Apr 6, 3:10 AM MDT	Lake Wind Advisory	GGW	41 hr
Apr 6, 4:26 PM MDT	Special Weather Statement	GGW	49 min
Apr 8, 2:19 PM MDT	Lake Wind Advisory	GGW	30 hr
Apr 10, 3:31 AM MDT	Lake Wind Advisory	GGW	15 hr
Apr 14, 9:09 PM MDT	Lake Wind Advisory	GGW	24 hr
Apr 22, 2:37 PM MDT	Lake Wind Advisory	GGW	37 hr
May 6, 4:38 AM MDT	Lake Wind Advisory	GGW	10 hr
May 8, 3:08 AM MDT	Lake Wind Advisory	GGW	18 hr
May 9, 3:02 AM MDT	Lake Wind Advisory	GGW	66 hr
May 10, 10:01 AM MDT	Areal Flood Warning	GGW	48 hr
May 10, 10:01 AM MDT	Areal Flood Warning	GGW	48 hr
May 10, 10:01 AM MDT	Areal Flood Warning	GGW	48 hr
May 10, 9:52 PM MDT	River Flood Warning	GGW	3 days
May 10, 9:52 PM MDT	River Flood Warning	GGW	3 days
May 12, 9:11 AM MDT	Areal Flood Warning	GGW	69 hr
May 15, 6:08 AM MDT	Areal Flood Warning	GGW	3 days
May 20, 3:33 AM MDT	Lake Wind Advisory	GGW	47 hr
May 21, 2:26 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 21, 4:37 PM MDT	Mesoscale Discussion	SPC	53 min
May 21, 5:42 PM MDT	Severe Thunderstorm Warning	GGW	63 min
May 21, 5:53 PM MDT	Severe Thunderstorm Warning	GGW	67 min
May 21, 6:04 PM MDT	Severe Thunderstorm Warning	GGW	26 min
May 21, 6:10 PM MDT	Severe Thunderstorm Warning	GGW	48 min
May 21, 6:18 PM MDT	Severe Thunderstorm Warning	GGW	57 min
May 21, 6:26 PM MDT	Severe Thunderstorm Warning	GGW	64 min
May 21, 6:38 PM MDT	Mesoscale Discussion	SPC	67 min
May 21, 7:06 PM MDT	Severe Thunderstorm Warning	GGW	54 min
May 21, 7:18 PM MDT	Severe Thunderstorm Warning	GGW	27 min
May 21, 7:45 PM MDT	Severe Thunderstorm Warning	GGW	30 min
May 21, 7:49 PM MDT	Severe Thunderstorm Warning	GGW	14 min
May 21, 7:58 PM MDT	Special Weather Statement	GGW	47 min
May 21, 8:14 PM MDT	Special Weather Statement	GGW	46 min
May 21, 8:39 PM MDT	Special Weather Statement	GGW	66 min
May 22, 3:22 AM MDT	Lake Wind Advisory	GGW	19 hr
May 23, 3:18 AM MDT	Lake Wind Advisory	GGW	18 hr
May 30, 2:56 AM MDT	Lake Wind Advisory	GGW	42 hr
Jun 2, 7:26 PM MDT	Lake Wind Advisory	GGW	25 hr
Jun 9, 1:01 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 9, 2:51 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 9, 5:22 PM MDT	Severe Thunderstorm Warning	GGW	42 min
Jun 9, 6:05 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 10, 3:20 AM MDT	Lake Wind Advisory	GGW	43 hr
Jun 10, 3:06 PM MDT	Severe Thunderstorm Watch	SPC	11 hr
Jun 10, 8:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 10, 9:28 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Jun 10, 10:26 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jun 10, 11:09 PM MDT	Severe Thunderstorm Warning	GGW	66 min
Jun 11, 12:12 AM MDT	Special Weather Statement	GGW	48 min
Jun 11, 1:17 AM MDT	Special Weather Statement	GGW	58 min
Jun 11, 1:37 AM MDT	Severe Thunderstorm Warning	GGW	53 min
Jun 11, 2:12 AM MDT	Severe Thunderstorm Warning	GGW	47 min
Jun 11, 9:32 AM MDT	Severe Thunderstorm Warning	GGW	43 min
Jun 11, 2:50 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 11, 3:00 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 11, 5:28 PM MDT	Mesoscale Discussion	SPC	92 min
Jun 11, 7:36 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 11, 9:28 PM MDT	Areal Flood Advisory	GGW	3 hr
Jun 13, 1:37 PM MDT	Mesoscale Discussion	SPC	53 min
Jun 13, 3:40 PM MDT	Mesoscale Discussion	SPC	95 min
Jun 14, 2:17 PM MDT	Lake Wind Advisory	GGW	8 hr
Jun 14, 4:03 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 14, 5:09 PM MDT	Severe Thunderstorm Warning	GGW	51 min
Jun 14, 5:56 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jun 14, 6:55 PM MDT	Severe Thunderstorm Warning	GGW	41 min
Jun 15, 11:18 PM MDT	Severe Thunderstorm Warning	GGW	27 min
Jun 15, 11:44 PM MDT	Severe Thunderstorm Warning	GGW	46 min
Jun 15, 11:54 PM MDT	Severe Thunderstorm Warning	GGW	35 min
Jun 16, 12:26 AM MDT	Severe Thunderstorm Warning	GGW	49 min
Jun 16, 1:01 AM MDT	Severe Thunderstorm Warning	GGW	59 min
Jun 16, 1:24 AM MDT	Severe Thunderstorm Warning	GGW	66 min
Jun 16, 1:47 AM MDT	Special Weather Statement	GGW	43 min
Jun 16, 2:23 AM MDT	Special Weather Statement	GGW	52 min
Jun 18, 2:43 PM MDT	Mesoscale Discussion	SPC	92 min
Jun 18, 3:16 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 18, 3:24 PM MDT	Lake Wind Advisory	GGW	31 hr
Jun 18, 5:56 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 7:22 PM MDT	Severe Thunderstorm Warning	GGW	53 min
Jun 18, 7:38 PM MDT	Areal Flood Advisory	GGW	3 hr
Jun 18, 8:11 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jun 18, 8:21 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Jun 18, 9:02 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Jun 21, 3:04 AM MDT	Lake Wind Advisory	GGW	24 hr
Jun 21, 1:46 PM MDT	Mesoscale Discussion	SPC	119 min
Jun 21, 3:09 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 21, 4:15 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jun 21, 5:13 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Jun 21, 5:19 PM MDT	Severe Thunderstorm Warning	GGW	56 min
Jun 21, 6:13 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Jun 24, 2:20 PM MDT	Lake Wind Advisory	GGW	30 hr
Jun 24, 3:51 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 24, 4:16 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 24, 6:19 PM MDT	Special Weather Statement	GGW	41 min
Jun 24, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	67 min
Jun 24, 7:06 PM MDT	Mesoscale Discussion	SPC	114 min
Jun 26, 4:59 PM MDT	Special Weather Statement	GGW	46 min
Jun 26, 5:42 PM MDT	Special Weather Statement	GGW	48 min
Jun 26, 6:40 PM MDT	Special Weather Statement	GGW	50 min
Jul 2, 12:49 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 9:38 PM MDT	Flash Flood Warning	GGW	3 hr
Jul 2, 9:45 PM MDT	Special Weather Statement	GGW	60 min
Jul 3, 2:17 AM MDT	Severe Thunderstorm Warning	GGW	58 min
Jul 3, 3:09 AM MDT	Special Weather Statement	GGW	51 min
Jul 8, 9:19 PM MDT	Lake Wind Advisory	GGW	6 hr
Jul 8, 10:49 PM MDT	Special Weather Statement	GGW	56 min
Jul 9, 7:04 PM MDT	Severe Thunderstorm Warning	GGW	56 min
Jul 9, 7:51 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Jul 11, 3:02 AM MDT	Lake Wind Advisory	GGW	42 hr
Jul 18, 10:56 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jul 18, 11:54 PM MDT	Severe Thunderstorm Warning	GGW	66 min
Jul 19, 12:19 AM MDT	Mesoscale Discussion	SPC	116 min
Jul 19, 12:27 AM MDT	Severe Thunderstorm Warning	GGW	63 min
Jul 19, 6:58 PM MDT	Severe Thunderstorm Warning	GGW	31 min
Jul 22, 3:06 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 22, 8:45 PM MDT	Severe Thunderstorm Warning	GGW	45 min
Jul 22, 9:56 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jul 23, 2:51 AM MDT	Lake Wind Advisory	GGW	18 hr
Jul 26, 11:14 PM MDT	Special Weather Statement	GGW	61 min
Jul 30, 4:50 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 30, 6:21 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Jul 30, 6:51 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Jul 30, 7:15 PM MDT	Severe Thunderstorm Warning	GGW	35 min
Jul 30, 7:41 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Jul 30, 8:12 PM MDT	Severe Thunderstorm Warning	GGW	33 min
Jul 30, 8:38 PM MDT	Severe Thunderstorm Warning	GGW	52 min
Jul 30, 9:07 PM MDT	Special Weather Statement	GGW	53 min
Jul 30, 9:18 PM MDT	Severe Thunderstorm Warning	GGW	57 min
Jul 30, 9:24 PM MDT	Severe Thunderstorm Warning	GGW	36 min
Jul 30, 9:43 PM MDT	Special Weather Statement	GGW	62 min
Jul 30, 10:10 PM MDT	Severe Thunderstorm Warning	GGW	35 min
Jul 31, 5:15 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Aug 2, 2:22 PM MDT	Lake Wind Advisory	GGW	36 hr
Aug 9, 4:53 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 9, 5:35 PM MDT	Mesoscale Discussion	SPC	85 min
Aug 9, 9:59 PM MDT	Severe Thunderstorm Warning	GGW	61 min
Aug 9, 10:46 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Aug 9, 11:45 PM MDT	Special Weather Statement	GGW	45 min
Aug 10, 12:23 AM MDT	Special Weather Statement	GGW	67 min
Aug 14, 7:01 PM MDT	Special Weather Statement	GGW	59 min
Aug 17, 2:14 PM MDT	Lake Wind Advisory	GGW	13 hr
Aug 22, 2:44 PM MDT	Lake Wind Advisory	GGW	54 hr
Aug 31, 2:23 PM MDT	Fire Weather Watch	GGW	37 hr
Sep 2, 3:18 AM MDT	Red Flag Warning	GGW	18 hr
Sep 7, 3:03 AM MDT	Lake Wind Advisory	GGW	17 hr
Sep 8, 2:39 AM MDT	Lake Wind Advisory	GGW	19 hr
Sep 8, 5:42 PM MDT	Special Weather Statement	GGW	48 min
Sep 11, 2:57 AM MDT	Lake Wind Advisory	GGW	18 hr
Sep 17, 2:09 PM MDT	Lake Wind Advisory	GGW	31 hr
Sep 21, 2:48 PM MDT	Lake Wind Advisory	GGW	4 days
Oct 3, 2:43 AM MDT	Lake Wind Advisory	GGW	66 hr
Oct 3, 2:22 PM MDT	Winter Weather Advisory	GGW	42 hr
Oct 3, 5:16 PM MDT	Areal Flood Advisory	GGW	3 hr
Oct 4, 8:05 AM MDT	Areal Flood Advisory	GGW	48 hr
Oct 4, 10:21 AM MDT	River Flood Warning	GGW	6 days
Oct 4, 12:02 PM MDT	Areal Flood Warning	GGW	11 days
Oct 5, 10:01 AM MDT	River Flood Watch	GGW	6 days
Oct 5, 10:01 AM MDT	River Flood Watch	GGW	6 days
Oct 5, 8:48 PM MDT	River Flood Watch	GGW	5 days
Oct 6, 5:38 AM MDT	River Flood Warning	GGW	6 days
Oct 6, 5:38 AM MDT	River Flood Warning	GGW	8 days
Oct 6, 5:38 AM MDT	River Flood Warning	GGW	5 days
Oct 6, 9:52 AM MDT	River Flood Warning	GGW	5 days
Oct 9, 2:49 PM MDT	Winter Weather Advisory	GGW	24 hr
Oct 11, 10:01 AM MDT	River Flood Warning	GGW	7 days
Oct 14, 2:51 AM MDT	Lake Wind Advisory	GGW	18 hr
Oct 16, 2:44 AM MDT	Lake Wind Advisory	GGW	17 hr
Oct 31, 2:53 AM MDT	Lake Wind Advisory	GGW	24 hr
Nov 12, 2:48 PM MST	Lake Wind Advisory	GGW	24 hr
Nov 14, 3:09 AM MST	Lake Wind Advisory	GGW	17 hr
Nov 15, 2:02 PM MST	Lake Wind Advisory	GGW	27 hr
Nov 19, 2:54 AM MST	Lake Wind Advisory	GGW	14 hr
Dec 5, 10:45 PM MST	Wind Chill Advisory	GGW	36 hr
Dec 7, 11:18 AM MST	Wind Chill Advisory	GGW	25 hr
Dec 8, 11:59 AM MST	Wind Chill Advisory	GGW	24 hr
Dec 9, 2:04 PM MST	Winter Weather Advisory	GGW	37 hr
Dec 11, 2:58 AM MST	Wind Chill Advisory	GGW	54 hr
Dec 13, 3:05 PM MST	Wind Chill Advisory	GGW	20 hr
Dec 14, 10:06 PM MST	Winter Weather Advisory	GGW	41 hr
Dec 15, 2:36 PM MST	Wind Chill Advisory	GGW	45 hr
Dec 17, 12:13 PM MST	Wind Chill Advisory	GGW	21 hr
Dec 20, 8:19 PM MST	High Wind Warning	GGW	9 hr
Dec 21, 2:28 PM MST	Winter Storm Watch	GGW	48 hr
Dec 23, 2:52 PM MST	Winter Weather Advisory	GGW	60 hr
Dec 30, 12:37 PM MST	Winter Weather Advisory	GGW	7 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	56
Severe Thunderstorm Watch	9
Mesoscale Discussion	20
Special Weather Statement	22
Flooding
Areal Flood Warning	6
Flash Flood Warning	1
River Flood Warning	8
River Flood Watch	3
Areal Flood Advisory	4
Winter
Winter Storm Watch	1
Freezing Rain Advisory	3
Winter Weather Advisory	9
Cold
Wind Chill Advisory	9
Wind and dust
High Wind Warning	4
High Wind Watch	2
Lake Wind Advisory	47
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	4
Freezing 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 2015 2017

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.