Weather alerts in Valley County, Montana, 2024

213 weather alerts in 2024, 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 2024. Tap one for its archive.

Alerts: 213
Warnings: 60
Watches: 22
Advisories: 70
Busiest month: July39 alerts
Busiest day: July 13, 202414 alerts

Over time

By month

Warning verification

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

3 of 4 tornado warnings covering Valley County in 2024 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 23 minutes after it went out.

Valley County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	3	25%	3	100%	23 min
Severe thunderstorm warnings	37	19	49%	23	91%	29 min
Flash flood warnings	0			1	0%

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Glasgow, MT: tornado warnings	7	3	57%	3	100%	23 min
NWS Glasgow, MT: severe thunderstorm warnings	92	47	49%	157	73%	31 min
NWS Glasgow, MT: flash flood warnings	0			1	0%

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 2, 8:41 AM MST	Dense Fog Advisory	GGW	5 hr
Jan 2, 4:42 PM MST	Dense Fog Advisory	GGW	18 hr
Jan 4, 9:57 PM MST	Dense Fog Advisory	GGW	13 hr
Jan 9, 3:00 AM MST	Wind Chill Advisory	GGW	3 days
Jan 12, 2:32 AM MST	Wind Chill Warning	GGW	3 days
Jan 15, 6:38 AM MST	Wind Chill Advisory	GGW	28 hr
Jan 16, 2:11 PM MST	Winter Weather Advisory	GGW	56 hr
Jan 17, 2:30 AM MST	Wind Chill Advisory	GGW	3 days
Jan 20, 1:44 PM MST	Winter Weather Advisory	GGW	32 hr
Jan 22, 5:49 PM MST	Dense Fog Advisory	GGW	41 hr
Jan 25, 6:11 AM MST	Dense Fog Advisory	GGW	5 hr
Jan 25, 6:10 PM MST	Dense Fog Advisory	GGW	15 hr
Feb 3, 8:10 AM MST	Dense Fog Advisory	GGW	6 hr
Feb 3, 10:20 PM MST	Dense Fog Advisory	GGW	13 hr
Feb 5, 8:07 AM MST	Dense Fog Advisory	GGW	4 hr
Feb 5, 8:07 PM MST	Dense Fog Advisory	GGW	37 hr
Feb 6, 2:21 AM MST	Winter Weather Advisory	GGW	72 hr
Feb 7, 9:11 AM MST	Winter Storm Warning	GGW	12 hr
Feb 10, 9:38 PM MST	Dense Fog Advisory	GGW	8 hr
Feb 15, 2:06 AM MST	Wind Chill Advisory	GGW	25 hr
Feb 25, 2:15 PM MST	Wind Chill Advisory	GGW	44 hr
Mar 1, 1:20 PM MST	Winter Storm Watch	GGW	13 hr
Mar 1, 1:20 PM MST	Winter Weather Advisory	GGW	61 hr
Mar 2, 2:25 AM MST	Winter Storm Warning	GGW	39 hr
Mar 3, 2:04 AM MST	Wind Chill Advisory	GGW	31 hr
Mar 19, 1:59 PM MDT	Winter Weather Advisory	GGW	56 hr
Mar 21, 3:07 AM MDT	Winter Storm Watch	GGW	34 hr
Mar 22, 1:14 PM MDT	Winter Storm Warning	GGW	56 hr
Apr 9, 2:32 AM MDT	Lake Wind Advisory	GGW	41 hr
Apr 14, 2:31 PM MDT	Fire Weather Watch	GGW	24 hr
Apr 15, 2:15 AM MDT	Lake Wind Advisory	GGW	26 hr
Apr 15, 2:49 PM MDT	Red Flag Warning	GGW	30 hr
Apr 16, 7:16 AM MDT	Lake Wind Advisory	GGW	3 days
Apr 20, 2:53 PM MDT	Fire Weather Watch	GGW	22 hr
Apr 21, 8:57 AM MDT	Lake Wind Advisory	GGW	40 hr
Apr 21, 12:51 PM MDT	Red Flag Warning	GGW	32 hr
Apr 22, 1:30 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Apr 22, 2:11 PM MDT	Special Weather Statement	GGW	64 min
Apr 22, 2:51 PM MDT	Severe Thunderstorm Warning	GGW	54 min
Apr 22, 3:02 PM MDT	Severe Thunderstorm Warning	GGW	58 min
Apr 22, 3:15 PM MDT	Special Weather Statement	GGW	60 min
Apr 22, 3:42 PM MDT	Severe Thunderstorm Warning	GGW	63 min
Apr 22, 4:19 PM MDT	Special Weather Statement	GGW	56 min
Apr 22, 4:46 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Apr 24, 11:21 AM MDT	Red Flag Warning	GGW	8 hr
Apr 25, 2:38 AM MDT	Fire Weather Watch	GGW	12 hr
Apr 25, 2:32 PM MDT	Red Flag Warning	GGW	29 hr
Apr 29, 1:17 PM MDT	Lake Wind Advisory	GGW	32 hr
Apr 30, 6:47 PM MDT	Special Weather Statement	GGW	58 min
May 2, 2:56 AM MDT	Lake Wind Advisory	GGW	17 hr
May 3, 1:09 PM MDT	Lake Wind Advisory	GGW	62 hr
May 5, 2:52 AM MDT	High Wind Watch	GGW	24 hr
May 6, 2:57 AM MDT	High Wind Warning	GGW	42 hr
May 8, 2:03 AM MDT	Lake Wind Advisory	GGW	16 hr
May 13, 5:33 PM MDT	Special Weather Statement	GGW	57 min
May 13, 7:24 PM MDT	Severe Thunderstorm Warning	GGW	44 min
May 15, 5:13 PM MDT	Special Weather Statement	GGW	62 min
May 16, 2:38 PM MDT	Lake Wind Advisory	GGW	53 hr
May 16, 4:59 PM MDT	Special Weather Statement	GGW	61 min
May 16, 5:50 PM MDT	Severe Thunderstorm Warning	GGW	55 min
May 16, 8:17 PM MDT	Special Weather Statement	GGW	28 min
May 17, 2:53 PM MDT	Special Weather Statement	GGW	67 min
May 20, 3:16 PM MDT	Special Weather Statement	GGW	59 min
May 20, 3:57 PM MDT	Special Weather Statement	GGW	48 min
May 24, 7:19 PM MDT	Special Weather Statement	GGW	56 min
May 25, 9:38 AM MDT	Lake Wind Advisory	GGW	35 hr
May 25, 5:55 PM MDT	Special Weather Statement	GGW	65 min
May 28, 2:51 PM MDT	Lake Wind Advisory	GGW	52 hr
May 29, 4:36 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 3, 1:28 PM MDT	Lake Wind Advisory	GGW	57 hr
Jun 3, 6:43 PM MDT	Special Weather Statement	GGW	62 min
Jun 3, 6:53 PM MDT	Severe Thunderstorm Warning	GGW	52 min
Jun 9, 1:39 PM MDT	Lake Wind Advisory	GGW	31 hr
Jun 10, 2:09 PM MDT	Special Weather Statement	GGW	66 min
Jun 10, 8:48 PM MDT	Special Weather Statement	GGW	57 min
Jun 11, 1:43 PM MDT	Lake Wind Advisory	GGW	30 hr
Jun 15, 2:11 AM MDT	Lake Wind Advisory	GGW	43 hr
Jun 15, 2:27 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 4:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 15, 5:16 PM MDT	Special Weather Statement	GGW	59 min
Jun 15, 5:30 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Jun 15, 6:28 PM MDT	Severe Thunderstorm Warning Destructive damage threat	GGW	62 min
Jun 15, 7:27 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	63 min
Jun 17, 10:00 PM MDT	Lake Wind Advisory	GGW	15 hr
Jun 19, 4:53 PM MDT	Special Weather Statement	GGW	67 min
Jun 23, 5:58 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 23, 6:01 PM MDT	Special Weather Statement	GGW	59 min
Jun 23, 6:54 PM MDT	Severe Thunderstorm Warning	GGW	44 min
Jun 23, 11:57 PM MDT	Severe Thunderstorm Warning	GGW	33 min
Jun 27, 1:02 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 27, 3:44 PM MDT	Special Weather Statement	GGW	61 min
Jun 27, 4:45 PM MDT	Special Weather Statement	GGW	60 min
Jun 27, 7:59 PM MDT	Lake Wind Advisory	GGW	25 hr
Jun 30, 6:14 PM MDT	Mesoscale Discussion	SPC	91 min
Jul 1, 4:04 PM MDT	Special Weather Statement	GGW	56 min
Jul 2, 11:39 AM MDT	Special Weather Statement	GGW	66 min
Jul 2, 12:43 PM MDT	Special Weather Statement	GGW	62 min
Jul 2, 1:41 PM MDT	Special Weather Statement	GGW	64 min
Jul 5, 2:31 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 5, 2:41 PM MDT	Special Weather Statement	GGW	64 min
Jul 5, 3:09 PM MDT	Severe Thunderstorm Warning	GGW	66 min
Jul 6, 7:22 PM MDT	Special Weather Statement	GGW	53 min
Jul 6, 8:29 PM MDT	Special Weather Statement	GGW	91 min
Jul 10, 1:24 AM MDT	Heat Advisory	GGW	68 hr
Jul 12, 6:38 PM MDT	Severe Thunderstorm Warning	GGW	67 min
Jul 12, 6:47 PM MDT	Tornado Warning	GGW	28 min
Jul 12, 7:05 PM MDT	Tornado Warning Tornado observed	GGW	25 min
Jul 12, 7:21 PM MDT	Tornado Warning Tornado observed	GGW	24 min
Jul 12, 7:47 PM MDT	Tornado Warning Tornado observed	GGW	28 min
Jul 12, 7:49 PM MDT	Special Weather Statement	GGW	56 min
Jul 12, 8:16 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Jul 13, 1:44 PM MDT	Mesoscale Discussion	SPC	91 min
Jul 13, 2:08 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 13, 4:09 PM MDT	Special Weather Statement	GGW	66 min
Jul 13, 4:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	62 min
Jul 13, 4:41 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 13, 4:50 PM MDT	Severe Thunderstorm Warning	GGW	55 min
Jul 13, 5:14 PM MDT	Severe Thunderstorm Warning	GGW	31 min
Jul 14, 3:59 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 14, 10:35 PM MDT	Special Weather Statement	GGW	55 min
Jul 20, 6:56 PM MDT	Special Weather Statement	GGW	64 min
Jul 21, 12:43 PM MDT	Excessive Heat Watch	GGW	25 hr
Jul 22, 1:27 PM MDT	Excessive Heat Warning	GGW	3 days
Jul 24, 2:44 AM MDT	Fire Weather Watch	GGW	12 hr
Jul 24, 2:55 PM MDT	Red Flag Warning	GGW	33 hr
Jul 25, 3:47 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 25, 6:03 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	57 min
Jul 25, 6:49 PM MDT	Mesoscale Discussion	SPC	56 min
Jul 25, 6:55 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	65 min
Jul 27, 6:47 PM MDT	Fire Weather Watch	GGW	19 hr
Jul 28, 1:47 PM MDT	Red Flag Warning	GGW	31 hr
Jul 31, 1:26 PM MDT	Heat Advisory	GGW	3 days
Aug 2, 8:24 PM MDT	Lake Wind Advisory	GGW	7 hr
Aug 15, 9:06 AM MDT	Dense Smoke Advisory	GGW	18 hr
Aug 17, 12:29 AM MDT	Special Weather Statement	GGW	61 min
Aug 17, 1:27 AM MDT	Special Weather Statement	GGW	33 min
Aug 19, 12:43 PM MDT	Special Weather Statement	GGW	47 min
Aug 20, 2:39 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 20, 8:53 PM MDT	Special Weather Statement	GGW	67 min
Aug 20, 9:16 PM MDT	Severe Thunderstorm Warning	GGW	59 min
Aug 20, 10:15 PM MDT	Severe Thunderstorm Warning	GGW	60 min
Aug 21, 4:28 PM MDT	Severe Thunderstorm Warning	GGW	62 min
Aug 21, 5:16 PM MDT	Mesoscale Discussion	SPC	119 min
Aug 21, 6:26 PM MDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 21, 7:07 PM MDT	Severe Thunderstorm Warning	GGW	38 min
Aug 21, 7:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 22, 7:11 PM MDT	Lake Wind Advisory	GGW	31 hr
Aug 23, 4:34 PM MDT	Special Weather Statement	GGW	56 min
Aug 23, 4:39 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 4:56 PM MDT	Severe Thunderstorm Warning	GGW	34 min
Aug 23, 5:26 PM MDT	Severe Thunderstorm Warning	GGW	19 min
Aug 23, 5:57 PM MDT	Special Weather Statement	GGW	63 min
Aug 23, 6:13 PM MDT	Severe Thunderstorm Warning	GGW	32 min
Aug 23, 7:00 PM MDT	Severe Thunderstorm Warning	GGW	30 min
Aug 23, 7:26 PM MDT	Severe Thunderstorm Warning	GGW	49 min
Aug 23, 8:21 PM MDT	Severe Thunderstorm Warning	GGW	24 min
Aug 23, 9:09 PM MDT	Special Weather Statement	GGW	66 min
Aug 23, 10:04 PM MDT	Special Weather Statement	GGW	41 min
Aug 23, 10:39 PM MDT	Special Weather Statement	GGW	96 min
Aug 23, 11:33 PM MDT	Special Weather Statement	GGW	57 min
Aug 24, 12:29 AM MDT	Special Weather Statement	GGW	46 min
Aug 24, 10:30 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 24, 11:04 PM MDT	Severe Thunderstorm Warning	GGW	56 min
Aug 24, 11:51 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	69 min
Aug 27, 9:43 AM MDT	Lake Wind Advisory	GGW	59 hr
Sep 3, 9:00 PM MDT	Lake Wind Advisory	GGW	24 hr
Sep 4, 8:48 AM MDT	Dense Smoke Advisory	GGW	6 hr
Sep 10, 7:53 PM MDT	Lake Wind Advisory	GGW	15 hr
Sep 12, 1:17 AM MDT	Lake Wind Advisory	GGW	41 hr
Sep 12, 3:58 PM MDT	Mesoscale Discussion	SPC	92 min
Sep 12, 4:35 PM MDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 17, 5:25 PM MDT	Mesoscale Discussion	SPC	3 hr
Sep 17, 6:41 PM MDT	Severe Thunderstorm Warning	GGW	64 min
Sep 17, 7:06 PM MDT	Severe Thunderstorm Warning	GGW	39 min
Sep 17, 7:16 PM MDT	Special Weather Statement	GGW	59 min
Sep 18, 1:46 PM MDT	Lake Wind Advisory	GGW	28 hr
Sep 20, 2:10 AM MDT	Lake Wind Advisory	GGW	25 hr
Sep 20, 2:42 PM MDT	Mesoscale Discussion	SPC	93 min
Sep 20, 6:09 PM MDT	Severe Thunderstorm Warning	GGW	66 min
Sep 20, 6:29 PM MDT	Special Weather Statement	GGW	61 min
Sep 20, 6:55 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GGW	65 min
Sep 25, 1:23 PM MDT	Lake Wind Advisory	GGW	31 hr
Sep 26, 2:35 AM MDT	Red Flag Warning	GGW	15 hr
Sep 28, 1:52 PM MDT	Lake Wind Advisory	GGW	54 hr
Sep 28, 7:37 PM MDT	Fire Weather Watch	GGW	7 hr
Sep 29, 2:37 AM MDT	Fire Weather Watch	GGW	12 hr
Sep 29, 2:37 AM MDT	Red Flag Warning	GGW	24 hr
Sep 30, 2:22 AM MDT	Red Flag Warning	GGW	17 hr
Sep 30, 8:10 PM MDT	Red Flag Warning	GGW	23 hr
Oct 3, 2:08 AM MDT	High Wind Watch	GGW	24 hr
Oct 4, 1:56 AM MDT	High Wind Warning	GGW	42 hr
Oct 5, 2:42 AM MDT	Red Flag Warning	GGW	17 hr
Oct 16, 12:58 PM MDT	Lake Wind Advisory	GGW	25 hr
Oct 19, 2:14 AM MDT	Lake Wind Advisory	GGW	8 hr
Oct 21, 10:20 AM MDT	Lake Wind Advisory	GGW	17 hr
Oct 26, 5:36 PM MDT	Fire Weather Watch	GGW	9 hr
Oct 27, 1:39 PM MDT	Lake Wind Advisory	GGW	11 hr
Nov 5, 2:00 PM MST	Lake Wind Advisory	GGW	16 hr
Nov 9, 1:56 PM MST	Lake Wind Advisory	GGW	29 hr
Nov 11, 5:18 PM MST	Lake Wind Advisory	GGW	24 hr
Nov 13, 6:39 PM MST	Lake Wind Advisory	GGW	22 hr
Nov 18, 1:30 PM MST	Lake Wind Advisory	GGW	44 hr
Nov 21, 1:42 PM MST	Winter Weather Advisory	GGW	69 hr
Dec 7, 1:14 PM MST	Winter Weather Advisory	GGW	49 hr
Dec 8, 7:59 PM MST	Mesoscale Discussion	SPC	6 hr
Dec 13, 1:05 PM MST	Winter Storm Watch	GGW	24 hr
Dec 14, 1:18 PM MST	Winter Weather Advisory	GGW	25 hr
Dec 17, 1:54 PM MST	High Wind Warning	GGW	39 hr
Dec 17, 2:00 PM MST	Winter Weather Advisory	GGW	39 hr
Dec 18, 1:16 PM MST	Cold Weather Advisory	GGW	23 hr
Dec 21, 2:27 AM MST	Winter Weather Advisory	GGW	35 hr
Dec 23, 12:02 AM MST	Dense Fog Advisory	GGW	17 hr
Dec 26, 12:23 PM MST	Winter Weather Advisory	GGW	21 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	37
Tornado Warning	4
Severe Thunderstorm Watch	8
Mesoscale Discussion	16
Special Weather Statement	45
Winter
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	11
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	2
Cold
Wind Chill Warning	1
Cold Weather Advisory	1
Wind Chill Advisory	6
Wind and dust
High Wind Warning	3
High Wind Watch	2
Lake Wind Advisory	36
Fire
Red Flag Warning	11
Fire Weather Watch	8
Fog and smoke
Dense Fog Advisory	12
Dense Smoke Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2023 2025

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.