Weather alerts in Carter County, Montana, 2025

188 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Carter County and its neighbors

Each county as a circle sized by its count in 2025. Tap one for its archive.

Alerts: 188
Warnings: 62
Watches: 19
Advisories: 29
Busiest month: July64 alerts
Busiest day: July 21, 202512 alerts

Over time

By month

Warning verification

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

Carter County, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	53	16	70%	11	82%	41 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2025

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Billings, MT: tornado warnings	4	1	75%	1	100%	2 min
NWS Billings, MT: severe thunderstorm warnings	260	77	70%	213	67%	27 min
NWS Billings, MT: flash flood warnings	20	0	100%	3	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, 1:09 AM MST	Winter Weather Advisory	BYZ	3 days
Jan 2, 1:42 PM MST	Winter Storm Watch	BYZ	25 hr
Jan 8, 3:13 AM MST	Winter Weather Advisory	BYZ	24 hr
Jan 9, 1:14 PM MST	Winter Storm Watch	BYZ	26 hr
Jan 10, 3:06 PM MST	Winter Weather Advisory	BYZ	52 hr
Jan 18, 1:28 AM MST	Cold Weather Advisory	BYZ	3 days
Jan 19, 1:40 PM MST	Cold Weather Advisory	BYZ	38 hr
Jan 19, 1:40 PM MST	Extreme Cold Warning	BYZ	22 hr
Jan 21, 2:17 AM MST	Winter Weather Advisory	BYZ	51 hr
Feb 2, 3:14 AM MST	Winter Weather Advisory	BYZ	41 hr
Feb 2, 8:31 PM MST	Cold Weather Advisory	BYZ	38 hr
Feb 6, 1:54 AM MST	Winter Weather Advisory	BYZ	46 hr
Feb 10, 1:25 AM MST	Cold Weather Advisory	BYZ	34 hr
Feb 11, 2:48 PM MST	Cold Weather Advisory	BYZ	21 hr
Feb 12, 2:10 PM MST	Cold Weather Advisory	BYZ	20 hr
Feb 15, 1:53 PM MST	Cold Weather Advisory	BYZ	22 hr
Feb 16, 1:50 PM MST	Extreme Cold Warning	BYZ	69 hr
Feb 19, 11:14 AM MST	Cold Weather Advisory	BYZ	25 hr
Mar 9, 2:18 PM MDT	Red Flag Warning	BYZ	29 hr
Mar 15, 2:54 PM MDT	Winter Storm Warning	BYZ	3 days
Mar 17, 3:49 AM MDT	Winter Weather Advisory	BYZ	40 hr
Apr 1, 5:36 AM MDT	Special Weather Statement	BYZ	4 hr
Apr 3, 2:49 AM MDT	Winter Weather Advisory	BYZ	27 hr
Apr 3, 5:46 PM MDT	Special Weather Statement	BYZ	59 min
Apr 12, 7:28 PM MDT	Special Weather Statement	BYZ	47 min
Apr 13, 2:29 AM MDT	High Wind Warning	BYZ	16 hr
Apr 24, 3:53 AM MDT	Winter Weather Advisory	BYZ	12 hr
Apr 27, 5:34 AM MDT	Dense Fog Advisory	BYZ	4 hr
Apr 27, 4:17 PM MDT	Mesoscale Discussion	SPC	88 min
Apr 27, 4:34 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 27, 6:53 PM MDT	Severe Thunderstorm Warning	BYZ	52 min
Apr 27, 7:44 PM MDT	Severe Thunderstorm Warning	BYZ	61 min
Apr 27, 8:30 PM MDT	Mesoscale Discussion	SPC	90 min
Apr 27, 8:40 PM MDT	Severe Thunderstorm Warning	BYZ	80 min
Apr 27, 9:56 PM MDT	Severe Thunderstorm Warning	BYZ	64 min
Apr 27, 10:59 PM MDT	Areal Flood Advisory	BYZ	5 hr
Apr 27, 11:01 PM MDT	Special Weather Statement	BYZ	59 min
May 11, 3:57 PM MDT	Mesoscale Discussion	SPC	2 hr
May 11, 4:28 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 16, 2:16 AM MDT	High Wind Warning	BYZ	11 hr
May 24, 12:22 AM MDT	Dense Fog Advisory	BYZ	9 hr
Jun 13, 1:03 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 13, 7:04 PM MDT	Severe Thunderstorm Warning	BYZ	56 min
Jun 13, 7:58 PM MDT	Severe Thunderstorm Warning	BYZ	32 min
Jun 13, 8:53 PM MDT	Mesoscale Discussion	SPC	97 min
Jun 13, 9:05 PM MDT	Severe Thunderstorm Warning	BYZ	40 min
Jun 13, 9:17 PM MDT	Severe Thunderstorm Warning	BYZ	35 min
Jun 13, 9:28 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jun 13, 9:41 PM MDT	Severe Thunderstorm Warning	BYZ	49 min
Jun 13, 10:24 PM MDT	Severe Thunderstorm Warning	BYZ	75 min
Jun 13, 11:39 PM MDT	Special Weather Statement	BYZ	51 min
Jun 14, 8:22 PM MDT	Severe Thunderstorm Warning	BYZ	39 min
Jun 14, 9:14 PM MDT	Special Weather Statement	BYZ	46 min
Jun 14, 11:11 PM MDT	Special Weather Statement	BYZ	34 min
Jun 14, 11:25 PM MDT	Severe Thunderstorm Warning	BYZ	26 min
Jun 15, 1:13 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 2:15 PM MDT	Severe Thunderstorm Watch	SPC	11 hr
Jun 15, 4:53 PM MDT	Mesoscale Discussion	SPC	97 min
Jun 15, 9:47 PM MDT	Severe Thunderstorm Warning	BYZ	58 min
Jun 15, 10:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	31 min
Jun 15, 10:44 PM MDT	Severe Thunderstorm Warning	BYZ	46 min
Jun 15, 10:58 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jun 15, 11:17 PM MDT	Flash Flood Warning	BYZ	3 hr
Jun 16, 4:52 PM MDT	Mesoscale Discussion	SPC	113 min
Jun 20, 2:24 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 2:46 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 20, 4:01 PM MDT	Severe Thunderstorm Warning	BYZ	59 min
Jun 20, 4:52 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	53 min
Jun 20, 5:14 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 24, 11:12 PM MDT	Special Weather Statement	BYZ	48 min
Jun 25, 3:17 PM MDT	Special Weather Statement	BYZ	28 min
Jun 25, 3:21 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 25, 3:44 PM MDT	Special Weather Statement	BYZ	31 min
Jun 25, 4:02 PM MDT	Severe Thunderstorm Warning	BYZ	58 min
Jun 25, 4:57 PM MDT	Severe Thunderstorm Warning	BYZ	63 min
Jun 26, 6:34 PM MDT	Special Weather Statement	BYZ	41 min
Jun 26, 6:43 PM MDT	Severe Thunderstorm Warning	BYZ	37 min
Jun 26, 11:14 PM MDT	Special Weather Statement	BYZ	46 min
Jun 27, 12:02 AM MDT	Special Weather Statement	BYZ	28 min
Jun 27, 5:27 PM MDT	Special Weather Statement	BYZ	33 min
Jun 28, 2:23 PM MDT	Severe Thunderstorm Warning	BYZ	52 min
Jun 28, 9:29 PM MDT	Severe Thunderstorm Warning	BYZ	76 min
Jun 28, 10:46 PM MDT	Special Weather Statement	BYZ	44 min
Jun 28, 11:05 PM MDT	Severe Thunderstorm Warning	BYZ	40 min
Jul 1, 4:18 PM MDT	Special Weather Statement	BYZ	57 min
Jul 1, 4:24 PM MDT	Severe Thunderstorm Warning	BYZ	51 min
Jul 1, 6:01 PM MDT	Special Weather Statement	BYZ	44 min
Jul 3, 12:15 AM MDT	Special Weather Statement	BYZ	45 min
Jul 3, 2:35 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 3, 7:37 PM MDT	Special Weather Statement	BYZ	53 min
Jul 5, 12:51 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 5, 2:14 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 3:56 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 5:16 PM MDT	Severe Thunderstorm Warning	BYZ	59 min
Jul 5, 6:13 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jul 5, 7:14 PM MDT	Severe Thunderstorm Warning	BYZ	28 min
Jul 6, 8:39 PM MDT	Special Weather Statement	BYZ	51 min
Jul 8, 1:27 AM MDT	Heat Advisory	BYZ	44 hr
Jul 9, 8:23 PM MDT	Special Weather Statement	BYZ	52 min
Jul 17, 10:41 PM MDT	Mesoscale Discussion	SPC	94 min
Jul 18, 12:01 AM MDT	Mesoscale Discussion	SPC	89 min
Jul 18, 12:55 AM MDT	Special Weather Statement	BYZ	65 min
Jul 19, 2:46 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 19, 4:10 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 19, 4:24 PM MDT	Severe Thunderstorm Warning	BYZ	66 min
Jul 19, 5:03 PM MDT	Severe Thunderstorm Warning	BYZ	27 min
Jul 19, 5:29 PM MDT	Severe Thunderstorm Warning	BYZ	61 min
Jul 19, 6:30 PM MDT	Special Weather Statement	BYZ	60 min
Jul 19, 8:11 PM MDT	Mesoscale Discussion	SPC	64 min
Jul 19, 8:12 PM MDT	Severe Thunderstorm Warning	BYZ	63 min
Jul 19, 9:14 PM MDT	Severe Thunderstorm Warning	BYZ	44 min
Jul 20, 3:45 PM MDT	Mesoscale Discussion	SPC	90 min
Jul 20, 4:09 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 6:31 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	48 min
Jul 20, 6:55 PM MDT	Mesoscale Discussion	SPC	95 min
Jul 20, 7:17 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	58 min
Jul 20, 8:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	33 min
Jul 20, 8:42 PM MDT	Severe Thunderstorm Warning	BYZ	33 min
Jul 20, 9:28 PM MDT	Special Weather Statement	BYZ	47 min
Jul 20, 9:51 PM MDT	Severe Thunderstorm Warning	BYZ	54 min
Jul 20, 9:58 PM MDT	Mesoscale Discussion	SPC	92 min
Jul 20, 10:44 PM MDT	Special Weather Statement	BYZ	31 min
Jul 21, 1:59 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 3:34 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 21, 5:56 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 10:39 PM MDT	Special Weather Statement	BYZ	51 min
Jul 22, 2:00 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 4:57 PM MDT	Special Weather Statement	BYZ	63 min
Jul 23, 6:03 PM MDT	Special Weather Statement	BYZ	42 min
Jul 25, 3:47 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 26, 4:34 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 26, 6:52 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 26, 7:07 PM MDT	Special Weather Statement	BYZ	23 min
Jul 26, 7:41 PM MDT	Severe Thunderstorm Warning	BYZ	49 min
Jul 26, 8:13 PM MDT	Severe Thunderstorm Warning	BYZ	28 min
Jul 26, 8:30 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 26, 10:14 PM MDT	Special Weather Statement	BYZ	46 min
Jul 27, 2:23 AM MDT	Special Weather Statement	BYZ	37 min
Jul 29, 2:28 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 29, 5:22 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 5:54 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	66 min
Jul 29, 6:50 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	55 min
Jul 29, 7:36 PM MDT	Severe Thunderstorm Warning	BYZ	39 min
Jul 29, 7:39 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	66 min
Jul 29, 8:05 PM MDT	Severe Thunderstorm Warning	BYZ	24 min
Jul 29, 8:16 PM MDT	Special Weather Statement	BYZ	29 min
Jul 29, 8:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	39 min
Jul 30, 2:40 AM MDT	Flood Watch	BYZ	20 hr
Jul 31, 11:34 PM MDT	Special Weather Statement	BYZ	41 min
Aug 1, 10:14 PM MDT	Special Weather Statement	BYZ	46 min
Aug 1, 11:14 PM MDT	Special Weather Statement	BYZ	31 min
Aug 4, 2:38 PM MDT	Mesoscale Discussion	SPC	97 min
Aug 5, 1:53 AM MDT	Severe Thunderstorm Warning	BYZ	67 min
Aug 5, 1:58 AM MDT	Mesoscale Discussion	SPC	92 min
Aug 5, 2:58 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	41 min
Aug 5, 3:22 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	38 min
Aug 6, 4:25 PM MDT	Mesoscale Discussion	SPC	95 min
Aug 7, 3:50 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 7, 6:28 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 9:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	47 min
Aug 7, 10:10 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	22 min
Aug 18, 1:37 PM MDT	Heat Advisory	BYZ	55 hr
Sep 1, 5:15 AM MDT	Special Weather Statement	BYZ	3 hr
Sep 10, 8:37 PM MDT	Severe Thunderstorm Warning	BYZ	38 min
Sep 10, 9:17 PM MDT	Special Weather Statement	BYZ	43 min
Sep 10, 10:44 PM MDT	Special Weather Statement	BYZ	61 min
Sep 10, 10:50 PM MDT	Special Weather Statement	UNR	40 min
Sep 11, 12:19 AM MDT	Special Weather Statement	BYZ	56 min
Sep 11, 10:38 PM MDT	Special Weather Statement	BYZ	52 min
Sep 11, 11:38 PM MDT	Special Weather Statement	BYZ	52 min
Sep 12, 1:32 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 12, 5:01 PM MDT	Mesoscale Discussion	SPC	2 hr
Sep 12, 9:33 PM MDT	Special Weather Statement	BYZ	42 min
Sep 15, 7:03 PM MDT	Special Weather Statement	BYZ	57 min
Sep 15, 8:00 PM MDT	Special Weather Statement	BYZ	45 min
Oct 14, 11:59 PM MDT	Dense Fog Advisory	BYZ	9 hr
Oct 19, 12:10 PM MDT	High Wind Watch	BYZ	14 hr
Nov 24, 1:48 AM MST	Winter Weather Advisory	BYZ	33 hr
Nov 27, 1:07 PM MST	Winter Weather Advisory	BYZ	43 hr
Dec 1, 2:17 PM MST	Winter Weather Advisory	BYZ	42 hr
Dec 7, 1:17 AM MST	High Wind Watch	BYZ	36 hr
Dec 8, 1:10 AM MST	High Wind Warning	BYZ	38 hr
Dec 8, 2:08 PM MST	Winter Weather Advisory	BYZ	58 hr
Dec 9, 4:18 PM MST	Winter Storm Watch	BYZ	46 hr
Dec 11, 2:22 AM MST	Winter Weather Advisory	BYZ	54 hr
Dec 16, 3:05 AM MST	High Wind Watch	BYZ	11 hr
Dec 16, 1:43 PM MST	High Wind Warning	BYZ	39 hr
Dec 27, 12:51 AM MST	Cold Weather Advisory	BYZ	37 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	53
Severe Thunderstorm Watch	12
Mesoscale Discussion	33
Special Weather Statement	45
Flooding
Flash Flood Warning	1
Flood Watch	1
Areal Flood Advisory	1
Winter
Winter Storm Warning	1
Winter Storm Watch	3
Winter Weather Advisory	14
Heat
Heat Advisory	2
Cold
Extreme Cold Warning	2
Cold Weather Advisory	9
Wind and dust
High Wind Warning	4
High Wind Watch	3
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2024 2026

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.