Weather alerts in Carter County, Montana, 2018

196 weather alerts in 2018, 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 2018. Tap one for its archive.

Alerts: 196
Warnings: 51
Watches: 22
Advisories: 22
Busiest month: June59 alerts
Busiest day: June 29, 201811 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 2 tornado warnings covering Carter County in 2018 had a tornado report inside them; 3 of 4 tornado reports fell inside a warning, on average 23 minutes after it went out.

Carter County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	2	0%	4	75%	23 min
Severe thunderstorm warnings	36	16	56%	19	89%	37 min
Flash flood warnings	2	1	50%	1	100%	85 min

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Billings, MT: tornado warnings	2	2	0%	5	60%	23 min
NWS Billings, MT: severe thunderstorm warnings	176	84	52%	213	73%	23 min
NWS Billings, MT: flash flood warnings	8	6	25%	7	86%	44 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, 9:53 AM MST	Special Weather Statement	BYZ	3 hr
Jan 1, 3:24 PM MST	Wind Chill Advisory	BYZ	18 hr
Jan 9, 4:11 AM MST	Winter Storm Watch	BYZ	11 hr
Jan 9, 2:49 PM MST	Winter Weather Advisory	BYZ	30 hr
Jan 10, 3:08 PM MST	Wind Chill Advisory	BYZ	18 hr
Jan 11, 3:54 AM MST	Winter Weather Advisory	BYZ	41 hr
Jan 13, 12:27 PM MST	Special Weather Statement	BYZ	2 hr
Jan 14, 2:26 AM MST	Wind Chill Advisory	BYZ	57 hr
Jan 14, 1:11 PM MST	Special Weather Statement	BYZ	19 min
Jan 14, 1:15 PM MST	Special Weather Statement	BYZ	15 min
Feb 2, 2:51 PM MST	Winter Weather Advisory	BYZ	13 hr
Feb 3, 4:02 AM MST	Winter Weather Advisory	BYZ	24 hr
Feb 6, 3:39 PM MST	Winter Storm Watch	BYZ	35 hr
Feb 7, 3:33 PM MST	Winter Storm Warning	BYZ	42 hr
Feb 9, 2:55 PM MST	Wind Chill Advisory	BYZ	21 hr
Feb 11, 2:05 PM MST	Wind Chill Advisory	BYZ	22 hr
Feb 14, 2:33 PM MST	Winter Weather Advisory	BYZ	24 hr
Feb 16, 11:55 PM MST	Special Weather Statement	BYZ	95 min
Feb 17, 2:56 AM MST	Winter Weather Advisory	BYZ	66 hr
Mar 2, 3:18 AM MST	Winter Storm Watch	BYZ	48 hr
Mar 3, 3:07 AM MST	Winter Storm Warning	BYZ	3 days
Mar 3, 6:46 AM MST	Dense Fog Advisory	BYZ	4 hr
Mar 3, 2:38 PM MST	Dense Fog Advisory	BYZ	21 hr
Mar 4, 11:58 AM MST	Special Weather Statement	BYZ	3 hr
Mar 10, 9:44 AM MST	Winter Weather Advisory	BYZ	7 hr
Mar 13, 2:56 AM MDT	Dense Fog Advisory	BYZ	7 hr
Mar 14, 2:49 PM MDT	Winter Storm Watch	BYZ	12 hr
Mar 15, 2:37 AM MDT	Winter Storm Warning	BYZ	41 hr
Mar 18, 3:23 AM MDT	Winter Weather Advisory	BYZ	24 hr
Mar 23, 3:13 PM MDT	Winter Storm Watch	BYZ	36 hr
Mar 24, 3:19 AM MDT	Special Weather Statement	BYZ	3 hr
Mar 24, 6:23 AM MDT	Special Weather Statement	BYZ	3 hr
Mar 25, 2:50 AM MDT	Winter Storm Warning	BYZ	35 hr
Mar 31, 2:52 PM MDT	Winter Storm Watch	BYZ	24 hr
Apr 1, 3:30 AM MDT	Winter Storm Warning	BYZ	50 hr
Apr 10, 2:58 PM MDT	Winter Storm Watch	BYZ	36 hr
Apr 11, 3:15 PM MDT	Winter Storm Warning	BYZ	48 hr
Apr 12, 3:18 PM MDT	Areal Flood Warning	BYZ	71 hr
Apr 16, 4:42 PM MDT	High Wind Warning	BYZ	7 hr
Apr 23, 3:20 PM MDT	Winter Weather Advisory	BYZ	15 hr
Apr 29, 12:40 PM MDT	Mesoscale Discussion	SPC	3 hr
Apr 29, 5:06 PM MDT	Mesoscale Discussion	SPC	2 hr
Apr 29, 5:25 PM MDT	Special Weather Statement	BYZ	65 min
May 7, 2:49 PM MDT	Mesoscale Discussion	SPC	116 min
May 8, 8:01 PM MDT	Special Weather Statement	BYZ	59 min
May 8, 9:58 PM MDT	Special Weather Statement	BYZ	32 min
May 14, 3:32 PM MDT	Special Weather Statement	BYZ	43 min
May 14, 4:20 PM MDT	Special Weather Statement	BYZ	40 min
May 16, 4:20 PM MDT	Special Weather Statement	BYZ	40 min
May 16, 5:50 PM MDT	Special Weather Statement	BYZ	40 min
May 16, 6:27 PM MDT	Special Weather Statement	BYZ	48 min
May 17, 12:58 PM MDT	Mesoscale Discussion	SPC	92 min
May 17, 1:23 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
May 17, 4:54 PM MDT	Mesoscale Discussion	SPC	66 min
May 22, 4:56 PM MDT	Mesoscale Discussion	SPC	2 hr
May 22, 5:33 PM MDT	Special Weather Statement	BYZ	42 min
May 22, 6:07 PM MDT	Severe Thunderstorm Warning	BYZ	38 min
May 23, 2:34 PM MDT	Mesoscale Discussion	SPC	116 min
May 23, 5:07 PM MDT	Mesoscale Discussion	SPC	83 min
May 23, 5:54 PM MDT	Special Weather Statement	BYZ	51 min
May 23, 6:14 PM MDT	Severe Thunderstorm Warning	BYZ	61 min
May 27, 4:25 AM MDT	Flood Watch	BYZ	40 hr
May 31, 1:47 PM MDT	Mesoscale Discussion	SPC	118 min
May 31, 1:50 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
May 31, 3:40 PM MDT	Special Weather Statement	BYZ	35 min
May 31, 7:37 PM MDT	Special Weather Statement	BYZ	38 min
May 31, 8:16 PM MDT	Special Weather Statement	BYZ	29 min
May 31, 8:18 PM MDT	Mesoscale Discussion	SPC	57 min
May 31, 8:45 PM MDT	Special Weather Statement	BYZ	45 min
May 31, 8:51 PM MDT	Severe Thunderstorm Warning	BYZ	54 min
Jun 1, 11:03 AM MDT	Mesoscale Discussion	SPC	117 min
Jun 1, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 1, 3:04 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 1, 3:10 PM MDT	Special Weather Statement	BYZ	50 min
Jun 5, 5:45 PM MDT	Special Weather Statement	BYZ	45 min
Jun 5, 5:54 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 5, 5:59 PM MDT	Severe Thunderstorm Warning	BYZ	46 min
Jun 7, 1:51 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 7, 3:49 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 7, 5:16 PM MDT	Mesoscale Discussion	SPC	119 min
Jun 7, 6:21 PM MDT	Special Weather Statement	BYZ	24 min
Jun 7, 6:46 PM MDT	Special Weather Statement	BYZ	29 min
Jun 7, 7:33 PM MDT	Severe Thunderstorm Warning	BYZ	42 min
Jun 7, 8:12 PM MDT	Severe Thunderstorm Warning	BYZ	63 min
Jun 8, 1:39 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 8, 5:20 PM MDT	Special Weather Statement	BYZ	40 min
Jun 8, 6:00 PM MDT	Special Weather Statement	BYZ	45 min
Jun 8, 6:45 PM MDT	Special Weather Statement	BYZ	45 min
Jun 8, 7:13 PM MDT	Severe Thunderstorm Warning	BYZ	47 min
Jun 8, 7:59 PM MDT	Severe Thunderstorm Warning	BYZ	46 min
Jun 8, 8:12 PM MDT	Special Weather Statement	BYZ	48 min
Jun 8, 8:18 PM MDT	Special Weather Statement	BYZ	42 min
Jun 8, 8:44 PM MDT	Severe Thunderstorm Warning	BYZ	46 min
Jun 8, 9:33 PM MDT	Special Weather Statement	BYZ	42 min
Jun 9, 2:50 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 9, 6:31 PM MDT	Special Weather Statement	BYZ	44 min
Jun 9, 6:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 9, 7:18 PM MDT	Special Weather Statement	BYZ	42 min
Jun 9, 8:01 PM MDT	Special Weather Statement	BYZ	44 min
Jun 9, 8:15 PM MDT	Severe Thunderstorm Warning	BYZ	30 min
Jun 10, 1:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 6:44 PM MDT	Special Weather Statement	BYZ	61 min
Jun 15, 7:44 PM MDT	Special Weather Statement	BYZ	31 min
Jun 19, 3:51 AM MDT	Flood Watch	BYZ	35 hr
Jun 21, 10:45 PM MDT	Special Weather Statement	BYZ	60 min
Jun 22, 12:56 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 26, 2:35 PM MDT	Mesoscale Discussion	SPC	85 min
Jun 26, 10:30 PM MDT	Special Weather Statement	BYZ	60 min
Jun 26, 10:40 PM MDT	Severe Thunderstorm Warning	BYZ	35 min
Jun 28, 2:35 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 3:42 PM MDT	Tornado Watch	SPC	7 hr
Jun 28, 5:13 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jun 28, 5:59 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 28, 6:14 PM MDT	Severe Thunderstorm Warning	BYZ	61 min
Jun 28, 6:52 PM MDT	Severe Thunderstorm Warning	BYZ	53 min
Jun 28, 7:06 PM MDT	Severe Thunderstorm Warning	BYZ	39 min
Jun 28, 7:27 PM MDT	Tornado Warning Tornado observed	BYZ	48 min
Jun 28, 8:06 PM MDT	Mesoscale Discussion	SPC	84 min
Jun 28, 8:11 PM MDT	Tornado Warning Tornado observed	BYZ	16 min
Jun 28, 8:25 PM MDT	Severe Thunderstorm Warning	BYZ	65 min
Jun 28, 9:26 PM MDT	Severe Thunderstorm Warning	BYZ	79 min
Jun 29, 1:06 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 29, 2:29 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 29, 3:49 PM MDT	Special Weather Statement	BYZ	41 min
Jul 2, 5:58 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 2, 6:59 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 2, 8:50 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 2, 10:46 PM MDT	Severe Thunderstorm Warning	BYZ	44 min
Jul 2, 11:01 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 2, 11:15 PM MDT	Severe Thunderstorm Warning	BYZ	45 min
Jul 3, 12:02 AM MDT	Severe Thunderstorm Warning	BYZ	43 min
Jul 3, 12:46 AM MDT	Severe Thunderstorm Warning	BYZ	29 min
Jul 3, 2:25 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 4:42 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 6:56 PM MDT	Special Weather Statement	BYZ	34 min
Jul 3, 7:30 PM MDT	Special Weather Statement	BYZ	45 min
Jul 3, 8:14 PM MDT	Special Weather Statement	BYZ	31 min
Jul 3, 8:38 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 7, 7:26 PM MDT	Severe Thunderstorm Warning	BYZ	49 min
Jul 7, 7:55 PM MDT	Mesoscale Discussion	SPC	65 min
Jul 7, 8:11 PM MDT	Severe Thunderstorm Warning	BYZ	64 min
Jul 7, 8:25 PM MDT	Special Weather Statement	BYZ	20 min
Jul 7, 8:52 PM MDT	Special Weather Statement	BYZ	23 min
Jul 10, 9:39 PM MDT	Special Weather Statement	BYZ	51 min
Jul 17, 3:25 AM MDT	Flash Flood Watch	BYZ	18 hr
Jul 17, 12:20 PM MDT	Special Weather Statement	BYZ	40 min
Jul 17, 2:26 PM MDT	Special Weather Statement	BYZ	64 min
Jul 17, 2:46 PM MDT	Severe Thunderstorm Warning	BYZ	44 min
Jul 17, 3:12 PM MDT	Flash Flood Warning	BYZ	4 hr
Jul 17, 3:27 PM MDT	Special Weather Statement	BYZ	48 min
Jul 17, 3:58 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Jul 17, 4:05 PM MDT	Flash Flood Warning	BYZ	4 hr
Jul 17, 5:06 PM MDT	Special Weather Statement	BYZ	39 min
Jul 17, 6:19 PM MDT	Special Weather Statement	BYZ	41 min
Jul 18, 12:04 PM MDT	Special Weather Statement	BYZ	56 min
Jul 21, 1:53 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 21, 3:15 PM MDT	Special Weather Statement	BYZ	30 min
Jul 21, 3:33 PM MDT	Severe Thunderstorm Warning	BYZ	45 min
Jul 21, 3:49 PM MDT	Severe Thunderstorm Warning	BYZ	41 min
Jul 21, 4:11 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 4:14 PM MDT	Special Weather Statement	BYZ	31 min
Jul 21, 4:26 PM MDT	Severe Thunderstorm Warning	BYZ	34 min
Jul 21, 4:34 PM MDT	Severe Thunderstorm Warning	BYZ	56 min
Jul 21, 4:42 PM MDT	Severe Thunderstorm Warning	BYZ	35 min
Jul 21, 5:18 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 21, 5:25 PM MDT	Severe Thunderstorm Warning	BYZ	22 min
Jul 27, 2:35 PM MDT	Special Weather Statement	BYZ	40 min
Jul 27, 2:44 PM MDT	Severe Thunderstorm Warning	BYZ	31 min
Jul 28, 3:47 PM MDT	Special Weather Statement	BYZ	28 min
Jul 28, 4:12 PM MDT	Special Weather Statement	BYZ	33 min
Jul 28, 4:49 PM MDT	Special Weather Statement	BYZ	41 min
Jul 28, 5:26 PM MDT	Special Weather Statement	BYZ	34 min
Jul 29, 1:12 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 1:46 PM MDT	Special Weather Statement	BYZ	44 min
Aug 3, 6:28 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Aug 3, 7:28 PM MDT	Severe Thunderstorm Warning	BYZ	92 min
Aug 3, 9:00 PM MDT	Severe Thunderstorm Warning	BYZ	30 min
Aug 9, 3:51 AM MDT	Excessive Heat Warning	BYZ	4 days
Aug 9, 2:50 PM MDT	Fire Weather Watch	BYZ	37 hr
Aug 11, 3:28 AM MDT	Red Flag Warning	BYZ	42 hr
Aug 23, 5:54 PM MDT	Special Weather Statement	BYZ	51 min
Sep 6, 7:02 PM MDT	Special Weather Statement	BYZ	43 min
Sep 8, 2:02 PM MDT	Special Weather Statement	BYZ	58 min
Sep 8, 3:30 PM MDT	Special Weather Statement	BYZ	60 min
Sep 18, 10:52 PM MDT	Special Weather Statement	BYZ	38 min
Sep 18, 11:17 PM MDT	Severe Thunderstorm Warning	BYZ	58 min
Sep 23, 8:04 AM MDT	Special Weather Statement	BYZ	4 hr
Oct 7, 3:26 AM MDT	Winter Weather Advisory	BYZ	50 hr
Nov 15, 2:33 PM MST	Winter Weather Advisory	BYZ	38 hr
Nov 25, 4:48 AM MST	Special Weather Statement	BYZ	5 hr
Nov 29, 3:13 AM MST	Winter Storm Watch	BYZ	24 hr
Nov 30, 3:33 AM MST	Winter Weather Advisory	BYZ	48 hr
Dec 25, 3:17 AM MST	Winter Weather Advisory	BYZ	38 hr
Dec 29, 1:58 PM MST	Winter Weather Advisory	BYZ	49 hr
Dec 30, 3:01 PM MST	Winter Storm Warning	BYZ	24 hr
Dec 30, 8:48 PM MST	Mesoscale Discussion	SPC	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	36
Tornado Warning	2
Severe Thunderstorm Watch	9
Tornado Watch	1
Mesoscale Discussion	34
Special Weather Statement	67
Flooding
Areal Flood Warning	1
Flash Flood Warning	2
Flash Flood Watch	1
Flood Watch	2
Winter
Winter Storm Warning	7
Winter Storm Watch	8
Winter Weather Advisory	14
Heat
Excessive Heat Warning	1
Cold
Wind Chill Advisory	5
Wind and dust
High Wind Warning	1
Fire
Red Flag Warning	1
Fire Weather Watch	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 2017 2019

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.