Alert archive / Montana / Missoula County

Weather alerts in Missoula County, Montana, 2021

161 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Missoula County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 161
Warnings: 23
Watches: 13
Advisories: 82
Busiest month: December33 alerts
Busiest day: July 21, 20218 alerts

Over time

By month

Warning verification

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

Missoula County, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	6	6	0%	17	41%	9 min
Flash flood warnings	0			0

Each office's whole area, 2021

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Missoula, MT: severe thunderstorm warnings	14	6	57%	26	42%	11 min
NWS Missoula, MT: flash flood warnings	3	1	67%	6	33%	73 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, 3:00 PM MST	Winter Storm Watch	MSO	12 hr
Jan 2, 3:16 AM MST	Winter Storm Warning	MSO	33 hr
Jan 2, 1:37 PM MST	Wind Advisory	MSO	27 hr
Jan 2, 1:58 PM MST	Winter Weather Advisory	MSO	23 hr
Jan 4, 2:39 AM MST	Winter Weather Advisory	MSO	30 hr
Jan 11, 2:39 PM MST	High Wind Watch	MSO	21 hr
Jan 11, 2:39 PM MST	Winter Weather Advisory	MSO	23 hr
Jan 12, 12:03 PM MST	High Wind Warning	MSO	32 hr
Jan 12, 12:03 PM MST	Wind Advisory	MSO	32 hr
Jan 15, 12:50 PM MST	Winter Weather Advisory	MSO	10 hr
Jan 16, 6:15 AM MST	Dense Fog Advisory	MSO	5 hr
Jan 16, 1:14 PM MST	Winter Weather Advisory	MSO	39 hr
Jan 21, 7:52 PM MST	Special Weather Statement	MSO	38 min
Jan 21, 9:36 PM MST	Special Weather Statement	MSO	39 min
Jan 22, 8:55 AM MST	Special Weather Statement	MSO	65 min
Feb 2, 9:27 AM MST	Winter Weather Advisory	MSO	20 hr
Feb 3, 3:24 PM MST	Special Weather Statement	MSO	36 min
Feb 3, 4:40 PM MST	Special Weather Statement	MSO	50 min
Feb 3, 5:14 PM MST	Winter Weather Advisory	MSO	3 hr
Feb 3, 5:36 PM MST	Special Weather Statement	MSO	24 min
Feb 3, 6:27 PM MST	Special Weather Statement	MSO	48 min
Feb 4, 11:07 AM MST	Winter Weather Advisory	MSO	26 hr
Feb 4, 1:34 PM MST	Winter Storm Watch	MSO	25 hr
Feb 5, 2:59 PM MST	Winter Storm Watch	MSO	23 hr
Feb 5, 2:59 PM MST	Winter Storm Warning	MSO	50 hr
Feb 5, 2:59 PM MST	Winter Weather Advisory	MSO	68 hr
Feb 7, 10:58 AM MST	Winter Weather Advisory	MSO	24 hr
Feb 8, 7:47 AM MST	Wind Chill Advisory	MSO	27 hr
Feb 8, 4:40 PM MST	Winter Weather Advisory	MSO	16 hr
Feb 10, 8:14 AM MST	Wind Chill Warning	MSO	3 days
Feb 10, 8:14 AM MST	Wind Chill Advisory	MSO	3 days
Feb 11, 3:31 AM MST	Winter Weather Advisory	MSO	61 hr
Feb 11, 6:03 AM MST	Winter Weather Advisory	MSO	5 hr
Feb 13, 10:58 AM MST	Wind Chill Advisory	MSO	25 hr
Feb 14, 2:31 PM MST	Winter Weather Advisory	MSO	3 days
Feb 15, 7:29 AM MST	Winter Storm Warning	MSO	49 hr
Feb 15, 12:51 PM MST	Winter Weather Advisory	MSO	23 hr
Feb 17, 6:58 PM MST	Special Weather Statement	MSO	47 min
Feb 18, 3:06 AM MST	Winter Weather Advisory	MSO	35 hr
Feb 21, 8:20 AM MST	Winter Weather Advisory	MSO	71 hr
Feb 23, 8:08 AM MST	Winter Weather Advisory	MSO	23 hr
Feb 23, 5:41 PM MST	Winter Weather Advisory	MSO	14 hr
Feb 24, 11:07 AM MST	Winter Weather Advisory	MSO	72 hr
Feb 26, 4:31 PM MST	Special Weather Statement	MSO	59 min
Feb 27, 11:58 AM MST	Special Weather Statement	MSO	47 min
Mar 7, 1:51 PM MST	Winter Weather Advisory	MSO	45 hr
Mar 21, 7:08 AM MDT	Special Weather Statement	MSO	37 min
Mar 24, 1:52 PM MDT	Winter Weather Advisory	MSO	19 hr
Mar 26, 1:49 PM MDT	High Wind Watch	MSO	24 hr
Mar 27, 1:58 PM MDT	High Wind Warning	MSO	43 hr
Mar 28, 11:03 AM MDT	Winter Weather Advisory	MSO	24 hr
Apr 4, 1:17 PM MDT	Winter Weather Advisory	MSO	29 hr
Apr 7, 12:10 PM MDT	Winter Weather Advisory	MSO	22 hr
Apr 9, 11:53 AM MDT	Wind Advisory	MSO	36 hr
Apr 18, 11:40 AM MDT	Winter Weather Advisory	MSO	23 hr
May 18, 2:37 PM MDT	Winter Weather Advisory	MSO	67 hr
May 22, 2:13 PM MDT	Winter Weather Advisory	MSO	22 hr
May 25, 10:56 AM MDT	River Flood Warning	MSO	4 days
May 28, 2:12 PM MDT	River Flood Advisory	MSO	10 days
Jun 1, 1:55 PM MDT	Heat Advisory	MSO	55 hr
Jun 3, 3:03 PM MDT	Special Weather Statement	MSO	27 min
Jun 3, 3:33 PM MDT	Special Weather Statement	MSO	42 min
Jun 3, 4:58 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 9, 2:13 PM MDT	Winter Weather Advisory	MSO	29 hr
Jun 9, 4:43 PM MDT	Mesoscale Discussion	SPC	92 min
Jun 9, 5:24 PM MDT	Special Weather Statement	MSO	36 min
Jun 9, 6:02 PM MDT	Special Weather Statement	MSO	28 min
Jun 9, 6:30 PM MDT	Special Weather Statement	MSO	30 min
Jun 13, 7:21 PM MDT	Special Weather Statement	MSO	39 min
Jun 14, 8:31 PM MDT	Special Weather Statement	MSO	44 min
Jun 22, 2:25 PM MDT	Excessive Heat Watch	MSO	48 hr
Jun 24, 2:14 PM MDT	Excessive Heat Warning	MSO	7 days
Jun 24, 2:14 PM MDT	Heat Advisory	MSO	7 days
Jul 1, 5:21 PM MDT	Special Weather Statement	MSO	24 min
Jul 1, 5:42 PM MDT	Special Weather Statement	MSO	48 min
Jul 1, 5:56 PM MDT	Severe Thunderstorm Warning	MSO	34 min
Jul 9, 10:11 AM MDT	Fire Weather Watch	MSO	28 hr
Jul 10, 2:09 PM MDT	Red Flag Warning	MSO	31 hr
Jul 13, 2:57 PM MDT	Special Weather Statement	MSO	48 min
Jul 13, 3:52 PM MDT	Special Weather Statement	MSO	23 min
Jul 14, 1:08 PM MDT	Red Flag Warning	MSO	32 hr
Jul 18, 1:04 PM MDT	Red Flag Warning	MSO	35 hr
Jul 20, 1:19 PM MDT	Fire Weather Watch	MSO	23 hr
Jul 20, 3:14 PM MDT	Special Weather Statement	MSO	46 min
Jul 20, 3:24 PM MDT	Special Weather Statement	MSO	51 min
Jul 20, 3:25 PM MDT	Areal Flood Advisory	MSO	56 min
Jul 21, 12:17 PM MDT	Red Flag Warning	MSO	33 hr
Jul 21, 2:40 PM MDT	Mesoscale Discussion	SPC	95 min
Jul 21, 4:53 PM MDT	Special Weather Statement	MSO	37 min
Jul 21, 5:06 PM MDT	Special Weather Statement	MSO	24 min
Jul 21, 5:12 PM MDT	Severe Thunderstorm Warning	MSO	19 min
Jul 21, 5:33 PM MDT	Special Weather Statement	MSO	27 min
Jul 21, 5:36 PM MDT	Severe Thunderstorm Warning	MSO	24 min
Jul 21, 5:44 PM MDT	Special Weather Statement	MSO	16 min
Jul 21, 6:01 PM MDT	Severe Thunderstorm Warning	MSO	29 min
Jul 21, 6:54 PM MDT	Severe Thunderstorm Warning	MSO	36 min
Jul 21, 7:30 PM MDT	Severe Thunderstorm Warning	MSO	30 min
Jul 27, 7:31 PM MDT	Special Weather Statement	MSO	44 min
Jul 29, 2:58 PM MDT	Heat Advisory	MSO	54 hr
Jul 30, 2:07 PM MDT	Flash Flood Watch	MSO	55 hr
Aug 1, 8:16 AM MDT	Wind Advisory	MSO	15 hr
Aug 1, 2:45 PM MDT	Areal Flood Advisory	MSO	3 hr
Aug 1, 3:48 PM MDT	Special Weather Statement	MSO	42 min
Aug 1, 5:00 PM MDT	Special Weather Statement	MSO	30 min
Aug 4, 1:21 PM MDT	Red Flag Warning	MSO	35 hr
Aug 20, 2:48 PM MDT	Special Weather Statement	MSO	42 min
Aug 23, 1:21 PM MDT	Frost Advisory	MSO	20 hr
Sep 16, 7:41 PM MDT	Frost Advisory	MSO	13 hr
Sep 17, 2:16 PM MDT	Wind Advisory	MSO	31 hr
Oct 9, 1:57 PM MDT	Winter Weather Advisory	MSO	63 hr
Oct 26, 10:54 AM MDT	Wind Advisory	MSO	30 hr
Oct 26, 10:54 AM MDT	Winter Weather Advisory	MSO	22 hr
Nov 2, 7:42 AM MDT	Winter Weather Advisory	MSO	2 hr
Nov 4, 3:20 AM MDT	Dense Fog Advisory	MSO	6 hr
Nov 6, 1:33 PM MDT	Winter Weather Advisory	MSO	19 hr
Nov 8, 2:26 PM MST	Winter Weather Advisory	MSO	23 hr
Nov 9, 2:23 PM MST	Winter Weather Advisory	MSO	19 hr
Nov 10, 9:28 AM MST	Special Weather Statement	MSO	92 min
Nov 11, 6:58 AM MST	Winter Weather Advisory	MSO	5 hr
Nov 11, 2:28 PM MST	Winter Weather Advisory	MSO	20 hr
Nov 14, 1:12 PM MST	High Wind Watch	MSO	13 hr
Nov 15, 2:15 AM MST	High Wind Warning	MSO	30 hr
Nov 16, 4:40 PM MST	Special Weather Statement	MSO	50 min
Nov 16, 5:22 PM MST	Winter Weather Advisory	MSO	27 min
Nov 16, 5:49 PM MST	Winter Weather Advisory	MSO	4 hr
Nov 18, 3:06 PM MST	Winter Weather Advisory	MSO	36 hr
Nov 20, 7:18 AM MST	Dense Fog Advisory	MSO	4 hr
Nov 21, 2:34 PM MST	Winter Weather Advisory	MSO	60 hr
Dec 3, 1:25 PM MST	Winter Weather Advisory	MSO	46 hr
Dec 3, 1:29 PM MST	Wind Advisory	MSO	30 hr
Dec 5, 4:05 AM MST	Special Weather Statement	MSO	25 min
Dec 5, 3:03 PM MST	Winter Weather Advisory	MSO	42 hr
Dec 7, 2:56 PM MST	Winter Weather Advisory	MSO	20 hr
Dec 9, 3:12 AM MST	Winter Weather Advisory	MSO	30 hr
Dec 9, 1:45 PM MST	Winter Storm Watch	MSO	25 hr
Dec 10, 4:52 AM MST	Special Weather Statement	MSO	53 min
Dec 10, 3:01 PM MST	Winter Storm Warning	MSO	53 hr
Dec 10, 3:01 PM MST	Winter Weather Advisory	MSO	65 hr
Dec 11, 1:44 PM MST	Winter Weather Advisory	MSO	42 hr
Dec 13, 8:42 AM MST	Special Weather Statement	MSO	48 min
Dec 13, 1:51 PM MST	Winter Weather Advisory	MSO	32 hr
Dec 14, 11:38 AM MST	Winter Weather Advisory	MSO	9 hr
Dec 14, 4:47 PM MST	Winter Weather Advisory	MSO	4 hr
Dec 15, 2:40 PM MST	Winter Weather Advisory	MSO	44 hr
Dec 17, 1:20 PM MST	Winter Storm Watch	MSO	25 hr
Dec 17, 1:20 PM MST	Winter Storm Warning	MSO	64 hr
Dec 18, 7:44 AM MST	Winter Weather Advisory	MSO	21 hr
Dec 18, 2:38 PM MST	Winter Storm Watch	MSO	5 hr
Dec 18, 2:38 PM MST	Winter Weather Advisory	MSO	59 hr
Dec 20, 7:33 AM MST	Winter Storm Warning	MSO	3 hr
Dec 20, 7:33 AM MST	Winter Weather Advisory	MSO	18 hr
Dec 22, 1:35 AM MST	Winter Weather Advisory	MSO	9 hr
Dec 22, 2:09 AM MST	Dense Fog Advisory	MSO	7 hr
Dec 22, 1:28 PM MST	Winter Weather Advisory	MSO	22 hr
Dec 23, 11:53 AM MST	Winter Weather Advisory	MSO	47 hr
Dec 23, 3:29 PM MST	Special Weather Statement	MSO	61 min
Dec 25, 8:23 AM MST	Special Weather Statement	MSO	52 min
Dec 25, 12:43 PM MST	Winter Weather Advisory	MSO	28 hr
Dec 26, 10:52 AM MST	Special Weather Statement	MSO	38 min
Dec 28, 1:40 PM MST	Winter Weather Advisory	MSO	21 hr
Dec 29, 1:25 PM MST	Winter Weather Advisory	MSO	46 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	6
Mesoscale Discussion	3
Special Weather Statement	40
Flooding
River Flood Warning	1
Flash Flood Watch	1
Areal Flood Advisory	2
River Flood Advisory	1
Winter
Winter Storm Warning	6
Winter Storm Watch	6
Winter Weather Advisory	60
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	3
Cold
Wind Chill Warning	1
Frost Advisory	2
Wind Chill Advisory	3
Wind and dust
High Wind Warning	3
High Wind Watch	3
Wind Advisory	7
Fire
Red Flag Warning	5
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2020 2022

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.