Alert archive / Montana / Yellowstone County

Weather alerts in Yellowstone County, Montana, 2022

157 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Yellowstone County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts: 157
Warnings: 33
Watches: 17
Advisories: 22
Busiest month: July51 alerts
Busiest day: July 3, 20228 alerts

Over time

By month

Warning verification

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

Yellowstone County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	19	15	21%	41	88%	34 min
Flash flood warnings	2	1	50%	3	100%	83 min

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Billings, MT: tornado warnings	1	0	100%	0
NWS Billings, MT: severe thunderstorm warnings	119	52	56%	157	65%	29 min
NWS Billings, MT: flash flood warnings	8	3	63%	5	100%	62 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, 12:08 AM MST	Special Weather Statement	BYZ	6 hr
Jan 1, 6:13 AM MST	Special Weather Statement	BYZ	4 hr
Jan 3, 11:33 AM MST	Winter Weather Advisory	BYZ	4 days
Jan 17, 2:15 PM MST	Winter Weather Advisory	BYZ	44 hr
Feb 1, 1:46 PM MST	Winter Weather Advisory	BYZ	43 hr
Feb 2, 10:33 AM MST	Wind Chill Advisory	BYZ	22 hr
Feb 11, 9:35 AM MST	Mesoscale Discussion	SPC	4 hr
Feb 16, 7:31 AM MST	Special Weather Statement	BYZ	119 min
Feb 16, 9:49 AM MST	Special Weather Statement	BYZ	116 min
Feb 18, 2:40 PM MST	Winter Storm Watch	BYZ	4 days
Feb 19, 12:53 AM MST	Special Weather Statement	BYZ	112 min
Feb 19, 2:58 PM MST	Winter Storm Warning	BYZ	48 hr
Feb 21, 2:58 PM MST	Wind Chill Advisory	BYZ	68 hr
Mar 3, 3:57 AM MST	Special Weather Statement	BYZ	3 hr
Mar 3, 7:41 AM MST	Special Weather Statement	BYZ	79 min
Mar 3, 2:16 PM MST	Winter Weather Advisory	BYZ	43 hr
Mar 4, 5:59 AM MST	Special Weather Statement	BYZ	3 hr
Mar 7, 3:10 AM MST	Winter Weather Advisory	BYZ	54 hr
Mar 7, 5:08 PM MST	Mesoscale Discussion	SPC	3 hr
Apr 2, 4:14 PM MDT	Special Weather Statement	BYZ	61 min
Apr 2, 5:17 PM MDT	Special Weather Statement	BYZ	58 min
Apr 3, 1:21 AM MDT	High Wind Watch	BYZ	50 hr
Apr 4, 3:38 AM MDT	High Wind Warning	BYZ	56 hr
Apr 9, 3:14 PM MDT	Winter Storm Watch	BYZ	36 hr
Apr 10, 3:12 PM MDT	Winter Storm Warning	BYZ	59 hr
Apr 16, 9:07 PM MDT	Special Weather Statement	BYZ	23 min
Apr 16, 9:34 PM MDT	Special Weather Statement	BYZ	56 min
Apr 16, 10:33 PM MDT	Special Weather Statement	BYZ	57 min
May 8, 3:10 PM MDT	Special Weather Statement	BYZ	35 min
May 16, 5:54 PM MDT	Special Weather Statement	BYZ	36 min
May 16, 6:34 PM MDT	Special Weather Statement	BYZ	41 min
May 16, 6:49 PM MDT	Special Weather Statement	BYZ	26 min
May 16, 7:17 PM MDT	Special Weather Statement	BYZ	43 min
Jun 3, 6:58 PM MDT	Special Weather Statement	BYZ	32 min
Jun 4, 4:25 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 11, 1:15 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 11, 3:09 PM MDT	Special Weather Statement	BYZ	51 min
Jun 12, 11:06 AM MDT	River Flood Watch	BYZ	24 hr
Jun 13, 10:45 AM MDT	River Flood Warning	BYZ	67 hr
Jun 16, 2:52 AM MDT	Heat Advisory	BYZ	66 hr
Jun 19, 9:39 AM MDT	Special Weather Statement	BYZ	51 min
Jun 19, 12:07 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 8:00 PM MDT	Special Weather Statement	BYZ	45 min
Jun 24, 4:50 PM MDT	Special Weather Statement	BYZ	40 min
Jun 28, 3:45 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 28, 6:16 PM MDT	Mesoscale Discussion	SPC	119 min
Jun 28, 6:57 PM MDT	Special Weather Statement	BYZ	63 min
Jun 28, 11:00 PM MDT	Special Weather Statement	BYZ	30 min
Jun 29, 3:41 PM MDT	Special Weather Statement	BYZ	64 min
Jun 29, 4:56 PM MDT	Special Weather Statement	BYZ	49 min
Jul 1, 8:42 PM MDT	Special Weather Statement	BYZ	63 min
Jul 1, 9:13 PM MDT	Severe Thunderstorm Warning	BYZ	45 min
Jul 2, 6:53 PM MDT	Special Weather Statement	BYZ	37 min
Jul 3, 12:32 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 2:09 PM MDT	Mesoscale Discussion	SPC	96 min
Jul 3, 5:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	60 min
Jul 3, 5:02 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 3, 5:33 PM MDT	Mesoscale Discussion	SPC	87 min
Jul 3, 5:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	53 min
Jul 3, 5:59 PM MDT	Severe Thunderstorm Warning	BYZ	31 min
Jul 3, 6:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	60 min
Jul 4, 7:12 AM MDT	Special Weather Statement	BYZ	48 min
Jul 4, 3:07 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 5, 12:56 AM MDT	Mesoscale Discussion	SPC	2 hr
Jul 5, 1:39 AM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	66 min
Jul 5, 2:41 AM MDT	Severe Thunderstorm Warning	BYZ	64 min
Jul 5, 2:55 AM MDT	Mesoscale Discussion	SPC	65 min
Jul 5, 3:38 AM MDT	Severe Thunderstorm Warning	BYZ	37 min
Jul 5, 3:01 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 2:48 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 4:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 6, 5:24 PM MDT	Special Weather Statement	BYZ	36 min
Jul 6, 6:33 PM MDT	Severe Thunderstorm Warning	BYZ	42 min
Jul 6, 7:01 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 7, 1:41 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 9, 8:59 PM MDT	Severe Thunderstorm Warning	BYZ	31 min
Jul 9, 9:40 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	35 min
Jul 12, 2:11 AM MDT	Heat Advisory	BYZ	42 hr
Jul 13, 3:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	63 min
Jul 13, 4:00 PM MDT	Mesoscale Discussion	SPC	60 min
Jul 14, 1:02 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 15, 12:31 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 15, 3:04 PM MDT	Severe Thunderstorm Warning	BYZ	56 min
Jul 15, 3:50 PM MDT	Special Weather Statement	BYZ	40 min
Jul 15, 4:03 PM MDT	Special Weather Statement	BYZ	42 min
Jul 15, 5:02 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 16, 11:45 AM MDT	Heat Advisory	BYZ	58 hr
Jul 17, 3:04 PM MDT	Special Weather Statement	BYZ	56 min
Jul 17, 3:58 PM MDT	Special Weather Statement	BYZ	62 min
Jul 18, 1:00 AM MDT	Special Weather Statement	BYZ	45 min
Jul 18, 1:43 AM MDT	Special Weather Statement	BYZ	47 min
Jul 18, 11:13 AM MDT	High Wind Warning	BYZ	27 hr
Jul 18, 12:08 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 5:51 PM MDT	Severe Thunderstorm Warning	BYZ	54 min
Jul 24, 6:23 PM MDT	Severe Thunderstorm Warning	BYZ	67 min
Jul 24, 6:40 PM MDT	Flash Flood Warning	BYZ	3 hr
Jul 24, 7:15 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	60 min
Jul 29, 4:29 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 31, 2:22 AM MDT	Heat Advisory	BYZ	42 hr
Jul 31, 3:02 AM MDT	Fire Weather Watch	BYZ	11 hr
Jul 31, 2:29 PM MDT	Red Flag Warning	BYZ	55 hr
Aug 3, 2:12 AM MDT	Red Flag Warning	BYZ	42 hr
Aug 4, 5:05 PM MDT	Special Weather Statement	BYZ	40 min
Aug 4, 6:04 PM MDT	Special Weather Statement	BYZ	56 min
Aug 9, 1:49 PM MDT	Heat Advisory	BYZ	31 hr
Aug 12, 5:01 PM MDT	Special Weather Statement	BYZ	29 min
Aug 12, 5:30 PM MDT	Special Weather Statement	BYZ	60 min
Aug 12, 5:52 PM MDT	Mesoscale Discussion	SPC	83 min
Aug 13, 2:22 PM MDT	Mesoscale Discussion	SPC	83 min
Aug 13, 4:37 PM MDT	Special Weather Statement	BYZ	53 min
Aug 13, 5:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BYZ	51 min
Aug 22, 7:23 PM MDT	Flash Flood Warning	BYZ	80 min
Aug 26, 1:48 PM MDT	Special Weather Statement	BYZ	42 min
Aug 27, 2:39 PM MDT	Special Weather Statement	BYZ	81 min
Aug 27, 3:28 PM MDT	Mesoscale Discussion	SPC	92 min
Aug 27, 4:33 PM MDT	Special Weather Statement	BYZ	42 min
Aug 27, 5:33 PM MDT	Special Weather Statement	BYZ	27 min
Sep 2, 12:42 PM MDT	Fire Weather Watch	BYZ	13 hr
Sep 3, 2:11 AM MDT	Red Flag Warning	BYZ	43 hr
Sep 3, 2:27 AM MDT	Heat Advisory	BYZ	18 hr
Sep 5, 2:02 PM MDT	Heat Advisory	BYZ	53 hr
Sep 5, 2:46 PM MDT	Fire Weather Watch	BYZ	11 hr
Sep 6, 2:05 AM MDT	Red Flag Warning	BYZ	46 hr
Sep 7, 4:02 PM MDT	Severe Thunderstorm Warning	BYZ	28 min
Sep 7, 4:28 PM MDT	Severe Thunderstorm Warning	BYZ	62 min
Sep 7, 9:13 PM MDT	Special Weather Statement	BYZ	62 min
Sep 8, 10:53 AM MDT	Special Weather Statement	BYZ	52 min
Sep 18, 8:16 PM MDT	Special Weather Statement	BYZ	29 min
Sep 18, 8:39 PM MDT	Special Weather Statement	BYZ	36 min
Sep 18, 9:04 PM MDT	Special Weather Statement	BYZ	26 min
Sep 18, 9:27 PM MDT	Special Weather Statement	BYZ	48 min
Sep 22, 1:37 PM MDT	Mesoscale Discussion	SPC	113 min
Sep 22, 1:51 PM MDT	Special Weather Statement	BYZ	24 min
Sep 22, 2:29 PM MDT	Special Weather Statement	BYZ	31 min
Sep 22, 3:03 PM MDT	Special Weather Statement	BYZ	27 min
Sep 22, 3:46 PM MDT	Special Weather Statement	BYZ	44 min
Sep 22, 4:30 PM MDT	Special Weather Statement	BYZ	45 min
Oct 11, 3:57 AM MDT	Special Weather Statement	BYZ	63 min
Oct 19, 1:29 AM MDT	Fire Weather Watch	BYZ	12 hr
Oct 19, 1:14 PM MDT	Red Flag Warning	BYZ	32 hr
Nov 3, 1:54 PM MDT	High Wind Watch	BYZ	36 hr
Nov 4, 1:42 AM MDT	High Wind Warning	BYZ	46 hr
Nov 7, 12:53 AM MST	Winter Weather Advisory	BYZ	4 days
Nov 15, 1:20 PM MST	Winter Weather Advisory	BYZ	52 hr
Nov 26, 8:15 PM MST	Special Weather Statement	BYZ	3 hr
Nov 26, 11:53 PM MST	Special Weather Statement	BYZ	22 min
Nov 30, 1:46 PM MST	Winter Weather Advisory	BYZ	45 hr
Dec 3, 1:57 PM MST	Winter Weather Advisory	BYZ	49 hr
Dec 5, 3:00 PM MST	Winter Weather Advisory	BYZ	44 hr
Dec 9, 1:30 PM MST	Winter Storm Watch	BYZ	62 hr
Dec 11, 2:11 AM MST	Winter Weather Advisory	BYZ	49 hr
Dec 14, 5:26 PM MST	Special Weather Statement	BYZ	19 min
Dec 14, 5:58 PM MST	Special Weather Statement	BYZ	62 min
Dec 18, 1:07 AM MST	Wind Chill Advisory	BYZ	61 hr
Dec 20, 1:06 AM MST	Winter Weather Advisory	BYZ	64 hr
Dec 20, 2:22 PM MST	Wind Chill Warning	BYZ	70 hr
Dec 27, 6:27 PM MST	Special Weather Statement	BYZ	93 min

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	19
Severe Thunderstorm Watch	7
Mesoscale Discussion	22
Special Weather Statement	63
Flooding
Flash Flood Warning	2
River Flood Warning	1
River Flood Watch	1
Winter
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	12
Heat
Heat Advisory	7
Cold
Wind Chill Warning	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	3
High Wind Watch	2
Fire
Red Flag Warning	5
Fire Weather Watch	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 2021 2023

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.