Weather alerts in Carbon County, Wyoming, 2020

173 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Carbon County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 173
Warnings: 83
Watches: 42
Advisories: 36
Busiest month: February34 alerts
Busiest day: June 6, 20208 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Carbon County in 2020 had a tornado report inside them.

Carbon County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	9	7	22%	23	43%	21 min
Flash flood warnings	0			0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Cheyenne, WY: tornado warnings	6	1	83%	6	50%	14 min
NWS Cheyenne, WY: severe thunderstorm warnings	154	76	51%	255	75%	23 min
NWS Cheyenne, WY: flash flood warnings	5	2	60%	3	67%	30 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, 9:24 AM MST	Blizzard Warning	CYS	8 hr
Jan 1, 9:24 AM MST	Winter Weather Advisory	CYS	18 hr
Jan 2, 3:52 AM MST	High Wind Watch	CYS	47 hr
Jan 2, 1:46 PM MST	Blizzard Warning	CYS	30 hr
Jan 2, 2:01 PM MST	High Wind Warning	CYS	60 hr
Jan 3, 7:30 PM MST	Winter Weather Advisory	CYS	18 hr
Jan 5, 2:28 AM MST	High Wind Watch	CYS	11 hr
Jan 5, 2:33 AM MST	Winter Weather Advisory	CYS	39 hr
Jan 5, 1:21 PM MST	High Wind Warning	CYS	56 hr
Jan 7, 3:23 AM MST	High Wind Watch	CYS	23 hr
Jan 8, 2:36 AM MST	High Wind Warning	CYS	24 hr
Jan 9, 1:05 AM MST	Winter Weather Advisory	CYS	24 hr
Jan 10, 1:06 AM MST	Winter Storm Watch	CYS	13 hr
Jan 10, 1:11 AM MST	High Wind Watch	CYS	14 hr
Jan 10, 2:31 PM MST	Winter Storm Warning	CYS	3 days
Jan 10, 2:42 PM MST	High Wind Warning	CYS	25 hr
Jan 11, 1:50 AM MST	Winter Weather Advisory	CYS	63 hr
Jan 13, 1:41 AM MST	High Wind Warning	CYS	31 hr
Jan 14, 4:11 PM MST	Snow Squall Warning	CYS	49 min
Jan 14, 4:58 PM MST	Snow Squall Warning	CYS	32 min
Jan 14, 5:16 PM MST	Snow Squall Warning	CYS	29 min
Jan 15, 7:10 PM MST	High Wind Watch	CYS	18 hr
Jan 16, 1:37 PM MST	High Wind Warning	CYS	55 hr
Jan 16, 1:44 PM MST	Winter Weather Advisory	CYS	36 hr
Jan 17, 9:25 AM MST	Snow Squall Warning	CYS	65 min
Jan 20, 8:21 PM MST	Winter Weather Advisory	CYS	69 hr
Jan 24, 12:39 PM MST	High Wind Watch	CYS	20 hr
Jan 25, 2:26 AM MST	High Wind Warning	CYS	30 hr
Jan 26, 1:09 PM MST	Winter Weather Advisory	CYS	34 hr
Jan 30, 3:47 AM MST	High Wind Warning	CYS	4 hr
Jan 30, 2:32 PM MST	High Wind Watch	CYS	11 hr
Jan 31, 2:01 AM MST	High Wind Warning	CYS	56 hr
Jan 31, 1:39 PM MST	Winter Storm Watch	CYS	37 hr
Feb 1, 2:01 PM MST	Winter Storm Warning	CYS	68 hr
Feb 2, 2:17 AM MST	Winter Weather Advisory	CYS	56 hr
Feb 3, 7:59 AM MST	Blizzard Warning	CYS	19 hr
Feb 3, 1:16 PM MST	Winter Storm Warning	CYS	13 hr
Feb 4, 12:09 PM MST	High Wind Warning	CYS	45 hr
Feb 4, 12:30 PM MST	Winter Storm Watch	CYS	15 hr
Feb 4, 12:30 PM MST	Winter Weather Advisory	CYS	39 hr
Feb 4, 8:09 PM MST	Wind Chill Warning	CYS	12 hr
Feb 5, 3:14 AM MST	Winter Storm Watch	CYS	24 hr
Feb 5, 3:14 AM MST	Winter Storm Warning	CYS	3 days
Feb 6, 3:21 AM MST	Winter Weather Advisory	CYS	62 hr
Feb 7, 6:05 PM MST	Blizzard Warning	CYS	14 hr
Feb 8, 8:14 AM MST	Winter Storm Warning	CYS	3 hr
Feb 8, 4:30 PM MST	Snow Squall Warning	CYS	45 min
Feb 10, 12:38 AM MST	High Wind Warning	CYS	4 hr
Feb 10, 4:39 PM MST	High Wind Watch	CYS	21 hr
Feb 11, 2:28 AM MST	High Wind Warning	CYS	27 hr
Feb 12, 1:39 PM MST	High Wind Watch	CYS	23 hr
Feb 13, 12:53 PM MST	Winter Weather Advisory	CYS	31 hr
Feb 13, 1:02 PM MST	High Wind Warning	CYS	4 days
Feb 14, 2:56 PM MST	Winter Storm Watch	CYS	11 hr
Feb 15, 2:13 AM MST	Winter Storm Warning	CYS	63 hr
Feb 15, 2:06 PM MST	Winter Weather Advisory	CYS	54 hr
Feb 20, 4:14 AM MST	Freezing Fog Advisory	CYS	6 hr
Feb 22, 2:04 PM MST	High Wind Watch	CYS	13 hr
Feb 23, 3:17 AM MST	High Wind Warning	CYS	35 hr
Feb 23, 3:44 AM MST	Winter Weather Advisory	CYS	64 hr
Feb 24, 8:11 AM MST	Blizzard Warning	CYS	3 hr
Feb 26, 1:21 AM MST	High Wind Warning	CYS	26 hr
Feb 28, 1:09 AM MST	High Wind Watch	CYS	19 hr
Feb 28, 1:09 AM MST	High Wind Warning	CYS	32 hr
Feb 28, 1:25 AM MST	Winter Storm Watch	CYS	37 hr
Feb 29, 2:05 AM MST	Winter Storm Warning	CYS	45 hr
Feb 29, 2:05 AM MST	Winter Weather Advisory	CYS	51 hr
Mar 2, 2:23 AM MST	High Wind Warning	CYS	67 hr
Mar 10, 2:47 AM MDT	High Wind Watch	CYS	10 hr
Mar 10, 12:59 PM MDT	High Wind Warning	CYS	41 hr
Mar 12, 2:44 PM MDT	Winter Weather Advisory	CYS	43 hr
Mar 16, 1:57 PM MDT	Winter Storm Watch	CYS	14 hr
Mar 16, 9:56 PM MDT	Freezing Fog Advisory	CYS	14 hr
Mar 17, 4:20 AM MDT	Blizzard Warning	CYS	64 hr
Mar 17, 4:20 AM MDT	Winter Storm Warning	CYS	58 hr
Mar 17, 4:20 AM MDT	Winter Weather Advisory	CYS	4 days
Mar 25, 2:03 PM MDT	Winter Storm Warning	CYS	52 hr
Mar 26, 12:42 PM MDT	Winter Weather Advisory	CYS	48 hr
Apr 1, 3:15 AM MDT	Winter Weather Advisory	CYS	41 hr
Apr 1, 3:13 PM MDT	Winter Storm Warning	CYS	27 hr
Apr 10, 2:44 PM MDT	Winter Weather Advisory	CYS	45 hr
Apr 14, 2:52 AM MDT	Winter Storm Watch	CYS	24 hr
Apr 14, 2:31 PM MDT	Winter Storm Warning	CYS	54 hr
Apr 15, 3:02 AM MDT	Winter Weather Advisory	CYS	39 hr
Apr 22, 1:33 PM MDT	Winter Storm Warning	CYS	45 hr
Apr 22, 1:33 PM MDT	Winter Weather Advisory	CYS	45 hr
Apr 23, 4:42 PM MDT	Special Weather Statement	CYS	48 min
May 1, 12:47 PM MDT	Mesoscale Discussion	SPC	88 min
May 6, 7:39 PM MDT	High Wind Warning	CYS	22 hr
May 31, 12:18 PM MDT	Mesoscale Discussion	SPC	117 min
Jun 6, 12:13 AM MDT	Special Weather Statement	CYS	62 min
Jun 6, 12:27 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 6, 1:23 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 6, 1:28 PM MDT	Severe Thunderstorm Warning	CYS	62 min
Jun 6, 2:09 PM MDT	Severe Thunderstorm Warning	CYS	66 min
Jun 6, 2:29 PM MDT	Severe Thunderstorm Warning	CYS	31 min
Jun 6, 2:53 PM MDT	Severe Thunderstorm Warning	CYS	67 min
Jun 6, 3:02 PM MDT	Tornado Warning	CYS	28 min
Jun 7, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	32 min
Jun 7, 5:10 PM MDT	Severe Thunderstorm Warning	CYS	35 min
Jun 7, 5:28 PM MDT	Severe Thunderstorm Warning	CYS	32 min
Jun 8, 3:36 AM MDT	Winter Weather Advisory	CYS	31 hr
Jun 13, 12:54 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 16, 10:06 AM MDT	High Wind Warning	CYS	8 hr
Jun 25, 1:11 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 2:31 PM MDT	Special Weather Statement	CYS	44 min
Jul 13, 2:26 PM MDT	Severe Thunderstorm Warning	CYS	19 min
Jul 13, 3:16 PM MDT	Severe Thunderstorm Warning	CYS	29 min
Aug 3, 2:12 PM MDT	Mesoscale Discussion	SPC	93 min
Aug 4, 7:59 PM MDT	Special Weather Statement	CYS	46 min
Aug 20, 5:45 PM MDT	Special Weather Statement	CYS	45 min
Aug 30, 2:34 AM MDT	Hard Freeze Watch	CYS	12 hr
Sep 6, 3:22 AM MDT	Winter Storm Watch	CYS	25 hr
Sep 7, 4:09 AM MDT	Winter Storm Warning	CYS	46 hr
Sep 7, 4:09 AM MDT	Winter Weather Advisory	CYS	46 hr
Sep 7, 1:28 PM MDT	Freeze Warning	CYS	43 hr
Sep 7, 8:41 PM MDT	Dense Fog Advisory	CYS	3 hr
Sep 8, 2:34 AM MDT	Mesoscale Discussion	SPC	4 hr
Sep 25, 3:52 AM MDT	High Wind Watch	CYS	10 hr
Sep 25, 2:04 PM MDT	High Wind Warning	CYS	28 hr
Oct 10, 9:03 PM MDT	High Wind Warning	CYS	51 hr
Oct 12, 2:57 PM MDT	High Wind Watch	CYS	23 hr
Oct 13, 4:03 AM MDT	High Wind Warning	CYS	38 hr
Oct 15, 2:08 AM MDT	High Wind Watch	CYS	33 hr
Oct 15, 2:43 PM MDT	High Wind Warning	CYS	51 hr
Oct 17, 2:20 PM MDT	High Wind Watch	CYS	12 hr
Oct 18, 2:48 AM MDT	High Wind Warning	CYS	57 hr
Oct 20, 2:21 PM MDT	High Wind Warning	CYS	28 hr
Oct 23, 2:56 AM MDT	High Wind Warning	CYS	39 hr
Oct 23, 2:54 PM MDT	Winter Storm Watch	CYS	13 hr
Oct 23, 2:54 PM MDT	Winter Weather Advisory	CYS	51 hr
Oct 24, 4:22 AM MDT	Winter Storm Warning	CYS	46 hr
Oct 25, 8:50 PM MDT	Wind Chill Advisory	CYS	12 hr
Oct 26, 2:34 PM MDT	Wind Chill Advisory	CYS	18 hr
Oct 29, 2:22 PM MDT	High Wind Watch	CYS	24 hr
Oct 30, 2:37 AM MDT	High Wind Warning	CYS	28 hr
Nov 5, 10:04 AM MST	High Wind Warning	CYS	23 hr
Nov 6, 1:32 PM MST	High Wind Watch	CYS	14 hr
Nov 7, 3:37 AM MST	High Wind Warning	CYS	31 hr
Nov 8, 2:10 PM MST	High Wind Watch	CYS	13 hr
Nov 9, 3:17 AM MST	High Wind Warning	CYS	44 hr
Nov 11, 2:52 AM MST	High Wind Watch	CYS	17 hr
Nov 11, 4:58 PM MST	Snow Squall Warning	CYS	32 min
Nov 11, 8:10 PM MST	High Wind Warning	CYS	20 hr
Nov 12, 1:21 AM MST	High Wind Watch	CYS	24 hr
Nov 12, 8:18 PM MST	High Wind Warning	CYS	4 days
Nov 13, 1:20 AM MST	Winter Storm Warning	CYS	46 hr
Nov 13, 12:59 PM MST	Winter Weather Advisory	CYS	31 hr
Nov 16, 1:08 PM MST	High Wind Watch	CYS	37 hr
Nov 17, 3:00 AM MST	High Wind Warning	CYS	50 hr
Nov 23, 1:39 AM MST	High Wind Watch	CYS	43 hr
Nov 24, 1:36 AM MST	High Wind Warning	CYS	39 hr
Nov 29, 1:55 AM MST	High Wind Watch	CYS	11 hr
Nov 29, 12:47 PM MST	High Wind Warning	CYS	39 hr
Dec 10, 6:57 PM MST	Dense Fog Advisory	CYS	14 hr
Dec 12, 2:40 AM MST	High Wind Watch	CYS	10 hr
Dec 12, 1:03 PM MST	High Wind Warning	CYS	37 hr
Dec 14, 1:13 PM MST	High Wind Watch	CYS	13 hr
Dec 15, 2:13 AM MST	High Wind Warning	CYS	59 hr
Dec 17, 2:37 AM MST	Winter Weather Advisory	CYS	51 hr
Dec 18, 2:42 AM MST	High Wind Watch	CYS	10 hr
Dec 18, 1:08 PM MST	High Wind Watch	CYS	13 hr
Dec 18, 1:08 PM MST	High Wind Warning	CYS	3 days
Dec 21, 1:31 PM MST	High Wind Warning	CYS	4 days
Dec 22, 5:55 AM MST	Winter Weather Advisory	CYS	27 hr
Dec 22, 1:13 PM MST	High Wind Warning	CYS	21 hr
Dec 25, 3:09 AM MST	High Wind Warning	CYS	35 hr
Dec 26, 12:35 AM MST	Winter Weather Advisory	CYS	40 hr
Dec 27, 1:04 PM MST	Winter Storm Watch	CYS	12 hr
Dec 28, 1:17 AM MST	Winter Storm Warning	CYS	39 hr
Dec 28, 1:17 AM MST	Winter Weather Advisory	CYS	39 hr
Dec 29, 2:26 AM MST	High Wind Watch	CYS	11 hr
Dec 29, 1:44 PM MST	High Wind Warning	CYS	40 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	9
Tornado Warning	1
Severe Thunderstorm Watch	1
Mesoscale Discussion	7
Special Weather Statement	5
Winter
Blizzard Warning	6
Snow Squall Warning	6
Winter Storm Warning	16
Winter Storm Watch	11
Winter Weather Advisory	30
Cold
Freeze Warning	1
Wind Chill Warning	1
Hard Freeze Watch	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	43
High Wind Watch	29
Fog and smoke
Dense Fog Advisory	2
Freezing Fog 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 2019 2021

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.