Alert archive / Colorado / Larimer County

Weather alerts in Larimer County, Colorado, 2021

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

Larimer County and its neighbors

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

Alerts: 203
Warnings: 72
Watches: 29
Advisories: 78
Busiest month: July65 alerts
Busiest day: July 30, 202115 alerts

Over time

By month

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 5, 5:35 PM MST	Special Weather Statement	BOU	25 min
Jan 11, 8:11 PM MST	High Wind Watch	BOU	30 hr
Jan 13, 1:46 AM MST	High Wind Warning	BOU	63 hr
Jan 19, 2:28 PM MST	High Wind Warning	BOU	27 hr
Feb 2, 3:09 AM MST	Winter Weather Advisory	BOU	53 hr
Feb 4, 2:39 PM MST	Winter Weather Advisory	BOU	38 hr
Feb 6, 3:42 AM MST	Winter Weather Advisory	BOU	37 hr
Feb 6, 3:47 AM MST	High Wind Watch	BOU	8 hr
Feb 6, 11:18 AM MST	High Wind Warning	BOU	30 hr
Feb 8, 2:37 PM MST	Winter Weather Advisory	BOU	44 hr
Feb 11, 4:10 AM MST	Winter Weather Advisory	BOU	49 hr
Feb 11, 1:45 PM MST	Wind Chill Advisory	BOU	4 days
Feb 12, 8:46 PM MST	Winter Weather Advisory	BOU	40 hr
Feb 14, 2:48 PM MST	Wind Chill Warning	BOU	20 hr
Feb 17, 5:20 PM MST	Winter Weather Advisory	BOU	10 hr
Feb 19, 2:08 PM MST	Winter Weather Advisory	BOU	39 hr
Feb 23, 2:35 PM MST	Winter Weather Advisory	BOU	43 hr
Mar 3, 2:40 PM MST	Winter Weather Advisory	BOU	33 hr
Mar 9, 2:40 AM MST	Winter Weather Advisory	BOU	38 hr
Mar 10, 2:40 PM MST	Winter Storm Watch	BOU	48 hr
Mar 11, 2:29 PM MST	Winter Storm Warning	BOU	4 days
Mar 13, 12:22 PM MST	Mesoscale Discussion	SPC	4 hr
Mar 13, 7:15 PM MST	Mesoscale Discussion	SPC	6 hr
Mar 13, 7:39 PM MST	Mesoscale Discussion	SPC	6 hr
Mar 14, 1:55 AM MST	Mesoscale Discussion	SPC	6 hr
Mar 14, 9:21 AM MDT	Mesoscale Discussion	SPC	4 hr
Mar 14, 12:19 PM MDT	Blizzard Warning	BOU	12 hr
Mar 20, 2:11 PM MDT	Winter Storm Warning	BOU	44 hr
Mar 21, 2:43 AM MDT	Winter Weather Advisory	BOU	31 hr
Mar 27, 3:57 AM MDT	Dense Fog Advisory	BOU	4 hr
Mar 28, 2:08 PM MDT	High Wind Watch	BOU	19 hr
Mar 28, 8:44 PM MDT	High Wind Warning	BOU	19 hr
Apr 6, 1:57 PM MDT	Areal Flood Advisory	BOU	93 min
Apr 7, 3:36 AM MDT	Fire Weather Watch	BOU	11 hr
Apr 7, 2:49 PM MDT	Red Flag Warning	BOU	28 hr
Apr 13, 2:55 AM MDT	Winter Weather Advisory	BOU	27 hr
Apr 14, 3:03 PM MDT	Winter Weather Advisory	BOU	45 hr
Apr 18, 4:35 AM MDT	Winter Storm Watch	BOU	9 hr
Apr 18, 1:56 PM MDT	Winter Weather Advisory	BOU	37 hr
Apr 19, 4:26 AM MDT	Winter Storm Warning	BOU	23 hr
Apr 21, 7:03 PM MDT	Winter Weather Advisory	BOU	100 min
Apr 26, 3:10 PM MDT	Winter Storm Watch	BOU	12 hr
Apr 27, 3:16 AM MDT	Winter Storm Warning	BOU	30 hr
May 1, 3:56 AM MDT	Winter Storm Watch	BOU	24 hr
May 2, 3:42 AM MDT	Winter Storm Warning	BOU	34 hr
May 2, 10:14 AM MDT	Mesoscale Discussion	SPC	2 hr
May 2, 2:19 PM MDT	Winter Weather Advisory	BOU	23 hr
May 2, 2:38 PM MDT	Special Weather Statement	CYS	37 min
May 2, 4:07 PM MDT	Flash Flood Warning	BOU	3 hr
May 9, 3:40 AM MDT	Winter Storm Watch	BOU	11 hr
May 9, 2:19 PM MDT	Winter Storm Warning	BOU	52 hr
May 15, 2:21 PM MDT	Special Weather Statement	BOU	24 min
May 15, 2:46 PM MDT	Special Weather Statement	CYS	44 min
May 17, 12:39 PM MDT	Areal Flood Advisory	BOU	81 min
May 19, 11:35 AM MDT	Areal Flood Advisory	BOU	85 min
May 19, 12:43 PM MDT	Areal Flood Advisory	BOU	69 min
May 19, 1:18 PM MDT	Areal Flood Advisory	BOU	87 min
May 29, 3:39 PM MDT	Areal Flood Advisory	BOU	83 min
May 30, 9:10 AM MDT	Areal Flood Advisory	BOU	110 min
Jun 1, 2:51 PM MDT	Areal Flood Advisory	BOU	62 min
Jun 5, 12:28 PM MDT	Flash Flood Warning	BOU	98 min
Jun 6, 12:30 PM MDT	Areal Flood Advisory	BOU	90 min
Jun 7, 5:03 PM MDT	Special Weather Statement	CYS	27 min
Jun 7, 6:25 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jun 8, 6:47 PM MDT	Special Weather Statement	BOU	28 min
Jun 8, 7:15 PM MDT	Special Weather Statement	BOU	30 min
Jun 13, 7:26 PM MDT	Severe Thunderstorm Warning	BOU	34 min
Jun 13, 8:31 PM MDT	Special Weather Statement	BOU	29 min
Jun 16, 2:09 PM MDT	Special Weather Statement	BOU	21 min
Jun 24, 6:19 PM MDT	Areal Flood Advisory	BOU	86 min
Jun 25, 1:25 PM MDT	Areal Flood Advisory	BOU	70 min
Jun 25, 2:04 PM MDT	Flash Flood Warning	BOU	116 min
Jun 28, 12:01 PM MDT	Areal Flood Advisory	BOU	89 min
Jul 1, 8:46 AM MDT	Flash Flood Watch	BOU	12 hr
Jul 1, 11:49 AM MDT	Flash Flood Warning	BOU	116 min
Jul 1, 2:52 PM MDT	Areal Flood Advisory	BOU	83 min
Jul 1, 3:09 PM MDT	Flash Flood Warning	BOU	114 min
Jul 1, 3:51 PM MDT	Areal Flood Advisory	BOU	84 min
Jul 1, 4:42 PM MDT	Areal Flood Advisory	BOU	93 min
Jul 2, 2:26 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 2, 3:26 PM MDT	Areal Flood Advisory	BOU	59 min
Jul 2, 7:17 PM MDT	Areal Flood Advisory	BOU	88 min
Jul 3, 2:03 PM MDT	Areal Flood Advisory	BOU	87 min
Jul 4, 10:34 AM MDT	Areal Flood Advisory	BOU	86 min
Jul 4, 11:54 AM MDT	Areal Flood Advisory	BOU	81 min
Jul 4, 12:10 PM MDT	Special Weather Statement	BOU	50 min
Jul 4, 12:28 PM MDT	Areal Flood Advisory	BOU	77 min
Jul 4, 12:37 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jul 4, 12:49 PM MDT	Special Weather Statement	CYS	41 min
Jul 4, 1:51 PM MDT	Areal Flood Advisory	BOU	75 min
Jul 4, 3:20 PM MDT	Flash Flood Warning Considerable damage threat	BOU	85 min
Jul 5, 3:13 AM MDT	Flash Flood Watch	BOU	21 hr
Jul 5, 1:39 PM MDT	Flash Flood Warning	BOU	96 min
Jul 5, 1:53 PM MDT	Areal Flood Advisory	BOU	82 min
Jul 5, 2:12 PM MDT	Flash Flood Warning	BOU	93 min
Jul 13, 12:43 PM MDT	Areal Flood Advisory	BOU	92 min
Jul 13, 12:53 PM MDT	Special Weather Statement	BOU	37 min
Jul 13, 1:38 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 14, 2:26 PM MDT	Areal Flood Advisory	BOU	94 min
Jul 14, 4:36 PM MDT	Areal Flood Advisory	BOU	84 min
Jul 20, 4:29 PM MDT	Areal Flood Advisory	BOU	91 min
Jul 20, 4:53 PM MDT	Flash Flood Warning	BOU	82 min
Jul 20, 5:24 PM MDT	Flash Flood Warning	BOU	51 min
Jul 20, 6:58 PM MDT	Flash Flood Warning Considerable damage threat	BOU	92 min
Jul 20, 7:09 PM MDT	Flash Flood Warning Considerable damage threat	BOU	81 min
Jul 21, 3:18 AM MDT	Flash Flood Watch	BOU	17 hr
Jul 21, 1:30 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 21, 2:47 PM MDT	Flash Flood Warning	BOU	103 min
Jul 21, 3:16 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 22, 11:15 AM MDT	Areal Flood Advisory	BOU	2 hr
Jul 22, 11:44 AM MDT	Areal Flood Advisory	BOU	2 hr
Jul 22, 12:04 PM MDT	Areal Flood Advisory	BOU	116 min
Jul 22, 2:15 PM MDT	Flash Flood Watch	BOU	30 hr
Jul 25, 4:23 PM MDT	Areal Flood Advisory	BOU	82 min
Jul 29, 2:03 PM MDT	Flash Flood Watch	BOU	55 hr
Jul 29, 5:38 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 29, 7:50 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 29, 10:19 PM MDT	Areal Flood Advisory	BOU	86 min
Jul 30, 1:01 PM MDT	Flash Flood Warning	BOU	7 hr
Jul 30, 1:08 PM MDT	Areal Flood Advisory	BOU	6 min
Jul 30, 1:14 PM MDT	Flash Flood Warning Considerable damage threat	BOU	3 hr
Jul 30, 1:34 PM MDT	Flash Flood Warning Considerable damage threat	BOU	6 hr
Jul 30, 2:07 PM MDT	Flash Flood Warning	BOU	5 hr
Jul 30, 2:42 PM MDT	Special Weather Statement	CYS	33 min
Jul 30, 2:48 PM MDT	Areal Flood Advisory	BOU	87 min
Jul 30, 3:02 PM MDT	Special Weather Statement	BOU	43 min
Jul 30, 3:26 PM MDT	Severe Thunderstorm Warning	BOU	49 min
Jul 30, 3:59 PM MDT	Areal Flood Advisory	BOU	61 min
Jul 30, 4:11 PM MDT	Severe Thunderstorm Warning	BOU	49 min
Jul 30, 4:30 PM MDT	Flash Flood Warning	BOU	4 hr
Jul 30, 5:36 PM MDT	Flash Flood Warning EmergencyCatastrophic damage threat	BOU	3 hr
Jul 30, 7:13 PM MDT	Areal Flood Warning	BOU	3 hr
Jul 30, 7:53 PM MDT	Areal Flood Advisory	BOU	68 min
Jul 31, 11:49 AM MDT	Flash Flood Warning	BOU	2 hr
Jul 31, 1:05 PM MDT	Areal Flood Advisory	BOU	85 min
Jul 31, 2:16 PM MDT	Flash Flood Warning	BOU	89 min
Jul 31, 2:43 PM MDT	Flash Flood Warning	BOU	92 min
Jul 31, 3:24 PM MDT	Flash Flood Warning Considerable damage threat	BOU	81 min
Aug 1, 2:04 PM MDT	Flash Flood Watch	BOU	32 hr
Aug 2, 3:47 PM MDT	Flash Flood Warning	BOU	3 hr
Aug 2, 4:11 PM MDT	Flash Flood Warning	BOU	3 hr
Aug 2, 5:14 PM MDT	Areal Flood Advisory	BOU	91 min
Aug 2, 5:40 PM MDT	Areal Flood Advisory	BOU	95 min
Aug 2, 5:57 PM MDT	Areal Flood Advisory	BOU	93 min
Aug 2, 6:26 PM MDT	Flash Flood Warning	BOU	116 min
Aug 3, 3:41 AM MDT	Flash Flood Watch	BOU	18 hr
Aug 3, 8:39 PM MDT	Areal Flood Advisory	BOU	111 min
Aug 6, 6:53 PM MDT	Flash Flood Warning	BOU	2 hr
Aug 6, 7:36 PM MDT	Special Weather Statement	BOU	24 min
Aug 6, 7:58 PM MDT	Areal Flood Advisory	BOU	2 hr
Aug 6, 10:06 PM MDT	Areal Flood Advisory	BOU	84 min
Aug 13, 3:53 PM MDT	Areal Flood Advisory	BOU	2 hr
Aug 13, 5:40 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 14, 2:55 PM MDT	Areal Flood Advisory	BOU	96 min
Aug 14, 6:48 PM MDT	Flash Flood Warning	BOU	115 min
Aug 16, 3:53 PM MDT	Flash Flood Warning	BOU	112 min
Aug 16, 4:32 PM MDT	Flash Flood Warning	BOU	118 min
Aug 17, 2:07 PM MDT	Areal Flood Advisory	BOU	53 min
Aug 17, 4:04 PM MDT	Areal Flood Advisory	BOU	86 min
Aug 17, 4:41 PM MDT	Flash Flood Warning	BOU	2 hr
Aug 18, 3:01 PM MDT	Areal Flood Advisory	BOU	13 min
Aug 18, 3:14 PM MDT	Flash Flood Warning	BOU	3 hr
Aug 18, 4:54 PM MDT	Areal Flood Advisory	BOU	81 min
Aug 20, 2:12 AM MDT	Areal Flood Advisory	BOU	93 min
Aug 20, 2:15 AM MDT	Flash Flood Warning	BOU	2 hr
Aug 26, 9:55 PM MDT	Special Weather Statement	BOU	50 min
Sep 15, 2:31 PM MDT	Fire Weather Watch	BOU	37 hr
Sep 15, 2:31 PM MDT	Red Flag Warning	BOU	28 hr
Sep 21, 2:07 PM MDT	Frost Advisory	BOU	18 hr
Sep 29, 1:48 PM MDT	Areal Flood Advisory	BOU	96 min
Oct 11, 2:55 PM MDT	Winter Weather Advisory	BOU	39 hr
Oct 12, 3:56 AM MDT	High Wind Watch	BOU	11 hr
Oct 12, 2:47 PM MDT	High Wind Warning	BOU	24 hr
Oct 12, 9:53 PM MDT	Freeze Warning	BOU	10 hr
Oct 13, 4:40 PM MDT	Frost Advisory	BOU	15 hr
Oct 14, 3:01 AM MDT	Freeze Warning	BOU	30 hr
Nov 1, 9:09 AM MDT	Winter Weather Advisory	BOU	36 hr
Nov 17, 4:58 AM MST	Fire Weather Watch	BOU	9 hr
Nov 17, 2:16 PM MST	Red Flag Warning	BOU	39 hr
Nov 22, 2:17 AM MST	Fire Weather Watch	BOU	25 hr
Nov 22, 2:40 PM MST	Red Flag Warning	BOU	26 hr
Dec 4, 2:49 AM MST	High Wind Watch	BOU	12 hr
Dec 4, 2:41 PM MST	High Wind Warning	BOU	20 hr
Dec 5, 3:21 AM MST	Red Flag Warning	BOU	12 hr
Dec 7, 1:47 PM MST	Winter Storm Watch	BOU	22 hr
Dec 8, 11:25 AM MST	Winter Storm Warning	BOU	54 hr
Dec 10, 4:05 AM MST	High Wind Watch	BOU	10 hr
Dec 10, 1:56 PM MST	High Wind Warning	BOU	37 hr
Dec 13, 2:20 PM MST	High Wind Watch	BOU	14 hr
Dec 14, 4:34 AM MST	High Wind Warning	BOU	36 hr
Dec 14, 11:54 AM MST	Winter Weather Advisory	BOU	32 hr
Dec 14, 12:17 PM MST	Red Flag Warning	BOU	29 hr
Dec 20, 1:08 PM MST	Red Flag Warning	BOU	28 hr
Dec 22, 2:47 AM MST	Winter Storm Watch	BOU	12 hr
Dec 22, 3:11 AM MST	Red Flag Warning	BOU	14 hr
Dec 22, 2:33 PM MST	Winter Storm Warning	BOU	68 hr
Dec 25, 3:46 AM MST	Winter Storm Watch	BOU	10 hr
Dec 25, 1:48 PM MST	Winter Weather Advisory	BOU	66 hr
Dec 28, 1:44 PM MST	High Wind Watch	BOU	24 hr
Dec 28, 1:59 PM MST	Winter Storm Watch	BOU	23 hr
Dec 29, 1:18 PM MST	Winter Storm Warning	BOU	70 hr
Dec 29, 1:36 PM MST	High Wind Warning	BOU	30 hr
Dec 30, 3:00 AM MST	Winter Storm Watch	BOU	11 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	5
Mesoscale Discussion	8
Special Weather Statement	16
Flooding
Areal Flood Warning	1
Flash Flood Warning	36
Flash Flood Watch	7
Areal Flood Advisory	53
Winter
Blizzard Warning	1
Winter Storm Warning	9
Winter Storm Watch	10
Winter Weather Advisory	21
Cold
Freeze Warning	2
Wind Chill Warning	1
Frost Advisory	2
Wind Chill Advisory	1
Wind and dust
High Wind Warning	9
High Wind Watch	8
Fire
Red Flag Warning	8
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	1

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. Rebuilt daily.