Alert archive / Colorado / Larimer County

Weather alerts in Larimer County, Colorado, 2014

210 weather alerts in 2014, 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 2014. Tap one for its archive.

Alerts: 210
Warnings: 72
Watches: 34
Advisories: 74
Busiest month: July45 alerts
Busiest day: July 29, 201410 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 2 tornado warnings covering Larimer County in 2014 had a tornado report inside them.

Larimer County, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	20	9	55%	37	46%	10 min
Flash flood warnings	15	6	60%	10	70%	26 min

Each office's whole area, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Denver/Boulder, CO: tornado warnings	83	23	72%	56	63%	13 min
NWS Denver/Boulder, CO: severe thunderstorm warnings	277	94	66%	293	63%	16 min
NWS Denver/Boulder, CO: flash flood warnings	41	9	78%	22	59%	33 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 3, 4:10 AM MST	Winter Storm Warning	BOU	48 hr
Jan 3, 4:10 AM MST	Winter Weather Advisory	BOU	48 hr
Jan 8, 3:21 PM MST	Winter Storm Watch	BOU	13 hr
Jan 9, 4:31 AM MST	Winter Weather Advisory	BOU	61 hr
Jan 9, 9:04 PM MST	High Wind Warning	BOU	50 hr
Jan 11, 4:08 AM MST	Winter Storm Watch	BOU	9 hr
Jan 11, 12:41 PM MST	Winter Storm Warning	BOU	51 hr
Jan 11, 11:13 PM MST	High Wind Warning	BOU	21 hr
Jan 12, 8:09 PM MST	High Wind Warning	BOU	20 hr
Jan 13, 4:06 PM MST	Winter Weather Advisory	BOU	29 hr
Jan 13, 8:06 PM MST	High Wind Warning	BOU	8 hr
Jan 27, 8:33 AM MST	Winter Weather Advisory	BOU	10 hr
Jan 28, 3:14 AM MST	Winter Storm Watch	BOU	12 hr
Jan 28, 3:36 PM MST	Winter Storm Warning	BOU	61 hr
Jan 29, 3:45 AM MST	High Wind Watch	BOU	9 hr
Jan 29, 12:31 PM MST	High Wind Warning	BOU	16 hr
Jan 29, 3:22 PM MST	Winter Storm Watch	BOU	14 hr
Feb 5, 12:22 AM MST	Wind Chill Warning	BOU	11 hr
Feb 5, 2:44 PM MST	Wind Chill Advisory	BOU	20 hr
Feb 6, 3:24 PM MST	Winter Storm Watch	BOU	15 hr
Feb 7, 6:31 AM MST	Winter Storm Warning	BOU	70 hr
Feb 10, 4:24 AM MST	Dense Fog Advisory	BOU	5 hr
Feb 10, 4:34 AM MST	Winter Weather Advisory	BOU	7 hr
Feb 10, 9:59 PM MST	Dense Fog Advisory	BOU	11 hr
Feb 11, 4:02 AM MST	Winter Storm Watch	BOU	24 hr
Feb 11, 7:20 PM MST	High Wind Watch	BOU	14 hr
Feb 12, 3:51 AM MST	Winter Weather Advisory	BOU	43 hr
Feb 12, 9:00 AM MST	High Wind Warning	BOU	18 hr
Feb 13, 4:29 AM MST	High Wind Watch	BOU	27 hr
Feb 14, 7:14 AM MST	High Wind Warning	BOU	29 hr
Feb 16, 4:56 AM MST	Winter Weather Advisory	BOU	19 hr
Feb 16, 4:47 PM MST	High Wind Warning	BOU	4 hr
Feb 16, 8:37 PM MST	High Wind Warning	BOU	7 hr
Feb 17, 4:23 AM MST	High Wind Watch	BOU	8 hr
Feb 17, 12:08 PM MST	High Wind Warning	BOU	22 hr
Feb 18, 2:07 PM MST	Winter Weather Advisory	BOU	39 hr
Feb 20, 6:23 AM MST	High Wind Watch	BOU	5 hr
Feb 20, 6:23 AM MST	High Wind Warning	BOU	23 hr
Feb 22, 9:51 AM MST	Winter Weather Advisory	BOU	20 hr
Feb 23, 11:26 PM MST	Dense Fog Advisory	BOU	10 hr
Feb 27, 3:49 AM MST	Winter Weather Advisory	BOU	24 hr
Feb 28, 4:01 PM MST	Winter Weather Advisory	BOU	26 hr
Mar 4, 2:44 PM MST	Winter Weather Advisory	BOU	11 hr
Mar 6, 4:58 AM MST	Winter Weather Advisory	BOU	45 hr
Mar 7, 5:06 AM MST	Winter Storm Warning	BOU	21 hr
Mar 17, 4:32 AM MDT	Winter Weather Advisory	BOU	34 hr
Mar 26, 4:37 AM MDT	Winter Weather Advisory	BOU	25 hr
Mar 30, 4:25 AM MDT	Winter Weather Advisory	BOU	30 hr
Mar 30, 4:38 AM MDT	High Wind Watch	BOU	7 hr
Mar 30, 11:13 AM MDT	High Wind Warning	BOU	30 hr
Apr 2, 4:32 AM MDT	Winter Weather Advisory	BOU	31 hr
Apr 11, 2:50 PM MDT	Winter Storm Watch	BOU	25 hr
Apr 12, 3:51 PM MDT	Winter Storm Warning	BOU	32 hr
Apr 12, 3:51 PM MDT	Winter Weather Advisory	BOU	32 hr
Apr 25, 2:20 PM MDT	Winter Storm Watch	BOU	16 hr
Apr 26, 4:07 AM MDT	High Wind Watch	BOU	41 hr
Apr 26, 6:01 AM MDT	Winter Storm Warning	BOU	39 hr
Apr 26, 9:30 PM MDT	High Wind Warning	BOU	24 hr
Apr 28, 9:00 PM MDT	High Wind Warning	BOU	23 hr
May 7, 12:37 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 7, 1:31 PM MDT	Special Weather Statement	BOU	44 min
May 7, 1:45 PM MDT	Severe Thunderstorm Warning	BOU	45 min
May 7, 2:33 PM MDT	Severe Thunderstorm Warning	BOU	27 min
May 7, 2:56 PM MDT	Severe Thunderstorm Warning	BOU	34 min
May 7, 3:00 PM MDT	Severe Thunderstorm Warning	BOU	45 min
May 7, 4:05 PM MDT	Mesoscale Discussion	SPC	85 min
May 7, 6:34 PM MDT	Mesoscale Discussion	SPC	56 min
May 7, 6:39 PM MDT	Severe Thunderstorm Warning	BOU	36 min
May 9, 4:30 AM MDT	Winter Storm Watch	BOU	49 hr
May 9, 5:28 AM MDT	Dense Fog Advisory	BOU	4 hr
May 10, 6:00 AM MDT	Winter Storm Warning	BOU	54 hr
May 12, 4:32 AM MDT	Freeze Warning	BOU	27 hr
May 13, 3:14 PM MDT	Freeze Warning	BOU	16 hr
May 20, 2:31 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
May 20, 4:50 PM MDT	Mesoscale Discussion	SPC	85 min
May 21, 12:34 PM MDT	Tornado Watch	SPC	8 hr
May 22, 12:07 PM MDT	Mesoscale Discussion	SPC	83 min
May 22, 12:34 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
May 22, 12:52 PM MDT	Special Weather Statement	BOU	38 min
May 22, 1:50 PM MDT	Special Weather Statement	BOU	40 min
May 22, 2:01 PM MDT	Severe Thunderstorm Warning	BOU	44 min
May 22, 2:03 PM MDT	Tornado Warning	BOU	27 min
May 22, 2:36 PM MDT	Tornado Warning	BOU	24 min
May 23, 4:26 PM MDT	River Flood Advisory	BOU	38 hr
May 23, 5:59 PM MDT	Areal Flood Advisory	BOU	3 hr
May 23, 7:21 PM MDT	Flash Flood Warning	BOU	3 hr
May 23, 8:10 PM MDT	Flash Flood Warning	BOU	3 hr
May 23, 10:06 PM MDT	Areal Flood Warning	BOU	4 hr
May 23, 11:09 PM MDT	Areal Flood Advisory	BOU	96 min
May 24, 5:50 AM MDT	Flash Flood Watch	BOU	17 hr
May 25, 10:24 AM MDT	River Flood Advisory	BOU	30 hr
May 25, 12:18 PM MDT	Areal Flood Advisory	BOU	87 min
May 25, 2:03 PM MDT	Areal Flood Advisory	BOU	117 min
May 25, 2:19 PM MDT	Flash Flood Warning	BOU	2 hr
May 26, 7:25 PM MDT	Areal Flood Advisory	BOU	24 hr
May 28, 12:10 PM MDT	River Flood Advisory	BOU	6 days
May 30, 5:17 AM MDT	Flash Flood Watch	BOU	15 hr
May 30, 3:03 PM MDT	Areal Flood Advisory	BOU	3 hr
May 31, 2:07 AM MDT	River Flood Warning	BOU	59 hr
May 31, 6:21 AM MDT	Dense Fog Advisory	BOU	3 hr
May 31, 1:34 PM MDT	Mesoscale Discussion	SPC	116 min
May 31, 6:08 PM MDT	Areal Flood Advisory	BOU	112 min
Jun 3, 11:34 AM MDT	River Flood Advisory	BOU	6 days
Jun 14, 2:44 PM MDT	Severe Thunderstorm Warning	BOU	31 min
Jun 22, 2:48 PM MDT	Severe Thunderstorm Warning	BOU	42 min
Jun 22, 4:48 PM MDT	Severe Thunderstorm Warning	BOU	27 min
Jun 22, 4:53 PM MDT	Areal Flood Advisory	BOU	97 min
Jun 23, 1:39 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 4:06 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 23, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	23 min
Jun 23, 7:46 PM MDT	Special Weather Statement	CYS	59 min
Jun 24, 2:44 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 24, 8:06 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jun 24, 8:13 PM MDT	Areal Flood Advisory	BOU	92 min
Jun 24, 8:21 PM MDT	Special Weather Statement	CYS	54 min
Jun 24, 10:48 PM MDT	Severe Thunderstorm Warning	BOU	27 min
Jun 24, 11:03 PM MDT	Flash Flood Warning	BOU	2 hr
Jun 25, 1:28 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 2:14 PM MDT	Special Weather Statement	BOU	46 min
Jun 25, 2:23 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 26, 2:07 PM MDT	Mesoscale Discussion	SPC	53 min
Jun 27, 11:52 AM MDT	Special Weather Statement	BOU	53 min
Jun 27, 12:18 PM MDT	Areal Flood Advisory	BOU	87 min
Jul 3, 4:15 PM MDT	Special Weather Statement	BOU	15 min
Jul 6, 2:34 PM MDT	Severe Thunderstorm Warning	BOU	26 min
Jul 6, 3:32 PM MDT	Areal Flood Advisory	BOU	118 min
Jul 7, 6:58 PM MDT	Areal Flood Advisory	BOU	92 min
Jul 7, 7:15 PM MDT	Severe Thunderstorm Warning	BOU	45 min
Jul 7, 7:58 PM MDT	Severe Thunderstorm Warning	BOU	26 min
Jul 7, 8:34 PM MDT	Mesoscale Discussion	SPC	56 min
Jul 11, 1:13 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 11, 5:02 PM MDT	Areal Flood Advisory	BOU	118 min
Jul 12, 3:01 PM MDT	Areal Flood Advisory	BOU	89 min
Jul 12, 4:02 PM MDT	Areal Flood Advisory	BOU	88 min
Jul 12, 4:34 PM MDT	Areal Flood Advisory	BOU	86 min
Jul 13, 5:42 PM MDT	Areal Flood Advisory	BOU	93 min
Jul 13, 6:09 PM MDT	Flash Flood Warning	BOU	96 min
Jul 14, 3:08 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 14, 3:22 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jul 14, 3:58 PM MDT	Severe Thunderstorm Warning	BOU	32 min
Jul 14, 7:34 PM MDT	Areal Flood Advisory	BOU	86 min
Jul 14, 7:43 PM MDT	Severe Thunderstorm Warning	BOU	47 min
Jul 14, 7:49 PM MDT	Flash Flood Warning	BOU	116 min
Jul 14, 8:19 PM MDT	Flash Flood Warning	BOU	2 hr
Jul 14, 8:30 PM MDT	Severe Thunderstorm Warning	BOU	34 min
Jul 15, 1:29 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 15, 2:25 PM MDT	Special Weather Statement	CYS	50 min
Jul 15, 3:17 PM MDT	Flash Flood Warning	BOU	118 min
Jul 21, 4:15 PM MDT	Special Weather Statement	BOU	30 min
Jul 23, 2:53 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 23, 3:44 PM MDT	Special Weather Statement	CYS	46 min
Jul 24, 1:49 PM MDT	Special Weather Statement	BOU	26 min
Jul 24, 2:19 PM MDT	Special Weather Statement	BOU	26 min
Jul 25, 3:35 PM MDT	Special Weather Statement	BOU	25 min
Jul 27, 6:14 PM MDT	Special Weather Statement	CYS	46 min
Jul 28, 1:22 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 28, 1:37 PM MDT	Flash Flood Watch	BOU	52 hr
Jul 28, 10:31 PM MDT	Areal Flood Advisory	BOU	119 min
Jul 29, 12:02 PM MDT	Areal Flood Advisory	BOU	88 min
Jul 29, 12:20 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 29, 1:36 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 29, 1:59 PM MDT	Areal Flood Advisory	BOU	2 hr
Jul 29, 2:10 PM MDT	Areal Flood Advisory	BOU	3 hr
Jul 29, 2:35 PM MDT	Areal Flood Advisory	BOU	3 hr
Jul 29, 2:44 PM MDT	Flash Flood Warning	BOU	6 hr
Jul 29, 3:16 PM MDT	Flash Flood Warning	BOU	3 hr
Jul 29, 5:05 PM MDT	Flash Flood Warning	BOU	6 hr
Jul 30, 1:53 AM MDT	Areal Flood Advisory	BOU	112 min
Aug 4, 4:30 PM MDT	Special Weather Statement	BOU	45 min
Aug 5, 2:47 PM MDT	Areal Flood Advisory	BOU	88 min
Aug 9, 8:58 PM MDT	Areal Flood Advisory	BOU	92 min
Aug 14, 1:23 PM MDT	Special Weather Statement	BOU	52 min
Aug 23, 1:07 PM MDT	Mesoscale Discussion	SPC	113 min
Aug 23, 2:24 PM MDT	Severe Thunderstorm Warning	BOU	36 min
Aug 26, 4:08 PM MDT	Flash Flood Warning	BOU	2 hr
Aug 29, 1:19 PM MDT	Special Weather Statement	BOU	56 min
Sep 6, 4:51 PM MDT	Special Weather Statement	BOU	54 min
Sep 12, 10:22 AM MDT	Frost Advisory	BOU	21 hr
Sep 21, 3:54 PM MDT	Areal Flood Advisory	BOU	2 hr
Oct 1, 3:19 AM MDT	Winter Weather Advisory	BOU	21 hr
Oct 2, 2:57 PM MDT	Frost Advisory	BOU	17 hr
Oct 3, 3:27 PM MDT	Frost Advisory	BOU	18 hr
Oct 11, 2:39 PM MDT	Winter Weather Advisory	BOU	33 hr
Oct 12, 8:05 PM MDT	Frost Advisory	BOU	12 hr
Oct 13, 10:06 AM MDT	Frost Advisory	BOU	22 hr
Oct 26, 3:14 PM MDT	Freeze Watch	BOU	23 hr
Oct 27, 2:21 PM MDT	Freeze Warning	BOU	18 hr
Oct 28, 1:44 PM MDT	Freeze Warning	BOU	18 hr
Nov 2, 5:49 AM MST	Winter Weather Advisory	BOU	31 hr
Nov 11, 9:32 PM MST	Wind Chill Advisory	BOU	11 hr
Nov 12, 2:35 AM MST	Winter Weather Advisory	BOU	15 hr
Nov 12, 5:12 PM MST	Wind Chill Advisory	BOU	16 hr
Nov 12, 5:12 PM MST	Winter Weather Advisory	BOU	35 hr
Nov 14, 4:39 AM MST	Winter Weather Advisory	BOU	38 hr
Nov 17, 3:30 PM MST	High Wind Watch	BOU	14 hr
Nov 18, 5:46 AM MST	High Wind Warning	BOU	15 hr
Nov 21, 4:06 AM MST	Winter Storm Watch	BOU	16 hr
Nov 21, 7:50 PM MST	Winter Storm Warning	BOU	69 hr
Nov 24, 4:06 AM MST	High Wind Watch	BOU	12 hr
Nov 24, 3:30 PM MST	Winter Weather Advisory	BOU	45 hr
Nov 24, 3:56 PM MST	High Wind Warning	BOU	29 hr
Nov 28, 2:26 PM MST	High Wind Watch	BOU	20 hr
Nov 29, 10:31 AM MST	High Wind Warning	BOU	17 hr
Dec 13, 2:07 PM MST	Winter Weather Advisory	BOU	39 hr
Dec 19, 12:55 PM MST	Winter Storm Watch	BOU	26 hr
Dec 20, 10:12 AM MST	Winter Storm Warning	BOU	62 hr
Dec 22, 6:01 AM MST	High Wind Watch	BOU	23 hr
Dec 24, 5:43 AM MST	Winter Storm Watch	BOU	9 hr
Dec 24, 2:38 PM MST	Winter Storm Warning	BOU	37 hr
Dec 24, 2:38 PM MST	Winter Weather Advisory	BOU	37 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	20
Tornado Warning	2
Severe Thunderstorm Watch	6
Tornado Watch	1
Mesoscale Discussion	11
Special Weather Statement	19
Flooding
Areal Flood Warning	1
Flash Flood Warning	15
River Flood Warning	1
Flash Flood Watch	3
Areal Flood Advisory	30
River Flood Advisory	4
Winter
Winter Storm Warning	11
Winter Storm Watch	12
Winter Weather Advisory	27
Cold
Freeze Warning	4
Wind Chill Warning	1
Freeze Watch	1
Frost Advisory	5
Wind Chill Advisory	3
Wind and dust
High Wind Warning	17
High Wind Watch	11
Fog and smoke
Dense Fog Advisory	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2013 2015

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.