Weather alerts in Adams County, Colorado, 2024

184 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Adams County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts: 184
Warnings: 77
Watches: 26
Advisories: 30
Busiest month: June42 alerts
Busiest day: May 31, 202412 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 3 tornado warnings covering Adams County in 2024 had a tornado report inside them; 0 of 6 tornado reports fell inside a warning.

Adams County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	0	100%	6	0%
Severe thunderstorm warnings	45	16	64%	28	93%	19 min
Flash flood warnings	2	1	50%	1	100%	73 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Denver/Boulder, CO: tornado warnings	27	2	93%	15	20%	11 min
NWS Denver/Boulder, CO: severe thunderstorm warnings	295	119	60%	339	79%	20 min
NWS Denver/Boulder, CO: flash flood warnings	32	9	72%	14	79%	40 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 7, 3:35 AM MST	Winter Weather Advisory	BOU	31 hr
Jan 11, 3:10 AM MST	Wind Chill Watch	BOU	23 hr
Jan 12, 2:10 AM MST	Wind Chill Warning	BOU	4 days
Feb 1, 2:09 PM MST	Winter Weather Advisory	BOU	54 hr
Feb 2, 2:23 PM MST	Winter Storm Watch	BOU	18 hr
Feb 3, 5:53 PM MST	Dense Fog Advisory	BOU	16 hr
Feb 4, 5:15 PM MST	Dense Fog Advisory	BOU	18 hr
Feb 8, 2:30 PM MST	Winter Storm Watch	BOU	22 hr
Feb 9, 12:47 PM MST	Winter Weather Advisory	BOU	40 hr
Feb 14, 2:18 PM MST	Winter Weather Advisory	BOU	63 hr
Feb 15, 2:22 AM MST	Dense Fog Advisory	BOU	8 hr
Feb 24, 1:49 AM MST	Fire Weather Watch	BOU	12 hr
Feb 24, 1:43 PM MST	Red Flag Warning	BOU	34 hr
Feb 25, 2:13 AM MST	Fire Weather Watch	BOU	11 hr
Feb 25, 1:32 PM MST	Red Flag Warning	BOU	28 hr
Feb 27, 8:39 AM MST	Snow Squall Warning	BOU	36 min
Feb 27, 9:09 AM MST	Snow Squall Warning	BOU	51 min
Feb 27, 9:12 AM MST	Mesoscale Discussion	SPC	3 hr
Feb 27, 9:39 AM MST	Snow Squall Warning	BOU	51 min
Feb 29, 12:10 PM MST	Fire Weather Watch	BOU	19 hr
Mar 1, 6:46 AM MST	Red Flag Warning	BOU	36 hr
Mar 11, 2:29 PM MDT	Winter Storm Watch	BOU	47 hr
Mar 12, 4:17 AM MDT	Winter Weather Advisory	BOU	3 days
Mar 12, 2:12 PM MDT	Winter Storm Warning	BOU	64 hr
Mar 23, 3:22 AM MDT	Winter Weather Advisory	BOU	57 hr
Apr 2, 2:33 PM MDT	Fire Weather Watch	BOU	47 hr
Apr 4, 4:25 AM MDT	Red Flag Warning	BOU	41 hr
Apr 4, 2:58 PM MDT	High Wind Watch	BOU	36 hr
Apr 5, 11:50 AM MDT	High Wind Warning	BOU	54 hr
Apr 5, 1:37 PM MDT	Red Flag Warning	BOU	53 hr
Apr 14, 1:05 AM MDT	Red Flag Warning	BOU	19 hr
Apr 14, 3:30 AM MDT	Fire Weather Watch	BOU	11 hr
Apr 14, 2:13 PM MDT	Red Flag Warning	BOU	30 hr
Apr 19, 3:22 AM MDT	Winter Weather Advisory	BOU	30 hr
Apr 20, 2:00 PM MDT	Dense Fog Advisory	BOU	19 hr
Apr 27, 10:55 AM MDT	Areal Flood Advisory	BOU	5 hr
Apr 28, 6:05 PM MDT	Special Weather Statement	BOU	40 min
Apr 28, 7:07 PM MDT	Special Weather Statement	BOU	38 min
May 6, 1:24 PM MDT	Freeze Watch	BOU	23 hr
May 7, 4:07 PM MDT	Frost Advisory	BOU	16 hr
May 13, 4:17 PM MDT	Special Weather Statement	BOU	28 min
May 13, 5:07 PM MDT	Special Weather Statement	BOU	23 min
May 20, 7:51 PM MDT	Severe Thunderstorm Warning	BOU	39 min
May 20, 8:08 PM MDT	Severe Thunderstorm Warning	BOU	37 min
May 20, 8:14 PM MDT	Tornado Warning	BOU	31 min
May 21, 7:03 PM MDT	Frost Advisory	BOU	13 hr
May 28, 7:34 PM MDT	Special Weather Statement	BOU	26 min
May 28, 7:46 PM MDT	Severe Thunderstorm Warning	BOU	29 min
May 28, 7:51 PM MDT	Severe Thunderstorm Warning	BOU	24 min
May 29, 12:18 PM MDT	Mesoscale Discussion	SPC	117 min
May 29, 2:10 PM MDT	Tornado Warning Tornado observed	BOU	50 min
May 29, 2:27 PM MDT	Mesoscale Discussion	SPC	2 hr
May 30, 8:57 PM MDT	Severe Thunderstorm Warning	BOU	48 min
May 30, 9:07 PM MDT	Severe Thunderstorm Warning	BOU	53 min
May 30, 9:25 PM MDT	Severe Thunderstorm Warning	BOU	50 min
May 30, 9:30 PM MDT	Severe Thunderstorm Warning	BOU	45 min
May 30, 9:43 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	47 min
May 30, 10:04 PM MDT	Severe Thunderstorm Warning	BOU	41 min
May 30, 10:12 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BOU	48 min
May 30, 10:15 PM MDT	Severe Thunderstorm Warning	BOU	45 min
May 30, 10:35 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	40 min
May 30, 10:47 PM MDT	Severe Thunderstorm Warning	BOU	58 min
May 30, 10:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	48 min
May 31, 2:00 PM MDT	Mesoscale Discussion	SPC	90 min
Jun 1, 1:08 PM MDT	Mesoscale Discussion	SPC	97 min
Jun 2, 1:51 PM MDT	Mesoscale Discussion	SPC	39 min
Jun 7, 7:54 PM MDT	Severe Thunderstorm Warning	BOU	36 min
Jun 8, 11:51 AM MDT	Mesoscale Discussion	SPC	114 min
Jun 8, 12:26 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 8, 1:34 PM MDT	Severe Thunderstorm Warning	BOU	41 min
Jun 8, 2:06 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jun 8, 2:44 PM MDT	Severe Thunderstorm Warning	BOU	31 min
Jun 8, 3:14 PM MDT	Severe Thunderstorm Warning	BOU	46 min
Jun 8, 3:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	47 min
Jun 8, 4:42 PM MDT	Severe Thunderstorm Warning	BOU	33 min
Jun 8, 4:55 PM MDT	Areal Flood Advisory	BOU	3 hr
Jun 9, 3:08 PM MDT	Severe Thunderstorm Warning	BOU	37 min
Jun 9, 3:32 PM MDT	Flash Flood Warning	BOU	113 min
Jun 9, 3:42 PM MDT	Severe Thunderstorm Warning	BOU	33 min
Jun 9, 4:22 PM MDT	Areal Flood Advisory	BOU	2 hr
Jun 10, 6:12 PM MDT	Severe Thunderstorm Warning	BOU	28 min
Jun 13, 12:53 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 14, 1:44 PM MDT	Mesoscale Discussion	SPC	61 min
Jun 14, 2:10 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 14, 2:26 PM MDT	Severe Thunderstorm Warning	BOU	15 min
Jun 14, 3:20 PM MDT	Severe Thunderstorm Warning	BOU	40 min
Jun 14, 3:59 PM MDT	Severe Thunderstorm Warning	BOU	33 min
Jun 15, 2:32 PM MDT	Red Flag Warning	BOU	27 hr
Jun 15, 2:35 PM MDT	Heat Advisory	BOU	28 hr
Jun 15, 5:20 PM MDT	Special Weather Statement	BOU	40 min
Jun 15, 5:23 PM MDT	Special Weather Statement	BOU	52 min
Jun 15, 6:19 PM MDT	Special Weather Statement	BOU	26 min
Jun 16, 2:42 PM MDT	Fire Weather Watch	BOU	12 hr
Jun 16, 2:42 PM MDT	Red Flag Warning	BOU	30 hr
Jun 16, 6:58 PM MDT	Special Weather Statement	BOU	32 min
Jun 16, 7:28 PM MDT	Special Weather Statement	BOU	47 min
Jun 20, 5:16 PM MDT	Special Weather Statement	BOU	29 min
Jun 20, 7:22 PM MDT	Areal Flood Advisory	BOU	3 hr
Jun 22, 2:15 PM MDT	Heat Advisory	BOU	3 days
Jun 24, 5:00 PM MDT	Special Weather Statement	BOU	30 min
Jun 24, 7:05 PM MDT	Special Weather Statement	BOU	40 min
Jun 25, 5:09 PM MDT	Special Weather Statement	BOU	36 min
Jun 26, 2:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 8:04 PM MDT	Special Weather Statement	BOU	26 min
Jun 29, 6:18 PM MDT	Severe Thunderstorm Warning	BOU	27 min
Jun 30, 3:54 PM MDT	Mesoscale Discussion	SPC	96 min
Jul 3, 3:02 PM MDT	Severe Thunderstorm Warning	BOU	43 min
Jul 3, 3:47 PM MDT	Severe Thunderstorm Warning	BOU	43 min
Jul 3, 4:27 PM MDT	Severe Thunderstorm Warning	BOU	28 min
Jul 7, 2:12 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 7, 2:47 PM MDT	Severe Thunderstorm Warning	BOU	28 min
Jul 7, 2:51 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 7, 4:10 PM MDT	Special Weather Statement	BOU	35 min
Jul 10, 12:24 PM MDT	Heat Advisory	BOU	56 hr
Jul 10, 12:24 PM MDT	Heat Advisory	BOU	3 days
Jul 10, 12:24 PM MDT	Heat Advisory	BOU	4 days
Jul 11, 4:22 PM MDT	Mesoscale Discussion	SPC	113 min
Jul 13, 10:27 PM MDT	Special Weather Statement	BOU	48 min
Jul 15, 2:49 PM MDT	Mesoscale Discussion	SPC	86 min
Jul 17, 12:20 PM MDT	Mesoscale Discussion	SPC	115 min
Jul 17, 2:49 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 18, 4:01 PM MDT	Mesoscale Discussion	SPC	89 min
Jul 19, 1:21 PM MDT	Severe Thunderstorm Warning	BOU	24 min
Jul 20, 1:57 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 20, 8:32 PM MDT	Severe Thunderstorm Warning	BOU	28 min
Jul 20, 9:14 PM MDT	Areal Flood Advisory	BOU	3 hr
Jul 25, 9:55 AM MDT	Red Flag Warning	BOU	9 hr
Jul 27, 3:16 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 29, 2:41 AM MDT	Heat Advisory	BOU	41 hr
Aug 2, 1:42 PM MDT	Heat Advisory	BOU	54 hr
Aug 2, 2:49 PM MDT	Mesoscale Discussion	SPC	116 min
Aug 2, 5:18 PM MDT	Special Weather Statement	BOU	42 min
Aug 4, 4:20 PM MDT	Special Weather Statement	BOU	40 min
Aug 7, 12:57 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 4:13 PM MDT	Severe Thunderstorm Warning	BOU	32 min
Aug 7, 4:43 PM MDT	Tornado Warning	BOU	32 min
Aug 7, 5:09 PM MDT	Severe Thunderstorm Warning	BOU	37 min
Aug 7, 5:30 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 5:41 PM MDT	Severe Thunderstorm Warning	BOU	31 min
Aug 11, 6:06 PM MDT	Severe Thunderstorm Warning	BOU	24 min
Aug 12, 9:50 AM MDT	Flood Watch	BOU	14 hr
Aug 12, 1:05 PM MDT	Mesoscale Discussion	SPC	115 min
Aug 13, 2:42 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 13, 4:52 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 13, 5:18 PM MDT	Severe Thunderstorm Warning	BOU	42 min
Aug 19, 1:19 PM MDT	Mesoscale Discussion	SPC	86 min
Aug 19, 2:15 PM MDT	Severe Thunderstorm Warning	BOU	45 min
Aug 19, 2:57 PM MDT	Severe Thunderstorm Warning	BOU	48 min
Aug 19, 3:36 PM MDT	Areal Flood Advisory	BOU	3 hr
Aug 19, 3:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	49 min
Aug 19, 3:53 PM MDT	Flash Flood Warning	BOU	3 hr
Aug 19, 6:07 PM MDT	Mesoscale Discussion	SPC	53 min
Aug 19, 7:01 PM MDT	Areal Flood Advisory	BOU	3 hr
Aug 23, 3:35 PM MDT	Special Weather Statement	BOU	40 min
Sep 2, 3:53 AM MDT	Red Flag Warning	BOU	16 hr
Sep 4, 5:27 PM MDT	Special Weather Statement	BOU	48 min
Sep 10, 2:01 PM MDT	Fire Weather Watch	BOU	24 hr
Sep 11, 2:14 PM MDT	Red Flag Warning	BOU	30 hr
Sep 15, 3:21 PM MDT	Special Weather Statement	BOU	39 min
Sep 17, 1:08 PM MDT	Mesoscale Discussion	SPC	3 hr
Sep 17, 2:36 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Sep 17, 2:54 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 17, 3:05 PM MDT	Special Weather Statement	BOU	40 min
Sep 17, 4:04 PM MDT	Severe Thunderstorm Warning	BOU	41 min
Sep 29, 1:13 PM MDT	Fire Weather Watch	BOU	39 hr
Oct 3, 2:18 PM MDT	Fire Weather Watch	BOU	23 hr
Oct 4, 1:27 PM MDT	Red Flag Warning	BOU	30 hr
Oct 16, 2:31 AM MDT	Fire Weather Watch	BOU	11 hr
Oct 16, 1:36 PM MDT	Red Flag Warning	BOU	28 hr
Oct 24, 2:56 AM MDT	Frost Advisory	BOU	30 hr
Oct 24, 3:04 AM MDT	Red Flag Warning	BOU	15 hr
Oct 28, 2:43 PM MDT	Red Flag Warning	BOU	27 hr
Oct 28, 3:04 PM MDT	Freeze Watch	BOU	23 hr
Oct 29, 1:59 PM MDT	Freeze Warning	BOU	43 hr
Nov 5, 3:38 AM MST	Winter Weather Advisory	BOU	61 hr
Nov 5, 2:17 PM MST	Winter Storm Warning	BOU	4 days
Nov 7, 3:51 AM MST	Winter Storm Watch	BOU	10 hr
Nov 7, 1:43 PM MST	Winter Storm Warning	BOU	46 hr
Nov 8, 12:51 PM MST	Mesoscale Discussion	SPC	4 hr
Nov 25, 1:15 AM MST	Winter Weather Advisory	BOU	61 hr
Dec 28, 2:12 PM MST	High Wind Watch	BOU	24 hr
Dec 28, 2:27 PM MST	Fire Weather Watch	BOU	13 hr
Dec 29, 3:35 AM MST	Red Flag Warning	BOU	37 hr
Dec 29, 2:17 PM MST	High Wind Warning	BOU	27 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	45
Tornado Warning	3
Severe Thunderstorm Watch	5
Mesoscale Discussion	28
Special Weather Statement	23
Flooding
Flash Flood Warning	2
Flood Watch	1
Areal Flood Advisory	7
Winter
Snow Squall Warning	3
Winter Storm Warning	3
Winter Storm Watch	4
Winter Weather Advisory	9
Heat
Heat Advisory	7
Cold
Freeze Warning	1
Wind Chill Warning	1
Freeze Watch	2
Wind Chill Watch	1
Frost Advisory	3
Wind and dust
High Wind Warning	2
High Wind Watch	2
Fire
Red Flag Warning	17
Fire Weather Watch	11
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 2023 2025

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.