Weather alerts in Logan County, Colorado, 2023

235 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Logan County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 235
Warnings: 89
Watches: 34
Advisories: 36
Busiest month: June86 alerts
Busiest day: June 21, 202320 alerts

Over time

By month

Warning verification

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

3 of 15 tornado warnings covering Logan County in 2023 had a tornado report inside them; 5 of 9 tornado reports fell inside a warning, on average 12 minutes after it went out.

Logan County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	15	3	80%	9	56%	12 min
Severe thunderstorm warnings	56	21	63%	27	67%	21 min
Flash flood warnings	4	2	50%	2	50%	179 min

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Denver/Boulder, CO: tornado warnings	67	20	70%	79	71%	13 min
NWS Denver/Boulder, CO: severe thunderstorm warnings	467	169	64%	521	75%	18 min
NWS Denver/Boulder, CO: flash flood warnings	80	19	76%	35	74%	74 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, 3:06 AM MST	Winter Weather Advisory	BOU	45 hr
Jan 2, 4:59 PM MST	Mesoscale Discussion	SPC	6 hr
Jan 2, 6:09 PM MST	Winter Storm Warning	BOU	14 hr
Jan 10, 2:06 PM MST	Winter Weather Advisory	BOU	33 hr
Jan 11, 11:52 AM MST	Mesoscale Discussion	SPC	3 hr
Jan 15, 2:52 PM MST	Winter Storm Watch	BOU	22 hr
Jan 16, 12:36 PM MST	Winter Storm Warning	BOU	58 hr
Jan 29, 3:28 AM MST	Wind Chill Advisory	BOU	30 hr
Jan 30, 3:16 AM MST	Wind Chill Advisory	BOU	29 hr
Feb 21, 3:50 AM MST	Winter Weather Advisory	BOU	49 hr
Feb 21, 2:53 PM MST	Wind Chill Advisory	BOU	42 hr
Feb 22, 2:45 PM MST	Wind Chill Warning	BOU	18 hr
Mar 25, 2:39 AM MDT	Winter Weather Advisory	BOU	24 hr
Mar 26, 2:20 PM MDT	Winter Weather Advisory	BOU	28 hr
Mar 27, 9:08 AM MDT	Winter Storm Warning	BOU	9 hr
Apr 11, 2:33 PM MDT	Fire Weather Watch	BOU	24 hr
Apr 12, 2:35 PM MDT	Red Flag Warning	BOU	29 hr
Apr 16, 5:02 AM MDT	Fire Weather Watch	BOU	34 hr
Apr 17, 2:35 PM MDT	Red Flag Warning	BOU	29 hr
Apr 27, 11:42 AM MDT	Mesoscale Discussion	SPC	2 hr
Apr 27, 3:20 PM MDT	Special Weather Statement	BOU	85 min
May 4, 5:09 PM MDT	Special Weather Statement	BOU	51 min
May 4, 5:19 PM MDT	Special Weather Statement	BOU	41 min
May 5, 2:54 PM MDT	Mesoscale Discussion	SPC	2 hr
May 5, 4:09 PM MDT	Special Weather Statement	BOU	51 min
May 7, 11:49 AM MDT	Mesoscale Discussion	SPC	116 min
May 10, 12:17 AM MDT	Mesoscale Discussion	SPC	58 min
May 10, 3:08 AM MDT	Flood Watch	BOU	57 hr
May 10, 1:25 PM MDT	Mesoscale Discussion	SPC	2 hr
May 10, 1:55 PM MDT	Tornado Watch	SPC	7 hr
May 10, 4:45 PM MDT	Mesoscale Discussion	SPC	90 min
May 10, 5:55 PM MDT	Severe Thunderstorm Warning	BOU	50 min
May 10, 6:33 PM MDT	Tornado Warning	BOU	27 min
May 10, 6:42 PM MDT	Severe Thunderstorm Warning	BOU	48 min
May 10, 6:55 PM MDT	Tornado Warning	BOU	35 min
May 10, 7:48 PM MDT	Areal Flood Advisory	BOU	117 min
May 16, 12:57 PM MDT	Mesoscale Discussion	SPC	2 hr
May 17, 11:52 AM MDT	Mesoscale Discussion	SPC	113 min
May 18, 3:17 PM MDT	Special Weather Statement	BOU	28 min
May 18, 3:36 PM MDT	Special Weather Statement	BOU	24 min
May 18, 4:07 PM MDT	Special Weather Statement	BOU	23 min
May 18, 4:18 PM MDT	Mesoscale Discussion	SPC	87 min
May 18, 4:35 PM MDT	Areal Flood Advisory	BOU	3 hr
May 18, 4:37 PM MDT	Special Weather Statement	BOU	38 min
May 25, 9:39 PM MDT	Special Weather Statement	BOU	51 min
May 26, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 26, 4:33 PM MDT	Mesoscale Discussion	SPC	117 min
May 26, 5:43 PM MDT	Severe Thunderstorm Warning	BOU	47 min
May 26, 6:28 PM MDT	Areal Flood Advisory	BOU	92 min
May 27, 2:01 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 27, 10:43 PM MDT	Areal Flood Advisory	BOU	3 hr
May 28, 5:29 PM MDT	Severe Thunderstorm Warning	BOU	31 min
May 28, 5:58 PM MDT	Severe Thunderstorm Warning	BOU	47 min
May 29, 1:21 PM MDT	Mesoscale Discussion	SPC	114 min
May 29, 2:14 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 29, 5:00 PM MDT	Mesoscale Discussion	SPC	2 hr
May 30, 3:34 PM MDT	Mesoscale Discussion	SPC	86 min
May 30, 3:56 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
May 30, 6:46 PM MDT	Severe Thunderstorm Warning	BOU	44 min
May 30, 7:10 PM MDT	Mesoscale Discussion	SPC	2 hr
May 30, 7:28 PM MDT	Severe Thunderstorm Warning	BOU	32 min
Jun 1, 4:29 PM MDT	Special Weather Statement	BOU	91 min
Jun 1, 7:06 PM MDT	Areal Flood Advisory	BOU	114 min
Jun 2, 3:56 PM MDT	Special Weather Statement	BOU	34 min
Jun 2, 4:59 PM MDT	Areal Flood Advisory	BOU	2 hr
Jun 2, 5:07 PM MDT	Special Weather Statement	BOU	38 min
Jun 2, 5:16 PM MDT	Special Weather Statement	BOU	29 min
Jun 2, 5:58 PM MDT	Areal Flood Advisory	BOU	92 min
Jun 2, 7:57 PM MDT	Areal Flood Advisory	BOU	3 hr
Jun 10, 3:45 PM MDT	Mesoscale Discussion	SPC	60 min
Jun 12, 3:24 AM MDT	Flood Watch	BOU	21 hr
Jun 13, 8:19 PM MDT	River Flood Advisory	BOU	3 days
Jun 13, 10:17 PM MDT	River Flood Warning	BOU	17 hr
Jun 14, 1:14 PM MDT	River Flood Advisory	BOU	8 days
Jun 14, 3:44 PM MDT	River Flood Advisory	BOU	10 days
Jun 15, 1:45 PM MDT	Special Weather Statement	BOU	45 min
Jun 21, 11:51 AM MDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 12:33 PM MDT	Tornado Watch	SPC	7 hr
Jun 21, 1:17 PM MDT	Severe Thunderstorm Warning	BOU	43 min
Jun 21, 1:48 PM MDT	Special Weather Statement	BOU	42 min
Jun 21, 1:53 PM MDT	Severe Thunderstorm Warning	BOU	52 min
Jun 21, 2:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	23 min
Jun 21, 2:36 PM MDT	Severe Thunderstorm Warning	BOU	19 min
Jun 21, 2:42 PM MDT	Severe Thunderstorm Warning	BOU	33 min
Jun 21, 2:45 PM MDT	Mesoscale Discussion	SPC	90 min
Jun 21, 3:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	36 min
Jun 21, 3:24 PM MDT	Flash Flood Warning	BOU	3 hr
Jun 21, 3:33 PM MDT	Tornado Warning	BOU	27 min
Jun 21, 3:51 PM MDT	Tornado Warning Tornado observed	BOU	24 min
Jun 21, 3:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	37 min
Jun 21, 4:02 PM MDT	Areal Flood Advisory	BOU	3 hr
Jun 21, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jun 21, 5:13 PM MDT	Tornado Warning	BOU	17 min
Jun 21, 5:25 PM MDT	Tornado Warning	BOU	20 min
Jun 21, 5:41 PM MDT	Tornado Warning	BOU	19 min
Jun 21, 5:54 PM MDT	Severe Thunderstorm Warning	BOU	36 min
Jun 21, 6:19 PM MDT	Flash Flood Warning	BOU	3 hr
Jun 21, 6:23 PM MDT	Tornado Warning	BOU	22 min
Jun 21, 9:33 PM MDT	Areal Flood Warning	BOU	6 hr
Jun 22, 11:08 AM MDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 12:14 PM MDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 22, 1:35 PM MDT	Areal Flood Advisory	BOU	17 hr
Jun 22, 7:51 PM MDT	River Flood Watch	BOU	37 hr
Jun 22, 7:52 PM MDT	River Flood Watch	BOU	13 hr
Jun 23, 6:49 PM MDT	Flood Watch	BOU	6 hr
Jun 23, 7:51 PM MDT	Mesoscale Discussion	SPC	54 min
Jun 23, 8:10 PM MDT	Severe Thunderstorm Warning	BOU	50 min
Jun 23, 8:20 PM MDT	Severe Thunderstorm Warning	BOU	25 min
Jun 23, 8:38 PM MDT	Tornado Warning	BOU	22 min
Jun 23, 8:49 PM MDT	Tornado Warning	BOU	26 min
Jun 23, 9:13 PM MDT	Tornado Warning	BOU	17 min
Jun 23, 9:23 PM MDT	Tornado Warning	BOU	37 min
Jun 23, 9:27 PM MDT	Severe Thunderstorm Warning	BOU	48 min
Jun 23, 9:34 PM MDT	Flash Flood Warning	BOU	3 hr
Jun 23, 9:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	36 min
Jun 23, 10:30 PM MDT	Severe Thunderstorm Warning	BOU	30 min
Jun 24, 12:30 AM MDT	Areal Flood Advisory	BOU	41 hr
Jun 24, 8:45 AM MDT	River Flood Warning	BOU	24 hr
Jun 24, 8:46 AM MDT	River Flood Advisory	BOU	3 days
Jun 25, 8:35 AM MDT	River Flood Advisory	BOU	27 hr
Jun 26, 8:05 PM MDT	Mesoscale Discussion	SPC	115 min
Jun 26, 8:18 PM MDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 26, 8:55 PM MDT	Severe Thunderstorm Warning	BOU	50 min
Jun 26, 9:15 PM MDT	Tornado Warning	BOU	30 min
Jun 26, 10:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	64 min
Jun 27, 2:34 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 27, 4:32 PM MDT	Mesoscale Discussion	SPC	88 min
Jun 28, 6:37 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jun 28, 6:44 PM MDT	Tornado Warning Tornado observed	BOU	31 min
Jun 28, 7:05 PM MDT	Special Weather Statement	BOU	25 min
Jun 28, 7:08 PM MDT	Tornado Warning	BOU	37 min
Jun 28, 7:34 PM MDT	Severe Thunderstorm Warning	BOU	41 min
Jun 28, 7:59 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 28, 8:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	43 min
Jun 28, 8:36 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jun 28, 8:39 PM MDT	Areal Flood Advisory	BOU	3 hr
Jun 28, 8:39 PM MDT	Mesoscale Discussion	SPC	66 min
Jun 28, 8:51 PM MDT	Severe Thunderstorm Warning	BOU	24 min
Jun 28, 9:03 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 28, 9:04 PM MDT	Severe Thunderstorm Warning	BOU	41 min
Jun 28, 9:19 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BOU	41 min
Jun 28, 9:43 PM MDT	Flash Flood Warning	BOU	3 hr
Jun 28, 9:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	34 min
Jun 28, 10:07 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jun 28, 11:01 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 29, 1:17 PM MDT	Tornado Watch	SPC	8 hr
Jun 29, 4:12 PM MDT	Mesoscale Discussion	SPC	93 min
Jul 4, 2:05 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 4, 3:40 PM MDT	Special Weather Statement	BOU	35 min
Jul 4, 5:14 PM MDT	Mesoscale Discussion	SPC	91 min
Jul 4, 8:34 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 5, 8:08 PM MDT	Special Weather Statement	BOU	37 min
Jul 5, 8:46 PM MDT	Special Weather Statement	BOU	44 min
Jul 6, 2:51 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 8, 12:23 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 8, 1:09 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 8, 1:16 PM MDT	Severe Thunderstorm Warning	BOU	29 min
Jul 8, 1:59 PM MDT	Severe Thunderstorm Warning	BOU	31 min
Jul 8, 4:18 PM MDT	Mesoscale Discussion	SPC	117 min
Jul 8, 4:42 PM MDT	Special Weather Statement	BOU	48 min
Jul 8, 4:58 PM MDT	Areal Flood Advisory	BOU	3 hr
Jul 10, 12:47 PM MDT	Mesoscale Discussion	SPC	118 min
Jul 10, 1:37 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 13, 1:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 13, 1:49 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 13, 4:44 PM MDT	Severe Thunderstorm Warning	BOU	46 min
Jul 13, 4:51 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BOU	39 min
Jul 14, 1:42 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 20, 9:28 AM MDT	Severe Thunderstorm Warning	BOU	47 min
Jul 20, 9:47 AM MDT	Areal Flood Advisory	BOU	3 hr
Jul 20, 10:10 AM MDT	Severe Thunderstorm Warning	BOU	50 min
Jul 20, 10:49 AM MDT	Special Weather Statement	BOU	41 min
Jul 20, 12:15 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 1:27 PM MDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 20, 4:19 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 21, 6:01 PM MDT	Severe Thunderstorm Warning	BOU	44 min
Jul 21, 6:39 PM MDT	Severe Thunderstorm Warning	BOU	51 min
Jul 21, 7:11 PM MDT	Severe Thunderstorm Warning	BOU	34 min
Jul 25, 4:34 PM MDT	Mesoscale Discussion	SPC	86 min
Jul 26, 2:37 PM MDT	Mesoscale Discussion	SPC	113 min
Jul 31, 2:37 PM MDT	Flood Watch	BOU	32 hr
Aug 1, 2:33 PM MDT	Mesoscale Discussion	SPC	87 min
Aug 1, 6:49 PM MDT	Mesoscale Discussion	SPC	86 min
Aug 2, 2:31 PM MDT	Special Weather Statement	BOU	44 min
Aug 2, 2:36 PM MDT	Severe Thunderstorm Warning	BOU	24 min
Aug 2, 3:18 PM MDT	Special Weather Statement	BOU	42 min
Aug 2, 3:24 PM MDT	Severe Thunderstorm Warning	BOU	51 min
Aug 2, 3:34 PM MDT	Areal Flood Advisory	BOU	3 hr
Aug 3, 2:13 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 2:57 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 3, 6:08 PM MDT	Severe Thunderstorm Warning	BOU	52 min
Aug 3, 6:42 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 6:55 PM MDT	Severe Thunderstorm Warning	BOU	50 min
Aug 3, 7:39 PM MDT	Severe Thunderstorm Warning	BOU	51 min
Aug 3, 7:50 PM MDT	Severe Thunderstorm Warning	BOU	25 min
Aug 3, 8:14 PM MDT	Special Weather Statement	BOU	46 min
Aug 4, 4:53 PM MDT	Severe Thunderstorm Warning	BOU	37 min
Aug 4, 5:24 PM MDT	Severe Thunderstorm Warning	BOU	36 min
Aug 5, 12:44 PM MDT	Mesoscale Discussion	SPC	3 hr
Aug 5, 4:09 PM MDT	Severe Thunderstorm Warning	BOU	36 min
Aug 5, 4:49 PM MDT	Severe Thunderstorm Warning	BOU	41 min
Aug 7, 1:14 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 2:03 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 7, 2:26 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	49 min
Aug 7, 2:57 PM MDT	Severe Thunderstorm Warning	BOU	26 min
Aug 8, 1:24 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 2:37 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 8, 2:58 PM MDT	Special Weather Statement	BOU	32 min
Aug 8, 3:03 PM MDT	Severe Thunderstorm Warning	BOU	42 min
Aug 8, 3:23 PM MDT	Areal Flood Advisory	BOU	3 hr
Aug 8, 5:12 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 5:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	20 min
Aug 8, 6:01 PM MDT	Severe Thunderstorm Warning	BOU	44 min
Aug 10, 2:14 PM MDT	Mesoscale Discussion	SPC	3 hr
Aug 12, 12:07 PM MDT	Special Weather Statement	BOU	23 min
Aug 12, 12:34 PM MDT	Special Weather Statement	BOU	26 min
Aug 12, 1:01 PM MDT	Special Weather Statement	BOU	29 min
Aug 12, 1:12 PM MDT	Areal Flood Advisory	BOU	3 hr
Aug 21, 2:44 AM MDT	Heat Advisory	BOU	17 hr
Aug 21, 2:53 AM MDT	Red Flag Warning	BOU	16 hr
Aug 22, 3:28 AM MDT	Heat Advisory	BOU	17 hr
Aug 24, 1:53 PM MDT	Flood Watch	BOU	30 hr
Aug 25, 7:59 AM MDT	Areal Flood Advisory	BOU	3 hr
Oct 2, 1:41 PM MDT	Mesoscale Discussion	SPC	2 hr
Oct 5, 2:04 PM MDT	Freeze Watch	BOU	13 hr
Oct 6, 2:54 AM MDT	Freeze Warning	BOU	30 hr
Oct 11, 2:16 AM MDT	High Wind Watch	BOU	35 hr
Oct 12, 1:12 PM MDT	Freeze Watch	BOU	15 hr
Oct 13, 4:06 AM MDT	Freeze Warning	BOU	29 hr
Oct 27, 2:22 PM MDT	Winter Weather Advisory	BOU	46 hr
Nov 12, 12:55 PM MST	Red Flag Warning	BOU	28 hr
Nov 22, 1:59 PM MST	Winter Weather Advisory	BOU	63 hr
Dec 22, 8:49 PM MST	Winter Weather Advisory	BOU	38 hr
Dec 24, 8:28 PM MST	High Wind Watch	BOU	6 hr
Dec 25, 1:58 AM MST	High Wind Warning	BOU	43 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	56
Tornado Warning	15
Severe Thunderstorm Watch	17
Tornado Watch	3
Mesoscale Discussion	48
Special Weather Statement	28
Flooding
Areal Flood Warning	1
Flash Flood Warning	4
River Flood Warning	2
Flood Watch	5
River Flood Watch	2
Areal Flood Advisory	18
River Flood Advisory	5
Winter
Winter Storm Warning	3
Winter Storm Watch	1
Winter Weather Advisory	8
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Wind Chill Warning	1
Freeze Watch	2
Wind Chill Advisory	3
Wind and dust
High Wind Warning	1
High Wind Watch	2
Fire
Red Flag Warning	4
Fire Weather Watch	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 2022 2024

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.