Severe Thunderstorm Warnings in Yuma County, Colorado

1,503 severe thunderstorm warnings since 1986. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Yuma County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Severe Thunderstorm Warnings: 1,503
Busiest year: 2016105 severe thunderstorm warnings
Average year: 37over 41 years on file

Over time

By year

Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.

Warning verification

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

From 2008 to 2025, 72% of hail, wind and damage reports in Yuma County fell inside a severe thunderstorm warning issued on average 26 minutes before, and 60% of the severe thunderstorm warnings had no report inside them.

Severe thunderstorm warnings by year

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
2008	53	19	64%	46	39%	22 min
2009	60	30	50%	43	86%	30 min
2010	38	15	61%	43	60%	26 min
2011	47	23	51%	16	69%	20 min
2012	23	4	83%	4	75%	25 min
2013	40	15	63%	17	76%	21 min
2014	59	20	66%	29	66%	27 min
2015	42	10	76%	12	67%	20 min
2016	106	23	78%	29	76%	25 min
2017	46	17	63%	15	80%	22 min
2018	77	25	68%	58	71%	26 min
2019	47	26	45%	52	65%	18 min
2020	53	25	53%	53	81%	31 min
2021	24	8	67%	16	69%	19 min
2022	21	9	57%	24	88%	36 min
2023	66	36	45%	89	70%	28 min
2024	68	38	44%	75	91%	27 min
2025	74	33	55%	60	63%	22 min

Years from 2008, the first full year of storm-based warnings. The year still running is on its own page.

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 latest severe thunderstorm warnings

The most recent on file, newest first.

Issued	Product	Office	Lasted
Sep 20, 2:03 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GLD	42 min
Aug 9, 9:48 PM MDT	Severe Thunderstorm Warning	GLD	42 min
Jul 28, 5:43 PM MDT	Severe Thunderstorm Warning	GLD	43 min
Jul 22, 6:10 PM MDT	Severe Thunderstorm Warning	GLD	35 min
Jul 9, 6:44 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GLD	46 min
Jul 9, 5:59 PM MDT	Severe Thunderstorm Warning	GLD	61 min
Jul 8, 9:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GLD	37 min
Jul 8, 7:12 PM MDT	Severe Thunderstorm Warning	GLD	33 min
Jul 4, 6:40 PM MDT	Severe Thunderstorm Warning	GLD	45 min
Jul 4, 5:58 PM MDT	Severe Thunderstorm Warning	GLD	62 min
Jul 4, 2:12 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GLD	48 min
Jul 4, 1:31 AM MDT	Severe Thunderstorm Warning Considerable damage threat	GLD	44 min

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive

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.