Severe Thunderstorm Warnings in Clark County, Kansas

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

Clark County and its neighbors

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

Severe Thunderstorm Warnings: 862
Busiest year: 201850 severe thunderstorm warnings
Average year: 22over 40 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, 82% of hail, wind and damage reports in Clark County fell inside a severe thunderstorm warning issued on average 24 minutes before, and 43% 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	21	16	24%	4	75%	10 min
2009	27	21	22%	10	90%	14 min
2010	8	7	13%	4	75%	35 min
2011	13	7	46%	2	50%	2 min
2012	29	19	34%	15	80%	26 min
2013	37	25	32%	19	79%	24 min
2014	34	26	24%	13	85%	32 min
2015	17	13	24%	4	100%	37 min
2016	28	13	54%	15	73%	21 min
2017	36	17	53%	15	67%	18 min
2018	50	29	42%	9	89%	18 min
2019	38	17	55%	11	82%	19 min
2020	31	12	61%	15	100%	33 min
2021	15	5	67%	5	40%	19 min
2022	22	7	68%	5	100%	22 min
2023	21	15	29%	11	82%	26 min
2024	40	21	48%	9	67%	30 min
2025	33	14	58%	19	95%	24 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 12, 6:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DDC	50 min
Sep 12, 5:50 PM CDT	Severe Thunderstorm Warning	DDC	40 min
Aug 13, 6:42 PM CDT	Severe Thunderstorm Warning	DDC	21 min
Aug 6, 8:28 PM CDT	Severe Thunderstorm Warning	DDC	17 min
Aug 6, 7:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DDC	38 min
Aug 6, 7:13 PM CDT	Severe Thunderstorm Warning	DDC	47 min
Jul 23, 9:09 PM CDT	Severe Thunderstorm Warning	DDC	51 min
Jul 23, 8:33 PM CDT	Severe Thunderstorm Warning	DDC	42 min
Jun 21, 10:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DDC	31 min
Jun 21, 10:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DDC	47 min
Jun 21, 9:23 PM CDT	Severe Thunderstorm Warning	DDC	52 min
Jun 20, 11:54 PM CDT	Severe Thunderstorm Warning	DDC	51 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.