Severe Thunderstorm Warnings in Harvey County, Kansas

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

Harvey County and its neighbors

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

Severe Thunderstorm Warnings: 696
Busiest year: 201649 severe thunderstorm warnings
Average year: 17over 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, 82% of hail, wind and damage reports in Harvey County fell inside a severe thunderstorm warning issued on average 24 minutes before, and 33% 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	25	19	24%	8	63%	16 min
2009	37	22	41%	17	82%	15 min
2010	17	12	29%	6	33%	20 min
2011	33	24	27%	19	100%	18 min
2012	19	10	47%	9	89%	27 min
2013	19	15	21%	11	91%	29 min
2014	21	14	33%	4	75%	48 min
2015	17	11	35%	10	90%	31 min
2016	49	32	35%	24	79%	21 min
2017	12	11	8%	14	64%	23 min
2018	13	7	46%	1	0%
2019	45	30	33%	16	81%	31 min
2020	9	3	67%	3	0%
2021	14	8	43%	14	71%	24 min
2022	23	11	52%	14	79%	16 min
2023	21	15	29%	16	88%	28 min
2024	24	20	17%	31	94%	27 min
2025	33	25	24%	29	93%	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
Aug 14, 8:36 PM CDT	Severe Thunderstorm Warning	ICT	24 min
Jul 4, 1:11 PM CDT	Severe Thunderstorm Warning	ICT	34 min
Jul 4, 9:16 AM CDT	Severe Thunderstorm Warning	ICT	44 min
Jul 4, 8:53 AM CDT	Severe Thunderstorm Warning	ICT	67 min
Jul 4, 8:28 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ICT	47 min
Jun 21, 12:40 AM CDT	Severe Thunderstorm Warning Destructive damage threat	ICT	35 min
Jun 21, 12:32 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ICT	73 min
Jun 19, 7:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ICT	62 min
Jun 18, 7:02 AM CDT	Severe Thunderstorm Warning	ICT	21 min
Jun 10, 11:17 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ICT	37 min
Jun 10, 10:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ICT	61 min
Jun 8, 10:09 PM CDT	Severe Thunderstorm Warning	ICT	57 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.