Alert archive / Illinois / Whiteside County / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Whiteside County, Illinois, 2024

45 severe thunderstorm warnings in 2024. An alert counts here when it covered this county. The archive of severe thunderstorm warnings reaches back to 1986.

Whiteside County and its neighbors

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

Severe Thunderstorm Warnings: 45
Busiest month: May11 severe thunderstorm warnings
Busiest day: July 15, 20248 severe thunderstorm warnings

Over time

By month

Warning verification

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

31 of 45 severe thunderstorm warnings covering Whiteside County in 2024 had a qualifying storm report inside them; 14 of 18 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.

Whiteside County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Severe thunderstorm warnings	45	31	31%	18	78%	23 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Quad Cities, IA: severe thunderstorm warnings	364	205	44%	646	82%	25 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Feb 27, 4:32 PM CST	Severe Thunderstorm Warning	DVN	43 min
Feb 27, 4:55 PM CST	Severe Thunderstorm Warning	DVN	50 min
Feb 27, 5:13 PM CST	Severe Thunderstorm Warning	DVN	47 min
Mar 4, 1:54 PM CST	Severe Thunderstorm Warning	DVN	51 min
Mar 4, 2:43 PM CST	Severe Thunderstorm Warning	DVN	47 min
Mar 4, 3:13 PM CST	Severe Thunderstorm Warning	DVN	47 min
Mar 4, 3:52 PM CST	Severe Thunderstorm Warning	DVN	38 min
Mar 4, 4:17 PM CST	Severe Thunderstorm Warning	DVN	43 min
Apr 16, 6:22 PM CDT	Severe Thunderstorm Warning	DVN	23 min
Apr 16, 6:42 PM CDT	Severe Thunderstorm Warning	DVN	48 min
Apr 16, 7:40 PM CDT	Severe Thunderstorm Warning	DVN	50 min
Apr 16, 8:02 PM CDT	Severe Thunderstorm Warning	DVN	43 min
May 4, 3:37 PM CDT	Severe Thunderstorm Warning	DVN	38 min
May 7, 12:29 PM CDT	Severe Thunderstorm Warning	DVN	30 min
May 21, 6:55 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	50 min
May 21, 7:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	45 min
May 21, 7:27 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	48 min
May 21, 7:45 PM CDT	Severe Thunderstorm Warning	DVN	28 min
May 24, 7:32 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	58 min
May 24, 8:26 AM CDT	Severe Thunderstorm Warning	DVN	64 min
May 24, 8:43 AM CDT	Severe Thunderstorm Warning	DVN	47 min
May 27, 5:40 PM CDT	Severe Thunderstorm Warning	DVN	50 min
May 27, 6:19 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Jun 16, 1:54 PM CDT	Severe Thunderstorm Warning	DVN	66 min
Jun 16, 2:32 PM CDT	Severe Thunderstorm Warning	DVN	44 min
Jun 16, 2:45 PM CDT	Severe Thunderstorm Warning	DVN	60 min
Jun 22, 10:24 PM CDT	Severe Thunderstorm Warning	DVN	51 min
Jun 25, 5:27 AM CDT	Severe Thunderstorm Warning	DVN	48 min
Jun 25, 5:42 AM CDT	Severe Thunderstorm Warning	DVN	48 min
Jun 25, 5:48 AM CDT	Severe Thunderstorm Warning	DVN	42 min
Jun 25, 6:27 AM CDT	Severe Thunderstorm Warning	DVN	48 min
Jun 25, 5:22 PM CDT	Severe Thunderstorm Warning	DVN	38 min
Jun 25, 6:03 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Jul 2, 6:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	46 min
Jul 2, 7:18 PM CDT	Severe Thunderstorm Warning	DVN	29 min
Jul 14, 7:03 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Jul 14, 8:08 PM CDT	Severe Thunderstorm Warning	DVN	52 min
Jul 14, 8:45 PM CDT	Severe Thunderstorm Warning	DVN	45 min
Jul 14, 8:49 PM CDT	Severe Thunderstorm Warning	DVN	41 min
Jul 14, 10:21 PM CDT	Severe Thunderstorm Warning	DVN	39 min
Jul 14, 10:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	49 min
Jul 14, 10:54 PM CDT	Severe Thunderstorm Warning	DVN	66 min
Jul 15, 6:42 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	78 min
Jul 15, 7:50 PM CDT	Severe Thunderstorm Warning Destructive damage threat	DVN	55 min
Aug 5, 5:23 PM CDT	Severe Thunderstorm Warning	DVN	23 min

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.