Alert archive / Illinois / Winnebago County

Weather alerts in Winnebago County, Illinois, 2024

182 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Winnebago County and its neighbors

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

Alerts: 182
Warnings: 54
Watches: 40
Advisories: 36
Busiest month: July38 alerts
Busiest day: July 15, 202417 alerts

Over time

By month

Warning verification

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

1 of 2 tornado warnings covering Winnebago County in 2024 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 4 minutes after it went out.

Winnebago County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	1	100%	4 min
Severe thunderstorm warnings	17	10	41%	30	83%	33 min
Flash flood warnings	5	3	40%	40	95%	97 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Chicago, IL: tornado warnings	34	20	41%	58	69%	17 min
NWS Chicago, IL: severe thunderstorm warnings	155	88	43%	549	79%	30 min
NWS Chicago, IL: flash flood warnings	22	6	73%	72	72%	85 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
Jan 7, 1:55 PM CST	Winter Storm Watch	LOT	24 hr
Jan 8, 3:00 AM CST	Winter Weather Advisory	LOT	47 hr
Jan 8, 2:07 PM CST	Winter Storm Warning	LOT	36 hr
Jan 9, 9:12 AM CST	Mesoscale Discussion	SPC	3 hr
Jan 9, 1:09 PM CST	Mesoscale Discussion	SPC	3 hr
Jan 10, 2:18 PM CST	Winter Storm Watch	LOT	24 hr
Jan 11, 2:22 PM CST	Winter Storm Warning	LOT	37 hr
Jan 12, 4:23 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 12, 9:31 AM CST	Winter Weather Advisory	LOT	26 hr
Jan 12, 10:24 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 13, 3:29 AM CST	Wind Chill Advisory	LOT	4 days
Jan 13, 2:17 PM CST	Wind Chill Warning	LOT	70 hr
Jan 13, 2:17 PM CST	Winter Weather Advisory	LOT	20 hr
Jan 18, 3:41 AM CST	Winter Weather Advisory	LOT	26 hr
Jan 19, 3:28 AM CST	Wind Chill Advisory	LOT	30 hr
Jan 20, 2:44 AM CST	Wind Chill Advisory	LOT	31 hr
Jan 21, 2:42 PM CST	Winter Weather Advisory	LOT	42 hr
Jan 22, 3:21 AM CST	Winter Weather Advisory	LOT	33 hr
Jan 23, 1:57 PM CST	Dense Fog Advisory	LOT	22 hr
Jan 24, 2:57 PM CST	Dense Fog Advisory	LOT	30 hr
Jan 26, 1:22 PM CST	Dense Fog Advisory	LOT	33 hr
Jan 29, 5:12 AM CST	Dense Fog Advisory	LOT	6 hr
Feb 6, 1:34 AM CST	Dense Fog Advisory	LOT	10 hr
Feb 6, 9:08 PM CST	Dense Fog Advisory	LOT	12 hr
Feb 8, 2:53 PM CST	Mesoscale Discussion	SPC	3 hr
Feb 8, 5:49 PM CST	Special Weather Statement	LOT	11 min
Feb 25, 1:13 PM CST	Fire Weather Watch	LOT	14 hr
Feb 26, 3:05 AM CST	Red Flag Warning	LOT	15 hr
Feb 27, 2:35 PM CST	Wind Advisory	LOT	15 hr
Feb 27, 2:50 PM CST	Mesoscale Discussion	SPC	115 min
Feb 27, 3:53 PM CST	Tornado Watch	SPC	6 hr
Feb 27, 7:17 PM CST	Severe Thunderstorm Warning	LOT	43 min
Feb 27, 7:29 PM CST	Severe Thunderstorm Warning	LOT	46 min
Mar 3, 2:13 PM CST	Wind Advisory	LOT	4 hr
Mar 4, 1:25 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 4, 2:34 PM CST	Severe Thunderstorm Warning	LOT	41 min
Mar 21, 3:30 AM CDT	Winter Weather Advisory	LOT	37 hr
Mar 22, 8:08 AM CDT	Winter Storm Warning	LOT	8 hr
Apr 2, 9:43 AM CDT	River Flood Watch	MKX	11 hr
Apr 2, 9:56 AM CDT	River Flood Watch	LOT	26 hr
Apr 2, 10:01 AM CDT	River Flood Watch	LOT	27 hr
Apr 2, 10:09 AM CDT	River Flood Watch	LOT	24 hr
Apr 2, 10:09 AM CDT	River Flood Watch	LOT	25 hr
Apr 2, 10:09 AM CDT	River Flood Watch	LOT	25 hr
Apr 2, 3:52 PM CDT	Winter Weather Advisory	LOT	19 hr
Apr 2, 9:12 PM CDT	River Flood Warning	MKX	4 days
Apr 3, 9:54 AM CDT	River Flood Watch	MKX	53 hr
Apr 3, 10:35 AM CDT	River Flood Warning	LOT	8 days
Apr 3, 10:40 AM CDT	River Flood Warning	LOT	7 days
Apr 3, 11:48 AM CDT	River Flood Warning	LOT	21 days
Apr 3, 1:15 PM CDT	River Flood Warning	LOT	46 hr
Apr 5, 3:23 PM CDT	River Flood Warning	MKX	21 days
Apr 16, 3:40 PM CDT	Mesoscale Discussion	SPC	95 min
Apr 16, 5:52 PM CDT	Tornado Watch	SPC	4 hr
Apr 16, 7:32 PM CDT	Mesoscale Discussion	SPC	88 min
Apr 16, 8:33 PM CDT	Severe Thunderstorm Warning	LOT	57 min
Apr 20, 2:41 PM CDT	Freeze Warning	LOT	17 hr
Apr 21, 2:29 PM CDT	Frost Advisory	LOT	18 hr
Apr 23, 2:52 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 24, 2:41 AM CDT	Freeze Watch	LOT	12 hr
Apr 24, 2:58 PM CDT	Freeze Warning	LOT	17 hr
Apr 27, 3:26 PM CDT	Special Weather Statement	LOT	49 min
Apr 27, 7:58 PM CDT	Mesoscale Discussion	SPC	62 min
May 4, 3:48 PM CDT	Special Weather Statement	LOT	27 min
May 4, 4:27 PM CDT	Severe Thunderstorm Warning	LOT	48 min
May 7, 1:28 PM CDT	Tornado Watch	SPC	12 hr
May 7, 2:03 PM CDT	Severe Thunderstorm Warning	LOT	27 min
May 7, 2:28 PM CDT	Areal Flood Advisory	LOT	3 hr
May 20, 10:13 AM CDT	Mesoscale Discussion	SPC	92 min
May 20, 12:39 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
May 21, 7:13 PM CDT	Tornado Watch	SPC	5 hr
May 21, 7:56 PM CDT	Mesoscale Discussion	SPC	64 min
May 21, 8:32 PM CDT	Special Weather Statement	LOT	28 min
May 21, 8:36 PM CDT	Severe Thunderstorm Warning	LOT	20 min
May 21, 10:28 PM CDT	Severe Thunderstorm Warning	LOT	47 min
May 24, 6:07 AM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 24, 8:44 AM CDT	Mesoscale Discussion	SPC	2 hr
May 24, 9:37 AM CDT	Special Weather Statement	LOT	38 min
May 24, 4:07 PM CDT	Special Weather Statement	LOT	68 min
May 24, 4:46 PM CDT	Mesoscale Discussion	SPC	119 min
May 24, 6:01 PM CDT	Special Weather Statement	LOT	29 min
May 26, 3:26 PM CDT	Mesoscale Discussion	SPC	94 min
May 28, 1:02 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 3, 2:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 2:52 PM CDT	Special Weather Statement	LOT	23 min
Jun 3, 9:49 PM CDT	River Flood Watch	MKX	7 hr
Jun 3, 11:25 PM CDT	River Flood Warning	MKX	15 days
Jun 13, 6:13 AM CDT	Special Weather Statement	LOT	32 min
Jun 13, 6:31 AM CDT	Special Weather Statement	LOT	29 min
Jun 16, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 16, 3:30 PM CDT	Special Weather Statement	LOT	15 min
Jun 16, 3:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 16, 3:49 PM CDT	Severe Thunderstorm Warning	LOT	41 min
Jun 19, 3:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 20, 10:51 AM CDT	River Flood Warning	MKX	37 days
Jun 22, 9:22 AM CDT	River Flood Watch	MKX	26 hr
Jun 22, 12:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 22, 7:37 PM CDT	Flood Watch	LOT	5 hr
Jun 22, 8:09 PM CDT	Severe Thunderstorm Warning	LOT	51 min
Jun 22, 8:54 PM CDT	Areal Flood Advisory	LOT	31 min
Jun 22, 9:13 PM CDT	Flash Flood Warning	LOT	4 hr
Jun 22, 9:42 PM CDT	Severe Thunderstorm Warning	LOT	33 min
Jun 22, 9:43 PM CDT	Severe Thunderstorm Warning	LOT	32 min
Jun 23, 1:18 AM CDT	Areal Flood Warning	LOT	9 hr
Jun 23, 8:55 AM CDT	River Flood Warning	LOT	21 days
Jun 23, 8:59 AM CDT	River Flood Warning	LOT	21 days
Jun 23, 9:20 AM CDT	River Flood Watch	LOT	26 hr
Jun 23, 11:18 AM CDT	River Flood Warning	MKX	64 hr
Jun 24, 5:06 PM CDT	River Flood Warning	MKX	23 hr
Jun 24, 7:31 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 25, 4:09 AM CDT	Mesoscale Discussion	SPC	96 min
Jun 25, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 25, 5:20 AM CDT	Severe Thunderstorm Warning	LOT	27 min
Jun 25, 5:59 AM CDT	Special Weather Statement	LOT	31 min
Jun 25, 6:28 AM CDT	Mesoscale Discussion	SPC	92 min
Jun 25, 4:52 PM CDT	Flood Watch	LOT	4 hr
Jun 25, 4:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jul 2, 6:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 7:30 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 13, 10:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jul 13, 10:13 PM CDT	Special Weather Statement	LOT	47 min
Jul 13, 10:23 PM CDT	Severe Thunderstorm Warning	LOT	37 min
Jul 13, 10:49 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 13, 10:59 PM CDT	Flash Flood Warning	LOT	5 hr
Jul 14, 12:01 AM CDT	Flash Flood Warning	LOT	4 hr
Jul 14, 2:19 AM CDT	Flood Watch	LOT	9 hr
Jul 14, 3:44 AM CDT	Areal Flood Warning	LOT	6 hr
Jul 14, 6:12 AM CDT	Special Weather Statement	LOT	48 min
Jul 14, 10:46 AM CDT	Areal Flood Advisory	LOT	6 hr
Jul 14, 3:03 PM CDT	Flood Watch	LOT	11 hr
Jul 14, 3:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 14, 5:55 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 14, 7:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jul 14, 8:02 PM CDT	Flash Flood Warning	LOT	4 hr
Jul 14, 8:25 PM CDT	Severe Thunderstorm Warning	LOT	80 min
Jul 14, 11:56 PM CDT	Areal Flood Warning	LOT	6 hr
Jul 15, 6:56 AM CDT	River Flood Warning	LOT	8 days
Jul 15, 6:58 AM CDT	River Flood Warning	LOT	8 days
Jul 15, 7:00 AM CDT	River Flood Warning	LOT	49 hr
Jul 15, 8:57 AM CDT	River Flood Warning	MKX	5 days
Jul 15, 11:04 AM CDT	River Flood Watch	LOT	34 hr
Jul 15, 11:11 AM CDT	River Flood Watch	LOT	44 hr
Jul 15, 12:52 PM CDT	Flood Watch	LOT	14 hr
Jul 15, 1:59 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 15, 3:18 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 15, 5:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 15, 6:06 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 15, 6:53 PM CDT	Tornado Watch	SPC	6 hr
Jul 15, 6:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 15, 7:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	75 min
Jul 15, 7:54 PM CDT	Tornado Warning	LOT	36 min
Jul 15, 8:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	74 min
Jul 15, 8:11 PM CDT	Flash Flood Warning	LOT	3 hr
Jul 16, 8:57 PM CDT	River Flood Warning	LOT	6 days
Jul 22, 1:58 PM CDT	Areal Flood Advisory	LOT	3 hr
Aug 5, 5:09 PM CDT	Mesoscale Discussion	SPC	66 min
Aug 5, 5:52 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 5, 7:44 PM CDT	Tornado Warning	LOT	31 min
Aug 16, 1:53 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 16, 5:31 PM CDT	Mesoscale Discussion	SPC	119 min
Aug 16, 5:33 PM CDT	Special Weather Statement	LOT	42 min
Aug 24, 2:32 PM CDT	Excessive Heat Watch	LOT	48 hr
Aug 25, 3:35 AM CDT	Heat Advisory	LOT	40 hr
Aug 25, 2:13 PM CDT	Excessive Heat Warning	LOT	54 hr
Aug 27, 11:25 AM CDT	Mesoscale Discussion	SPC	3 hr
Aug 27, 12:04 PM CDT	Severe Thunderstorm Watch	SPC	2 hr
Aug 27, 4:47 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 27, 5:09 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 25, 12:23 AM CDT	Dense Fog Advisory	LOT	9 hr
Oct 14, 1:24 PM CDT	Freeze Watch	LOT	14 hr
Oct 15, 3:29 AM CDT	Freeze Warning	LOT	30 hr
Oct 16, 1:54 PM CDT	Freeze Warning	LOT	19 hr
Oct 30, 3:06 PM CDT	Wind Advisory	LOT	31 hr
Nov 17, 10:55 PM CST	Dense Fog Advisory	LOT	7 hr
Nov 21, 3:59 AM CST	Wind Advisory	LOT	10 hr
Dec 4, 2:19 AM CST	Wind Advisory	LOT	22 hr
Dec 14, 2:22 AM CST	Winter Weather Advisory	LOT	16 hr
Dec 15, 2:48 AM CST	Dense Fog Advisory	LOT	9 hr
Dec 15, 3:12 PM CST	Dense Fog Advisory	LOT	20 hr
Dec 26, 5:14 AM CST	Dense Fog Advisory	LOT	16 hr
Dec 30, 5:23 AM CST	Dense Fog Advisory	LOT	7 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	17
Tornado Warning	2
Severe Thunderstorm Watch	12
Tornado Watch	5
Mesoscale Discussion	37
Special Weather Statement	15
Flooding
Areal Flood Warning	3
Flash Flood Warning	5
River Flood Warning	17
Flood Watch	5
River Flood Watch	12
Areal Flood Advisory	5
Winter
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	9
Heat
Excessive Heat Warning	1
Excessive Heat Watch	1
Heat Advisory	1
Cold
Freeze Warning	4
Wind Chill Warning	1
Freeze Watch	2
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
Wind Advisory	5
Fire
Red Flag Warning	1
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	12

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.