Alert archive / Illinois / Winnebago County

Weather alerts in Winnebago County, Illinois, 2019

230 weather alerts in 2019, 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 2019. Tap one for its archive.

Alerts: 230
Warnings: 52
Watches: 38
Advisories: 89
Busiest month: May40 alerts
Busiest day: September 13, 201910 alerts

Over time

By month

Warning verification

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

Winnebago County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	3	3	0%	9	0%
Flash flood warnings	2	1	50%	1	100%	18 min

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Chicago, IL: tornado warnings	18	3	83%	9	44%	17 min
NWS Chicago, IL: severe thunderstorm warnings	127	72	43%	281	75%	24 min
NWS Chicago, IL: flash flood warnings	23	9	61%	40	57%	110 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 2, 6:04 AM CST	Winter Weather Advisory	LOT	5 hr
Jan 7, 2:10 PM CST	Wind Advisory	LOT	33 hr
Jan 11, 3:15 AM CST	Winter Weather Advisory	LOT	48 hr
Jan 14, 1:45 PM CST	Winter Weather Advisory	LOT	16 hr
Jan 17, 12:13 PM CST	Winter Storm Watch	LOT	15 hr
Jan 18, 3:23 AM CST	Winter Storm Warning	LOT	35 hr
Jan 18, 6:58 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 21, 1:57 PM CST	Winter Weather Advisory	LOT	46 hr
Jan 22, 3:24 AM CST	Winter Storm Warning	LOT	33 hr
Jan 22, 2:36 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 23, 2:20 PM CST	Wind Chill Watch	LOT	13 hr
Jan 23, 3:00 PM CST	Wind Chill Advisory	LOT	45 hr
Jan 26, 3:15 AM CST	Winter Storm Watch	LOT	24 hr
Jan 26, 5:51 AM CST	River Flood Warning	MKX	4 days
Jan 26, 8:37 PM CST	River Flood Advisory	LOT	24 hr
Jan 26, 10:01 PM CST	Wind Chill Advisory	LOT	11 hr
Jan 27, 3:01 AM CST	Winter Storm Warning	LOT	29 hr
Jan 27, 3:01 AM CST	Winter Weather Advisory	LOT	45 hr
Jan 27, 8:10 PM CST	River Flood Warning	LOT	13 hr
Jan 28, 2:42 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 28, 3:01 AM CST	Wind Chill Watch	LOT	11 hr
Jan 28, 1:36 PM CST	Wind Chill Warning	LOT	70 hr
Jan 28, 1:36 PM CST	Wind Chill Advisory	LOT	28 hr
Jan 28, 3:42 PM CST	River Flood Advisory	LOT	68 hr
Jan 29, 8:42 PM CST	River Flood Advisory	LOT	21 days
Feb 2, 10:31 AM CST	River Flood Advisory	LOT	7 days
Feb 2, 7:12 PM CST	Dense Fog Advisory	LOT	6 hr
Feb 3, 8:50 AM CST	Dense Fog Advisory	LOT	15 hr
Feb 3, 8:49 PM CST	River Flood Advisory	LOT	21 days
Feb 3, 8:49 PM CST	River Flood Advisory	LOT	21 days
Feb 3, 8:49 PM CST	River Flood Advisory	LOT	23 hr
Feb 4, 2:05 PM CST	Winter Weather Advisory	LOT	34 hr
Feb 4, 8:03 PM CST	River Flood Warning	LOT	21 days
Feb 5, 3:31 AM CST	Ice Storm Warning	LOT	23 hr
Feb 5, 9:25 AM CST	River Flood Advisory	LOT	13 hr
Feb 5, 1:37 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 5, 5:56 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 5, 9:50 PM CST	River Flood Warning	LOT	10 days
Feb 6, 2:55 AM CST	Winter Weather Advisory	LOT	30 hr
Feb 6, 2:55 AM CST	Winter Weather Advisory	LOT	6 hr
Feb 6, 6:50 AM CST	River Flood Warning	MKX	62 hr
Feb 7, 6:26 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 7, 12:14 PM CST	Winter Weather Advisory	LOT	14 hr
Feb 7, 8:54 PM CST	River Flood Warning	LOT	63 hr
Feb 8, 2:25 AM CST	Wind Chill Advisory	LOT	8 hr
Feb 8, 10:40 AM CST	River Flood Advisory	LOT	48 hr
Feb 8, 10:40 AM CST	River Flood Advisory	LOT	71 hr
Feb 9, 8:07 PM CST	River Flood Advisory	LOT	61 hr
Feb 10, 2:43 PM CST	Winter Weather Advisory	LOT	60 hr
Feb 10, 9:07 PM CST	River Flood Advisory	LOT	71 hr
Feb 11, 9:59 PM CST	Winter Storm Warning	LOT	14 hr
Feb 16, 2:58 PM CST	Winter Weather Advisory	LOT	42 hr
Feb 19, 3:35 AM CST	Winter Weather Advisory	LOT	35 hr
Feb 22, 4:12 AM CST	Winter Weather Advisory	LOT	29 hr
Feb 22, 3:06 PM CST	High Wind Watch	LOT	23 hr
Feb 23, 9:14 AM CST	Areal Flood Advisory	LOT	6 hr
Feb 23, 2:07 PM CST	High Wind Warning	LOT	31 hr
Feb 24, 9:51 AM CST	River Flood Warning	LOT	52 hr
Feb 24, 10:05 AM CST	River Flood Watch	LOT	10 hr
Feb 24, 8:00 PM CST	River Flood Warning	LOT	7 days
Feb 27, 3:32 AM CST	Winter Weather Advisory	LOT	5 hr
Mar 3, 3:11 AM CST	Wind Chill Advisory	LOT	32 hr
Mar 9, 10:32 AM CST	River Flood Watch	LOT	46 hr
Mar 9, 2:29 PM CST	Wind Advisory	LOT	16 hr
Mar 9, 5:09 PM CST	Areal Flood Advisory	LOT	5 hr
Mar 10, 9:46 AM CDT	River Flood Warning	LOT	7 days
Mar 11, 9:43 AM CDT	River Flood Warning	LOT	19 days
Mar 12, 9:29 AM CDT	River Flood Watch	LOT	25 hr
Mar 12, 9:29 AM CDT	River Flood Watch	LOT	21 days
Mar 12, 8:32 PM CDT	River Flood Warning	LOT	20 days
Mar 12, 9:13 PM CDT	River Flood Warning	MKX	7 days
Mar 13, 9:56 AM CDT	Flood Watch	LOT	29 hr
Mar 13, 10:07 AM CDT	River Flood Warning	LOT	21 days
Mar 13, 10:07 AM CDT	River Flood Warning	LOT	21 days
Mar 13, 2:42 PM CDT	Wind Advisory	LOT	31 hr
Mar 13, 9:20 PM CDT	River Flood Warning	MKX	30 days
Apr 10, 2:52 PM CDT	Wind Advisory	LOT	27 hr
Apr 11, 10:59 AM CDT	Special Weather Statement	LOT	31 min
Apr 12, 3:23 AM CDT	Wind Advisory	LOT	17 hr
Apr 14, 11:23 AM CDT	Winter Weather Advisory	LOT	4 hr
Apr 14, 9:39 PM CDT	River Flood Warning	MKX	33 hr
Apr 17, 5:16 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 26, 2:32 PM CDT	Winter Storm Watch	LOT	13 hr
Apr 26, 8:14 PM CDT	Winter Storm Warning	LOT	21 hr
Apr 27, 11:32 AM CDT	Mesoscale Discussion	SPC	6 hr
Apr 27, 5:16 PM CDT	Winter Weather Advisory	LOT	6 hr
Apr 30, 9:01 AM CDT	River Flood Advisory	LOT	3 days
Apr 30, 8:44 PM CDT	River Flood Warning	LOT	4 days
May 1, 9:50 AM CDT	River Flood Advisory	LOT	5 days
May 1, 9:50 AM CDT	River Flood Advisory	LOT	4 days
May 1, 2:14 PM CDT	Flash Flood Watch	LOT	27 hr
May 3, 6:00 AM CDT	Dense Fog Advisory	LOT	3 hr
May 7, 10:58 AM CDT	River Flood Watch	LOT	21 days
May 7, 10:58 AM CDT	River Flood Watch	LOT	21 days
May 9, 9:56 AM CDT	River Flood Advisory	LOT	57 hr
May 9, 9:56 AM CDT	River Flood Advisory	LOT	69 hr
May 9, 9:56 AM CDT	River Flood Advisory	LOT	6 days
May 16, 10:26 AM CDT	Special Weather Statement	LOT	49 min
May 16, 7:14 PM CDT	Mesoscale Discussion	SPC	2 hr
May 19, 11:17 AM CDT	Special Weather Statement	LOT	43 min
May 19, 11:58 AM CDT	Special Weather Statement	LOT	47 min
May 23, 1:55 AM CDT	River Flood Advisory	LOT	17 hr
May 24, 3:33 AM CDT	Flash Flood Watch	LOT	22 hr
May 24, 10:20 AM CDT	Special Weather Statement	LOT	55 min
May 24, 11:16 AM CDT	River Flood Warning	LOT	21 days
May 24, 11:16 AM CDT	River Flood Warning	LOT	21 days
May 24, 11:16 AM CDT	River Flood Warning	LOT	4 days
May 24, 11:16 AM CDT	River Flood Warning	LOT	21 days
May 24, 11:55 AM CDT	River Flood Warning	MKX	4 days
May 24, 6:23 PM CDT	Tornado Watch	SPC	4 hr
May 25, 12:19 AM CDT	Special Weather Statement	LOT	26 min
May 25, 5:04 AM CDT	River Flood Advisory	LOT	28 hr
May 26, 9:15 AM CDT	River Flood Advisory	LOT	25 hr
May 26, 9:15 AM CDT	River Flood Advisory	LOT	25 hr
May 27, 9:26 AM CDT	River Flood Watch	LOT	14 min
May 27, 10:02 AM CDT	River Flood Warning	LOT	14 days
May 27, 10:12 AM CDT	River Flood Warning	LOT	9 hr
May 27, 10:48 AM CDT	River Flood Watch	LOT	9 hr
May 27, 12:50 PM CDT	Mesoscale Discussion	SPC	85 min
May 27, 7:29 PM CDT	River Flood Advisory	LOT	36 hr
May 27, 7:37 PM CDT	River Flood Advisory	LOT	62 hr
May 28, 4:01 AM CDT	Flash Flood Watch	LOT	24 hr
May 30, 1:58 AM CDT	Areal Flood Advisory	LOT	3 hr
May 30, 9:22 AM CDT	River Flood Warning	LOT	4 days
May 30, 9:34 AM CDT	River Flood Advisory	LOT	5 days
May 30, 9:34 AM CDT	River Flood Advisory	LOT	10 hr
May 30, 7:37 PM CDT	River Flood Warning	LOT	31 hr
Jun 1, 7:58 AM CDT	Special Weather Statement	LOT	32 min
Jun 1, 2:05 PM CDT	Mesoscale Discussion	SPC	115 min
Jun 1, 2:23 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 1, 5:21 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 4, 11:46 PM CDT	Special Weather Statement	LOT	29 min
Jun 24, 12:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 25, 1:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 25, 1:52 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 27, 3:27 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 27, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 27, 4:27 PM CDT	Special Weather Statement	LOT	48 min
Jun 30, 11:43 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 30, 12:29 PM CDT	Special Weather Statement	LOT	61 min
Jun 30, 1:13 PM CDT	Severe Thunderstorm Warning	LOT	47 min
Jun 30, 1:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 2:31 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 2, 5:19 PM CDT	Special Weather Statement	LOT	56 min
Jul 2, 6:08 PM CDT	Special Weather Statement	LOT	52 min
Jul 2, 6:25 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 2, 7:48 PM CDT	Flash Flood Warning	LOT	4 hr
Jul 5, 7:54 PM CDT	Special Weather Statement	LOT	51 min
Jul 17, 2:56 AM CDT	Heat Advisory	LOT	48 hr
Jul 17, 2:14 PM CDT	Excessive Heat Warning	LOT	3 days
Jul 18, 6:15 AM CDT	Special Weather Statement	LOT	45 min
Jul 20, 1:59 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 20, 3:29 PM CDT	Special Weather Statement	LOT	31 min
Jul 20, 3:55 PM CDT	Severe Thunderstorm Warning	LOT	65 min
Jul 20, 4:58 PM CDT	Mesoscale Discussion	SPC	62 min
Aug 5, 10:16 PM CDT	Special Weather Statement	LOT	59 min
Aug 5, 11:37 PM CDT	Special Weather Statement	LOT	38 min
Aug 18, 5:44 AM CDT	Mesoscale Discussion	SPC	91 min
Aug 18, 6:06 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 18, 6:31 AM CDT	Special Weather Statement	LOT	44 min
Aug 18, 7:40 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 2, 4:47 AM CDT	Dense Fog Advisory	LOT	3 hr
Sep 3, 6:30 AM CDT	Severe Thunderstorm Warning	LOT	30 min
Sep 11, 12:48 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 11, 3:33 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 12, 10:09 AM CDT	River Flood Watch	LOT	22 hr
Sep 12, 10:14 AM CDT	River Flood Advisory	LOT	36 hr
Sep 12, 1:27 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 12, 6:04 PM CDT	Mesoscale Discussion	SPC	116 min
Sep 12, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 12, 9:44 PM CDT	Special Weather Statement	LOT	46 min
Sep 12, 10:43 PM CDT	Special Weather Statement	LOT	62 min
Sep 12, 10:58 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 12, 11:01 PM CDT	Areal Flood Advisory	LOT	3 hr
Sep 13, 12:11 AM CDT	Areal Flood Advisory	LOT	3 hr
Sep 13, 12:38 AM CDT	Flash Flood Warning	LOT	6 hr
Sep 13, 7:40 AM CDT	River Flood Warning	LOT	41 days
Sep 13, 8:04 AM CDT	River Flood Warning	LOT	60 hr
Sep 13, 8:04 AM CDT	River Flood Warning	LOT	37 hr
Sep 13, 8:13 AM CDT	River Flood Advisory	LOT	51 hr
Sep 14, 2:47 PM CDT	Flash Flood Watch	LOT	19 hr
Sep 14, 9:00 PM CDT	River Flood Advisory	LOT	33 hr
Sep 15, 9:12 PM CDT	Dense Fog Advisory	LOT	13 hr
Sep 17, 8:03 PM CDT	River Flood Advisory	LOT	7 days
Sep 21, 3:35 AM CDT	Flash Flood Watch	LOT	41 hr
Sep 21, 9:22 PM CDT	River Flood Advisory	LOT	24 hr
Sep 21, 9:38 PM CDT	River Flood Watch	LOT	23 hr
Sep 27, 8:00 PM CDT	River Flood Watch	LOT	52 min
Sep 29, 10:01 AM CDT	River Flood Warning	LOT	25 hr
Sep 29, 10:23 AM CDT	River Flood Advisory	LOT	6 days
Sep 30, 1:40 AM CDT	Dense Fog Advisory	LOT	7 hr
Sep 30, 10:57 AM CDT	River Flood Advisory	LOT	21 days
Oct 1, 3:21 AM CDT	Flash Flood Watch	LOT	27 hr
Oct 1, 9:58 AM CDT	River Flood Watch	LOT	21 days
Oct 1, 9:58 AM CDT	River Flood Watch	LOT	21 days
Oct 1, 10:18 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 1, 4:07 PM CDT	River Flood Warning	MKX	7 days
Oct 1, 5:03 PM CDT	Mesoscale Discussion	SPC	117 min
Oct 1, 6:05 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 1, 8:54 PM CDT	Mesoscale Discussion	SPC	96 min
Oct 1, 9:29 PM CDT	Special Weather Statement	LOT	16 min
Oct 1, 10:47 PM CDT	Special Weather Statement	LOT	43 min
Oct 2, 7:55 AM CDT	River Flood Warning	LOT	17 days
Oct 2, 7:55 AM CDT	River Flood Warning	LOT	23 days
Oct 2, 10:40 AM CDT	River Flood Watch	MKX	22 days
Oct 2, 4:36 PM CDT	River Flood Warning	MKX	37 days
Oct 3, 2:10 PM CDT	River Flood Advisory	LOT	16 hr
Oct 4, 6:24 AM CDT	River Flood Warning	LOT	10 hr
Oct 6, 2:53 AM CDT	River Flood Advisory	LOT	5 days
Oct 10, 3:03 PM CDT	Freeze Watch	LOT	13 hr
Oct 11, 3:36 AM CDT	Freeze Warning	LOT	29 hr
Oct 12, 10:28 AM CDT	Wind Advisory	LOT	8 hr
Oct 13, 2:23 PM CDT	Frost Advisory	LOT	18 hr
Oct 21, 8:34 PM CDT	Wind Advisory	LOT	18 hr
Oct 26, 9:35 PM CDT	River Flood Warning	LOT	36 hr
Oct 26, 9:57 PM CDT	River Flood Advisory	LOT	6 days
Oct 26, 9:57 PM CDT	River Flood Advisory	LOT	10 days
Oct 30, 2:27 PM CDT	Winter Weather Advisory	LOT	28 hr
Oct 30, 8:42 PM CDT	River Flood Advisory	LOT	7 days
Nov 10, 12:55 PM CST	Winter Weather Advisory	LOT	32 hr
Nov 20, 4:42 AM CST	Dense Fog Advisory	LOT	6 hr
Nov 21, 9:10 AM CST	River Flood Advisory	LOT	15 days
Nov 21, 9:10 AM CST	River Flood Advisory	LOT	21 days
Nov 25, 2:44 PM CST	High Wind Watch	LOT	23 hr
Nov 26, 1:26 PM CST	High Wind Warning	LOT	29 hr
Nov 27, 10:11 AM CST	River Flood Advisory	LOT	5 days
Dec 1, 2:48 AM CST	Dense Fog Advisory	LOT	9 hr
Dec 9, 1:57 PM CST	Winter Weather Advisory	LOT	109 min
Dec 24, 3:08 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	3
Severe Thunderstorm Watch	8
Tornado Watch	1
Mesoscale Discussion	29
Special Weather Statement	22
Flooding
Flash Flood Warning	2
River Flood Warning	36
Flash Flood Watch	6
Flood Watch	1
River Flood Watch	14
Areal Flood Advisory	6
River Flood Advisory	41
Winter
Ice Storm Warning	1
Winter Storm Warning	5
Winter Storm Watch	3
Winter Weather Advisory	19
Heat
Excessive Heat Warning	1
Heat Advisory	1
Cold
Freeze Warning	1
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	2
Frost Advisory	1
Wind Chill Advisory	5
Wind and dust
High Wind Warning	2
High Wind Watch	2
Wind Advisory	7
Fog and smoke
Dense Fog Advisory	9

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2018 2020

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.