Alert archive / Illinois / Lake County

Weather alerts in Lake County, Illinois, 2024

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

Lake County and its neighbors

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

Alerts
153
Warnings
37
Watches
29
Advisories
37
Busiest month
July29 alerts
Busiest day
July 15, 202410 alerts

Over time

By month

Warning verification

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

3 of 4 tornado warnings covering Lake County in 2024 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 23 minutes after it went out.

Lake County, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings4325%1100%23 min
Severe thunderstorm warnings14936%3281%31 min
Flash flood warnings3167%3100%133 min

Each office's whole area, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Chicago, IL: tornado warnings342041%5869%17 min
NWS Chicago, IL: severe thunderstorm warnings1558843%54979%30 min
NWS Chicago, IL: flash flood warnings22673%7272%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.

IssuedProductOfficeLasted
Jan 8, 3:00 AM CSTWinter Weather AdvisoryLOT47 hr
Jan 8, 2:07 PM CSTWinter Storm WarningLOT36 hr
Jan 10, 2:18 PM CSTWinter Storm WatchLOT24 hr
Jan 11, 2:22 PM CSTWinter Storm WarningLOT37 hr
Jan 12, 4:23 AM CSTMesoscale DiscussionSPC4 hr
Jan 12, 9:31 AM CSTWinter Weather AdvisoryLOT26 hr
Jan 13, 3:29 AM CSTWind Chill AdvisoryLOT4 days
Jan 13, 2:17 PM CSTWind Chill WarningLOT70 hr
Jan 13, 2:17 PM CSTWinter Weather AdvisoryLOT20 hr
Jan 14, 3:32 AM CSTWind Chill AdvisoryLOT3 days
Jan 18, 3:41 AM CSTWinter Weather AdvisoryLOT26 hr
Jan 21, 2:42 PM CSTWinter Weather AdvisoryLOT42 hr
Jan 22, 3:21 AM CSTWinter Weather AdvisoryLOT33 hr
Jan 23, 1:57 PM CSTDense Fog AdvisoryLOT22 hr
Jan 24, 2:57 PM CSTDense Fog AdvisoryLOT30 hr
Jan 26, 8:39 AM CSTDense Fog AdvisoryLOT5 hr
Jan 26, 1:22 PM CSTDense Fog AdvisoryLOT33 hr
Jan 28, 11:53 AM CSTRiver Flood WarningLOT4 days
Feb 4, 10:23 PM CSTDense Fog AdvisoryLOT8 hr
Feb 27, 2:35 PM CSTWind AdvisoryLOT15 hr
Feb 27, 2:50 PM CSTMesoscale DiscussionSPC115 min
Feb 27, 3:53 PM CSTTornado WatchSPC6 hr
Feb 27, 5:59 PM CSTMesoscale DiscussionSPC91 min
Feb 27, 7:07 PM CSTSevere Thunderstorm Warning Considerable damage threatLOT68 min
Feb 27, 7:17 PM CSTTornado WarningLOT28 min
Feb 27, 7:32 PM CSTTornado WarningLOT38 min
Mar 4, 1:25 PM CSTMesoscale DiscussionSPC2 hr
Mar 21, 3:30 AM CDTWinter Weather AdvisoryLOT37 hr
Apr 1, 9:09 PM CDTRiver Flood WarningLOT14 days
Apr 1, 9:56 PM CDTRiver Flood WatchMKX8 hr
Apr 2, 6:02 AM CDTRiver Flood WarningMKX21 days
Apr 2, 9:32 AM CDTRiver Flood WatchLOT21 days
Apr 2, 9:32 AM CDTRiver Flood WatchLOT21 days
Apr 2, 9:17 PM CDTRiver Flood WarningLOT6 days
Apr 2, 9:17 PM CDTRiver Flood WarningLOT9 days
Apr 20, 8:47 PM CDTFrost AdvisoryLOT11 hr
Apr 23, 2:52 PM CDTMesoscale DiscussionSPC113 min
Apr 24, 2:41 AM CDTFreeze WatchLOT12 hr
Apr 24, 2:58 PM CDTFreeze WarningLOT17 hr
Apr 26, 4:15 PM CDTSpecial Weather StatementLOT45 min
Apr 27, 7:58 PM CDTMesoscale DiscussionSPC62 min
May 2, 3:07 PM CDTMesoscale DiscussionSPC113 min
May 4, 5:41 PM CDTSpecial Weather StatementLOT34 min
May 4, 6:07 PM CDTSevere Thunderstorm WarningLOT23 min
May 7, 12:14 PM CDTMesoscale DiscussionSPC2 hr
May 7, 1:28 PM CDTTornado WatchSPC12 hr
May 8, 1:39 PM CDTRiver Flood WatchMKX9 hr
May 8, 10:23 PM CDTRiver Flood WarningMKX50 hr
May 13, 5:22 PM CDTAreal Flood AdvisoryLOT4 hr
May 13, 5:48 PM CDTFlash Flood WarningLOT112 min
May 20, 10:13 AM CDTMesoscale DiscussionSPC92 min
May 20, 12:39 PM CDTSevere Thunderstorm WatchSPC3 hr
May 20, 2:04 PM CDTSevere Thunderstorm WarningLOT41 min
May 20, 2:19 PM CDTSevere Thunderstorm WarningLOT41 min
May 21, 4:16 AM CDTDense Fog AdvisoryLOT7 hr
May 21, 10:20 PM CDTWind AdvisoryLOT6 hr
May 24, 6:07 AM CDTSevere Thunderstorm WatchSPC9 hr
May 24, 4:46 PM CDTMesoscale DiscussionSPC119 min
May 26, 3:26 PM CDTMesoscale DiscussionSPC94 min
May 26, 6:10 PM CDTSevere Thunderstorm WarningLOT80 min
May 26, 6:20 PM CDTTornado WarningLOT55 min
May 26, 7:32 PM CDTSpecial Weather StatementLOT43 min
May 28, 1:02 PM CDTMesoscale DiscussionSPC3 hr
May 28, 4:49 PM CDTAreal Flood AdvisoryLOT3 hr
May 28, 5:18 PM CDTAreal Flood AdvisoryLOT3 hr
Jun 4, 7:47 PM CDTSpecial Weather StatementLOT28 min
Jun 4, 11:59 PM CDTSpecial Weather StatementLOT31 min
Jun 5, 2:44 AM CDTRiver Flood WatchMKX4 days
Jun 9, 3:17 AM CDTBeach Hazards StatementLOT46 hr
Jun 13, 1:02 PM CDTMesoscale DiscussionSPC118 min
Jun 13, 4:46 PM CDTMesoscale DiscussionSPC89 min
Jun 16, 2:15 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 16, 3:42 PM CDTMesoscale DiscussionSPC2 hr
Jun 16, 5:04 PM CDTSevere Thunderstorm WarningLOT41 min
Jun 22, 7:36 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 22, 7:37 PM CDTFlood WatchLOT5 hr
Jun 22, 8:40 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT50 min
Jun 22, 9:13 PM CDTFlash Flood WarningLOT4 hr
Jun 23, 1:18 AM CDTAreal Flood WarningLOT9 hr
Jun 24, 7:31 PM CDTSevere Thunderstorm WatchSPC3 hr
Jun 25, 1:25 AM CDTSevere Thunderstorm WarningLOT14 min
Jun 25, 5:00 AM CDTSevere Thunderstorm WatchSPC6 hr
Jun 25, 6:28 AM CDTMesoscale DiscussionSPC92 min
Jun 25, 6:38 AM CDTSevere Thunderstorm WarningLOT52 min
Jun 25, 8:05 AM CDTAreal Flood AdvisoryLOT115 min
Jun 25, 4:54 PM CDTMesoscale DiscussionSPC96 min
Jun 26, 3:47 AM CDTBeach Hazards StatementLOT36 hr
Jun 29, 3:58 AM CDTBeach Hazards StatementLOT51 hr
Jul 1, 3:00 PM CDTBeach Hazards StatementLOT21 hr
Jul 13, 5:08 PM CDTSpecial Weather StatementLOT37 min
Jul 13, 10:00 PM CDTSpecial Weather StatementLOT30 min
Jul 13, 11:41 PM CDTAreal Flood AdvisoryLOT3 hr
Jul 14, 2:19 AM CDTFlood WatchLOT9 hr
Jul 14, 3:03 PM CDTFlood WatchLOT11 hr
Jul 14, 3:15 PM CDTMesoscale DiscussionSPC90 min
Jul 14, 5:55 PM CDTSevere Thunderstorm WatchSPC9 hr
Jul 14, 7:51 PM CDTMesoscale DiscussionSPC84 min
Jul 14, 9:36 PM CDTMesoscale DiscussionSPC54 min
Jul 15, 12:26 PM CDTRiver Flood WatchLOT4 days
Jul 15, 12:52 PM CDTFlood WatchLOT14 hr
Jul 15, 1:03 PM CDTRiver Flood WatchLOT17 hr
Jul 15, 1:03 PM CDTRiver Flood WatchLOT48 hr
Jul 15, 1:03 PM CDTRiver Flood WatchLOT4 days
Jul 15, 1:59 PM CDTMesoscale DiscussionSPC3 hr
Jul 15, 6:06 PM CDTMesoscale DiscussionSPC114 min
Jul 15, 6:53 PM CDTTornado WatchSPC6 hr
Jul 15, 7:38 PM CDTSevere Thunderstorm WarningLOT35 min
Jul 15, 8:26 PM CDTMesoscale DiscussionSPC2 hr
Jul 15, 8:35 PM CDTFlash Flood WarningLOT4 hr
Jul 15, 8:52 PM CDTSevere Thunderstorm WarningLOT83 min
Jul 15, 9:16 PM CDTTornado WarningLOT44 min
Jul 15, 10:15 PM CDTRiver Flood WatchMKX18 hr
Jul 15, 11:08 PM CDTRiver Flood WarningLOT7 days
Jul 15, 11:08 PM CDTRiver Flood WarningLOT12 days
Jul 16, 5:39 AM CDTRiver Flood WarningLOT64 hr
Jul 16, 3:56 PM CDTRiver Flood WarningMKX62 hr
Jul 17, 2:19 PM CDTBeach Hazards StatementLOT29 hr
Aug 5, 2:59 PM CDTBeach Hazards StatementLOT54 hr
Aug 5, 5:09 PM CDTMesoscale DiscussionSPC66 min
Aug 6, 2:26 AM CDTMesoscale DiscussionSPC2 hr
Aug 6, 3:36 AM CDTSevere Thunderstorm WarningLOT39 min
Aug 6, 4:02 AM CDTSevere Thunderstorm WarningLOT43 min
Aug 14, 3:43 AM CDTDense Fog AdvisoryLOT5 hr
Aug 15, 3:44 AM CDTBeach Hazards StatementLOT18 hr
Aug 16, 5:31 PM CDTMesoscale DiscussionSPC119 min
Aug 17, 3:42 AM CDTBeach Hazards StatementLOT4 days
Aug 24, 2:32 PM CDTExcessive Heat WatchLOT48 hr
Aug 25, 3:35 AM CDTHeat AdvisoryLOT40 hr
Aug 25, 2:13 PM CDTExcessive Heat WarningLOT54 hr
Aug 27, 11:25 AM CDTMesoscale DiscussionSPC3 hr
Aug 27, 12:04 PM CDTSevere Thunderstorm WatchSPC2 hr
Aug 27, 4:47 PM CDTMesoscale DiscussionSPC88 min
Aug 27, 4:54 PM CDTBeach Hazards StatementLOT11 hr
Aug 27, 4:54 PM CDTLakeshore Flood AdvisoryLOT11 hr
Aug 27, 5:09 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 27, 5:45 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT75 min
Aug 27, 6:24 PM CDTMesoscale DiscussionSPC96 min
Aug 30, 3:07 PM CDTBeach Hazards StatementLOT68 hr
Sep 5, 9:50 AM CDTBeach Hazards StatementLOT66 hr
Sep 18, 3:21 AM CDTDense Fog AdvisoryLOT5 hr
Sep 21, 9:34 PM CDTBeach Hazards StatementLOT47 hr
Sep 26, 3:12 PM CDTBeach Hazards StatementLOT4 days
Oct 15, 3:29 AM CDTFrost AdvisoryLOT30 hr
Oct 16, 1:54 PM CDTFrost AdvisoryLOT19 hr
Oct 30, 3:06 PM CDTWind AdvisoryLOT31 hr
Nov 17, 10:55 PM CSTDense Fog AdvisoryLOT7 hr
Nov 21, 3:58 AM CSTWinter Weather AdvisoryLOT11 hr
Nov 21, 3:59 AM CSTWind AdvisoryLOT10 hr
Nov 21, 9:26 AM CSTMesoscale DiscussionSPC3 hr
Dec 4, 2:19 AM CSTWind AdvisoryLOT22 hr
Dec 15, 2:48 AM CSTDense Fog AdvisoryLOT9 hr
Dec 15, 3:12 PM CSTDense Fog AdvisoryLOT20 hr
Dec 26, 5:14 AM CSTDense Fog AdvisoryLOT16 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20232025

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.