Alert archive / Illinois / Cook County / 2026

Weather alerts in Cook County, Illinois, April 2026

45 weather alerts in April 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Alerts
45
Warnings
21
Watches
15
Advisories
7
Busiest day
April 15, 202611 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

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
Apr 2, 1:32 AM CDTWind AdvisoryLOT17 hr
Apr 2, 9:59 AM CDTRiver Flood WatchLOT15 hr
Apr 2, 1:43 PM CDTTornado WatchSPC8 hr
Apr 2, 8:02 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT58 min
Apr 2, 8:23 PM CDTSevere Thunderstorm WarningLOT67 min
Apr 2, 8:59 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT31 min
Apr 2, 10:13 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT47 min
Apr 2, 10:32 PM CDTSevere Thunderstorm WarningLOT43 min
Apr 2, 10:52 PM CDTSevere Thunderstorm WarningLOT68 min
Apr 3, 3:56 PM CDTFlood WatchLOT18 hr
Apr 3, 11:24 PM CDTAreal Flood AdvisoryLOT3 hr
Apr 4, 1:59 AM CDTAreal Flood WarningLOT8 hr
Apr 4, 6:37 AM CDTRiver Flood WarningLOT24 hr
Apr 4, 11:29 AM CDTRiver Flood WatchLOT57 hr
Apr 6, 8:23 PM CDTRiver Flood WarningLOT61 hr
Apr 9, 9:45 AM CDTRiver Flood WatchLOT24 hr
Apr 14, 2:33 PM CDTTornado WatchSPC9 hr
Apr 14, 7:11 PM CDTFlood WatchLOT30 hr
Apr 14, 9:28 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT62 min
Apr 14, 10:19 PM CDTAreal Flood AdvisoryLOT5 hr
Apr 14, 10:27 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT48 min
Apr 14, 10:51 PM CDTFlash Flood WarningLOT3 hr
Apr 15, 12:24 AM CDTRiver Flood WatchLOT21 days
Apr 15, 12:24 AM CDTRiver Flood WatchLOT21 days
Apr 15, 10:32 AM CDTRiver Flood WatchLOT26 hr
Apr 15, 10:32 AM CDTRiver Flood WatchLOT12 hr
Apr 15, 10:32 AM CDTRiver Flood WarningLOT10 days
Apr 15, 10:32 AM CDTRiver Flood WarningLOT10 days
Apr 15, 7:55 PM CDTSevere Thunderstorm WatchSPC4 hr
Apr 15, 9:51 PM CDTSevere Thunderstorm WarningLOT40 min
Apr 16, 7:01 PM CDTDense Fog AdvisoryLOT15 hr
Apr 17, 11:48 AM CDTFlood WatchLOT15 hr
Apr 17, 3:31 PM CDTTornado WatchSPC8 hr
Apr 17, 8:09 PM CDTMesoscale DiscussionSPC2 hr
Apr 17, 8:18 PM CDTSevere Thunderstorm Warning Considerable damage threatLOT72 min
Apr 17, 9:23 PM CDTSevere Thunderstorm WarningLOT82 min
Apr 17, 9:41 PM CDTAreal Flood AdvisoryLOT6 hr
Apr 17, 10:31 PM CDTTornado WarningLOT29 min
Apr 17, 10:59 PM CDTRiver Flood WarningLOT22 hr
Apr 18, 1:29 PM CDTFreeze WatchLOT12 hr
Apr 19, 1:52 AM CDTFreeze WarningLOT30 hr
Apr 19, 2:40 PM CDTFrost AdvisoryLOT17 hr
Apr 21, 1:07 PM CDTMesoscale DiscussionSPC113 min
Apr 27, 11:18 AM CDTWind AdvisoryLOT5 hr
Apr 27, 12:50 PM CDTHigh Wind WarningLOT3 hr

By product

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

ProductAlerts
Severe storms
Severe Thunderstorm Warning11
Tornado Warning1
Severe Thunderstorm Watch1
Tornado Watch3
Mesoscale Discussion2
Flooding
Areal Flood Warning1
Flash Flood Warning1
River Flood Warning5
Flood Watch3
River Flood Watch7
Areal Flood Advisory3
Cold
Freeze Warning1
Freeze Watch1
Frost Advisory1
Wind and dust
High Wind Warning1
Wind Advisory2
Fog and smoke
Dense Fog Advisory1

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

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.