Cook County, Illinois weather alerts

Nothing is in force for Cook County right now. Its warnings come from the National Weather Service and appear here within a minute of being issued; every one of the past year is below.

Warnings issued

1. Flood WarningSun, Sep 20, 5:41 AM CDT
2. Extreme Heat WarningThu, Sep 3, 1:08 AM CDT
3. Flood WarningFri, Aug 14, 1:00 PM CDT
4. Severe Thunderstorm WarningWed, Aug 12, 9:26 AM CDT
5. Flood WarningTue, Aug 11, 8:48 PM CDT
6. Lakeshore Flood WarningTue, Aug 11, 11:24 AM CDT
7. Tornado WarningTue, Aug 11, 10:36 AM CDT
8. Tornado WarningTue, Aug 11, 10:29 AM CDT
9. Severe Thunderstorm WarningTue, Aug 11, 10:20 AM CDT
10. Severe Thunderstorm WarningTue, Aug 11, 10:17 AM CDT
11. Tornado WarningTue, Aug 11, 10:10 AM CDT
12. Severe Thunderstorm WarningSun, Aug 9, 11:22 PM CDT
13. Severe Thunderstorm WarningSun, Aug 9, 3:14 PM CDT
14. Severe Thunderstorm WarningSun, Aug 9, 2:51 PM CDT
15. Severe Thunderstorm WarningSun, Aug 9, 2:51 PM CDT
16. Severe Thunderstorm WarningSun, Aug 9, 1:03 PM CDT
17. Flood WarningSat, Aug 1, 11:37 PM CDT
18. Flood WarningSat, Aug 1, 5:44 PM CDT
19. Flood WarningSat, Aug 1, 5:30 PM CDT
20. Flood WarningSat, Aug 1, 3:36 PM CDT
21. Flood WarningSat, Aug 1, 9:09 AM CDT
22. Flash Flood WarningSat, Aug 1, 7:41 AM CDT
23. Flood WarningMon, Jul 27, 10:48 PM CDT
24. Severe Thunderstorm WarningMon, Jul 27, 5:28 PM CDT
25. Severe Thunderstorm WarningMon, Jul 27, 4:53 PM CDT
26. Severe Thunderstorm WarningMon, Jul 27, 4:08 PM CDT
27. Flood WarningMon, Jul 27, 4:00 PM CDT
28. Severe Thunderstorm WarningMon, Jul 27, 1:37 PM CDT
29. Severe Thunderstorm WarningMon, Jul 27, 1:28 PM CDT
30. Flash Flood WarningMon, Jul 27, 1:05 PM CDT
31. Tornado WarningMon, Jul 27, 12:55 PM CDT
32. Tornado WarningMon, Jul 27, 12:50 PM CDT
33. Severe Thunderstorm WarningMon, Jul 27, 12:49 PM CDT
34. Severe Thunderstorm WarningMon, Jul 27, 12:37 PM CDT
35. Severe Thunderstorm WarningMon, Jul 27, 12:15 PM CDT
36. Severe Thunderstorm WarningMon, Jul 27, 12:14 PM CDT
37. Tornado WarningMon, Jul 27, 12:10 PM CDT
38. Flash Flood WarningMon, Jul 27, 12:02 PM CDT
39. Severe Thunderstorm WarningMon, Jul 27, 11:39 AM CDT
40. Severe Thunderstorm WarningMon, Jul 27, 10:57 AM CDT
41. Flood WarningSat, Jul 4, 7:50 PM CDT
42. Flood WarningSat, Jul 4, 6:50 PM CDT
43. Flood WarningSat, Jul 4, 6:48 PM CDT
44. Flood WarningSat, Jul 4, 6:48 PM CDT
45. Flash Flood WarningSat, Jul 4, 5:18 PM CDT
46. Flash Flood WarningSat, Jul 4, 5:09 PM CDT
47. Flash Flood WarningSat, Jul 4, 4:19 PM CDT
48. Flash Flood WarningSat, Jul 4, 3:55 PM CDT
49. Severe Thunderstorm WarningSat, Jul 4, 3:50 PM CDT
50. Flash Flood WarningSat, Jul 4, 3:07 PM CDT
51. Flood WarningSat, Jul 4, 12:38 AM CDT
52. Flood WarningSat, Jul 4, 12:26 AM CDT
53. Flood WarningSat, Jul 4, 12:00 AM CDT
54. Flash Flood WarningFri, Jul 3, 10:50 PM CDT
55. Flash Flood WarningFri, Jul 3, 10:38 PM CDT
56. Flash Flood WarningFri, Jul 3, 10:09 PM CDT
57. Severe Thunderstorm WarningFri, Jul 3, 10:05 PM CDT
58. Severe Thunderstorm WarningFri, Jul 3, 9:15 PM CDT
59. Severe Thunderstorm WarningFri, Jul 3, 2:27 PM CDT
60. Severe Thunderstorm WarningFri, Jul 3, 1:05 PM CDT

And 86 earlier warnings.

From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each links to the alert's own page, with its text, map, radar and sounding.

Every alert in Cook County since 1986

• DuPage CountyNone
• Kane CountyNone
• Lake CountyFlood Warning2alerts
• Lake County, INNone
• McHenry CountyNone
• Will CountyNone

Warning

The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.

Watch

Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.

Advisory

A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.

Statement

Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.

Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.

The alerts on this page as a feed, updated every minute, for a feed reader or an app that reads Atom or RSS, and as a calendar where each alert runs from when it takes effect to when it ends. A feed or a calendar is not a warning siren: for warnings, keep a weather radio or your phone's emergency alerts on.

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Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.