Boone County, Illinois weather alerts

Nothing is in force for Boone 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. Severe Thunderstorm WarningFri, Aug 21, 3:45 PM CDT
2. Severe Thunderstorm WarningFri, Aug 21, 2:17 PM CDT
3. Severe Thunderstorm WarningTue, Aug 11, 9:22 AM CDT
4. Severe Thunderstorm WarningTue, Aug 11, 3:11 AM CDT
5. Extreme Heat WarningMon, Jul 27, 9:33 AM CDT
6. Severe Thunderstorm WarningFri, Jul 3, 7:33 PM CDT
7. Severe Thunderstorm WarningFri, Jul 3, 7:06 PM CDT
8. Severe Thunderstorm WarningFri, Jul 3, 11:14 AM CDT
9. Extreme Heat WarningTue, Jun 30, 1:51 AM CDT
10. Severe Thunderstorm WarningWed, Jun 24, 4:54 PM CDT
11. Severe Thunderstorm WarningWed, Jun 17, 8:31 PM CDT
12. Flash Flood WarningThu, Jun 11, 5:52 PM CDT
13. Severe Thunderstorm WarningThu, Jun 11, 5:39 PM CDT
14. Severe Thunderstorm WarningWed, Jun 10, 2:09 PM CDT
15. Freeze WarningMon, Apr 20, 12:00 AM CDT
16. Flood WarningSat, Apr 18, 1:54 AM CDT
17. Flash Flood WarningFri, Apr 17, 8:12 PM CDT
18. Severe Thunderstorm WarningFri, Apr 17, 7:16 PM CDT
19. Tornado WarningFri, Apr 17, 7:09 PM CDT
20. Tornado WarningFri, Apr 17, 5:07 PM CDT
21. Flood WarningThu, Apr 16, 1:00 PM CDT
22. Flash Flood WarningWed, Apr 15, 8:27 PM CDT
23. Severe Thunderstorm WarningWed, Apr 15, 2:48 AM CDT
24. Flash Flood WarningTue, Apr 14, 8:37 PM CDT
25. Severe Thunderstorm WarningTue, Apr 14, 8:12 PM CDT
26. Flood WarningSat, Apr 4, 4:22 PM CDT
27. Severe Thunderstorm WarningThu, Apr 2, 7:01 PM CDT
28. Severe Thunderstorm WarningThu, Apr 2, 7:00 PM CDT
29. Severe Thunderstorm WarningThu, Apr 2, 6:24 PM CDT
30. Severe Thunderstorm WarningMon, Mar 30, 10:42 PM CDT
31. Blizzard WarningSun, Mar 15, 10:00 PM CDT
32. Winter Storm WarningSun, Mar 15, 7:00 PM CDT
33. High Wind WarningFri, Mar 13, 1:00 AM CDT
34. Red Flag WarningWed, Feb 18, 10:00 AM CST
35. Extreme Cold WarningFri, Jan 23, 3:00 AM CST
36. Winter Storm WarningSat, Nov 29, 3:00 AM CST
37. Freeze WarningFri, Oct 24, 1:00 AM CDT

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 date links to the event at the IEM.

• DeKalb CountyNone
• McHenry CountyNone
• Rock County, WINone
• Walworth County, WINone
• Winnebago 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.

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.