Boulder County, Colorado weather alerts

Nothing is in force for Boulder 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 WarningSun, Aug 30, 2:10 PM MDT
2. Severe Thunderstorm WarningSun, Aug 30, 1:53 PM MDT
3. Red Flag WarningWed, Aug 5, 12:00 PM MDT
4. Severe Thunderstorm WarningTue, Jul 28, 1:52 PM MDT
5. Severe Thunderstorm WarningFri, Jul 24, 5:05 PM MDT
6. Red Flag WarningTue, Jun 30, 12:00 PM MDT
7. Red Flag WarningMon, Jun 29, 12:00 PM MDT
8. Red Flag WarningSun, Jun 28, 11:00 AM MDT
9. Red Flag WarningSat, Jun 27, 11:00 AM MDT
10. Severe Thunderstorm WarningFri, Jun 26, 9:59 PM MDT
11. Severe Thunderstorm WarningFri, Jun 26, 1:57 PM MDT
12. Severe Thunderstorm WarningWed, Jun 24, 7:47 PM MDT
13. Red Flag WarningWed, Jun 24, 11:00 AM MDT
14. Red Flag WarningTue, Jun 23, 12:00 PM MDT
15. Severe Thunderstorm WarningSun, Jun 21, 9:30 PM MDT
16. Red Flag WarningSat, Jun 20, 11:00 AM MDT
17. Red Flag WarningWed, Jun 17, 12:00 PM MDT
18. Severe Thunderstorm WarningMon, Jun 1, 1:35 PM MDT
19. Winter Storm WarningMon, May 18, 12:00 AM MDT
20. Freeze WarningWed, May 6, 8:00 PM MDT
21. Winter Storm WarningTue, May 5, 12:00 AM MDT
22. Red Flag WarningFri, Apr 24, 11:00 AM MDT
23. Red Flag WarningThu, Apr 23, 11:00 AM MDT
24. Red Flag WarningWed, Apr 22, 10:00 AM MDT
25. Freeze WarningFri, Apr 17, 8:00 PM MDT
26. Red Flag WarningFri, Apr 3, 8:00 AM MDT
27. Red Flag WarningMon, Mar 30, 11:00 AM MDT
28. Red Flag WarningSat, Mar 21, 11:00 AM MDT
29. Red Flag WarningWed, Mar 18, 11:00 AM MDT
30. High Wind WarningMon, Mar 16, 5:00 AM MDT
31. Red Flag WarningSat, Mar 14, 11:00 AM MDT
32. Red Flag WarningFri, Mar 13, 11:00 AM MDT
33. Red Flag WarningThu, Mar 12, 11:00 AM MDT
34. High Wind WarningThu, Mar 12, 4:00 AM MDT
35. Red Flag WarningTue, Mar 10, 12:00 PM MDT
36. Winter Storm WarningFri, Mar 6, 12:00 AM MST
37. Red Flag WarningFri, Feb 27, 8:00 AM MST
38. Red Flag WarningWed, Feb 25, 10:00 AM MST
39. Winter Storm WarningTue, Feb 24, 8:00 PM MST
40. High Wind WarningTue, Feb 24, 8:00 AM MST
41. Red Flag WarningTue, Feb 24, 7:30 AM MST
42. High Wind WarningWed, Feb 18, 8:00 PM MST
43. Red Flag WarningTue, Feb 17, 10:00 AM MST
44. Red Flag WarningFri, Jan 16, 9:00 AM MST
45. Red Flag WarningThu, Jan 15, 10:00 AM MST
46. Red Flag WarningTue, Jan 6, 8:00 AM MST
47. Red Flag WarningMon, Dec 22, 8:00 AM MST
48. Red Flag WarningFri, Dec 19, 5:00 AM MST
49. High Wind WarningThu, Dec 18, 9:00 PM MST
50. Red Flag WarningWed, Dec 17, 11:00 AM MST
51. High Wind WarningWed, Dec 17, 8:00 AM MST
52. Red Flag WarningThu, Dec 11, 8:16 AM MST
53. High Wind WarningWed, Dec 10, 11:00 AM MST
54. High Wind WarningTue, Dec 9, 12:00 AM MST
55. Winter Storm WarningFri, Dec 5, 11:00 PM MST
56. Red Flag WarningThu, Nov 6, 7:21 AM MST
57. Freeze WarningTue, Oct 28, 10:00 PM MDT
58. Freeze WarningTue, Oct 28, 2:00 AM MDT
59. Freeze WarningTue, Oct 21, 12:00 AM MDT
60. Red Flag WarningMon, Oct 20, 9:00 AM MDT

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.

• Broomfield CountyNone
• Gilpin CountyNone
• Grand CountyNone
• Jefferson CountyNone
• Larimer CountyNone
• Weld 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.