Alert archive / Colorado / Clear Creek County
Weather alerts in Clear Creek County, Colorado, 2017
69 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clear Creek County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 69
- Warnings
- 26
- Watches
- 24
- Advisories
- 18
- Busiest month
- March19 alerts
- Busiest day
- January 10, 20174 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clear Creek County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Denver/Boulder, CO: tornado warnings | 18 | 3 | 83% | 15 | 33% | 8 min |
| NWS Denver/Boulder, CO: severe thunderstorm warnings | 145 | 51 | 65% | 143 | 65% | 17 min |
| NWS Denver/Boulder, CO: flash flood warnings | 9 | 2 | 78% | 4 | 50% | 22 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 5:08 AM MST | Winter Storm Watch | BOU | 10 hr |
| Jan 3, 5:08 AM MST | Winter Storm Warning | BOU | 54 hr |
| Jan 3, 3:08 PM MST | Winter Storm Watch | BOU | 14 hr |
| Jan 5, 11:10 AM MST | Winter Storm Warning | BOU | 4 hr |
| Jan 5, 3:19 PM MST | Winter Weather Advisory | BOU | 6 hr |
| Jan 7, 3:11 PM MST | Winter Storm Watch | BOU | 20 hr |
| Jan 7, 3:22 PM MST | High Wind Watch | BOU | 20 hr |
| Jan 8, 11:14 AM MST | Winter Storm Warning | BOU | 42 hr |
| Jan 8, 11:24 AM MST | High Wind Warning | BOU | 28 hr |
| Jan 10, 4:29 AM MST | High Wind Watch | BOU | 5 hr |
| Jan 10, 4:53 AM MST | Winter Weather Advisory | BOU | 19 hr |
| Jan 10, 9:38 AM MST | High Wind Warning | BOU | 19 hr |
| Jan 10, 11:53 AM MST | Winter Storm Warning | BOU | 36 hr |
| Jan 24, 11:45 AM MST | Freezing Fog Advisory | BOU | 2 hr |
| Feb 1, 1:44 PM MST | Winter Weather Advisory | BOU | 19 hr |
| Feb 4, 3:16 PM MST | Winter Storm Watch | BOU | 38 hr |
| Feb 6, 4:58 AM MST | Winter Storm Warning | BOU | 55 hr |
| Feb 10, 2:22 AM MST | High Wind Warning | BOU | 9 hr |
| Feb 20, 3:49 AM MST | Fire Weather Watch | BOU | 11 hr |
| Feb 20, 2:28 PM MST | Red Flag Warning | BOU | 28 hr |
| Feb 27, 8:46 PM MST | Winter Weather Advisory | BOU | 20 hr |
| Mar 3, 3:14 PM MST | Fire Weather Watch | BOU | 24 hr |
| Mar 3, 3:14 PM MST | Red Flag Warning | BOU | 27 hr |
| Mar 4, 3:26 PM MST | Red Flag Warning | BOU | 28 hr |
| Mar 5, 9:47 AM MST | Winter Weather Advisory | BOU | 32 hr |
| Mar 6, 4:16 AM MST | High Wind Watch | BOU | 11 hr |
| Mar 11, 4:29 AM MST | Fire Weather Watch | BOU | 8 hr |
| Mar 11, 12:56 PM MST | Red Flag Warning | BOU | 28 hr |
| Mar 15, 2:15 PM MDT | Fire Weather Watch | BOU | 17 hr |
| Mar 20, 5:24 AM MDT | Red Flag Warning | BOU | 12 hr |
| Mar 22, 10:47 AM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 22, 3:58 PM MDT | Winter Storm Watch | BOU | 24 hr |
| Mar 23, 5:00 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Mar 23, 3:28 PM MDT | Winter Storm Warning | BOU | 15 hr |
| Mar 27, 3:14 PM MDT | Winter Storm Watch | BOU | 15 hr |
| Mar 28, 6:04 AM MDT | Winter Storm Warning | BOU | 22 hr |
| Mar 28, 6:04 AM MDT | Winter Weather Advisory | BOU | 22 hr |
| Mar 30, 9:36 AM MDT | Winter Storm Watch | BOU | 24 hr |
| Mar 31, 4:37 AM MDT | Winter Storm Warning | BOU | 23 hr |
| Mar 31, 4:37 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Apr 2, 2:52 PM MDT | Winter Storm Watch | BOU | 13 hr |
| Apr 3, 4:10 AM MDT | Winter Weather Advisory | BOU | 44 hr |
| Apr 13, 2:08 PM MDT | Fire Weather Watch | BOU | 19 hr |
| Apr 20, 3:52 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Apr 26, 4:17 AM MDT | Winter Weather Advisory | BOU | 38 hr |
| Apr 27, 4:46 AM MDT | Winter Storm Watch | BOU | 24 hr |
| Apr 28, 4:49 AM MDT | Winter Storm Warning | BOU | 37 hr |
| Apr 28, 4:49 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| May 8, 2:25 PM MDT | Severe Thunderstorm Warning | BOU | 21 min |
| May 8, 2:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| May 16, 4:27 PM MDT | Winter Storm Watch | BOU | 19 hr |
| May 17, 4:41 AM MDT | Winter Storm Warning | BOU | 53 hr |
| Jun 13, 3:58 AM MDT | Red Flag Warning | BOU | 15 hr |
| Jul 29, 3:46 AM MDT | Flash Flood Watch | BOU | 23 hr |
| Sep 18, 3:22 AM MDT | Fire Weather Watch | BOU | 7 hr |
| Sep 18, 10:47 AM MDT | Red Flag Warning | BOU | 33 hr |
| Oct 1, 3:20 AM MDT | Winter Weather Advisory | BOU | 45 hr |
| Oct 7, 4:53 AM MDT | Winter Storm Watch | BOU | 23 hr |
| Oct 8, 4:14 AM MDT | Winter Storm Warning | BOU | 35 hr |
| Oct 28, 9:20 AM MDT | Winter Weather Advisory | BOU | 4 hr |
| Oct 31, 4:41 AM MDT | High Wind Watch | BOU | 6 hr |
| Oct 31, 11:06 AM MDT | High Wind Warning | BOU | 33 hr |
| Nov 15, 3:20 PM MST | Winter Storm Watch | BOU | 24 hr |
| Nov 16, 4:32 AM MST | Winter Storm Warning | BOU | 47 hr |
| Dec 20, 4:03 AM MST | Winter Weather Advisory | BOU | 38 hr |
| Dec 22, 5:05 AM MST | Winter Weather Advisory | BOU | 42 hr |
| Dec 24, 4:23 AM MST | Winter Weather Advisory | BOU | 50 hr |
| Dec 28, 2:30 AM MST | High Wind Watch | BOU | 8 hr |
| Dec 28, 10:07 AM MST | High Wind Warning | BOU | 29 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 1 |
| Mesoscale Discussion | 1 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 12 |
| Winter Storm Watch | 12 |
| Winter Weather Advisory | 17 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 5 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 6 |
| Fog and smoke | |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.