Alert archive / Colorado / Gilpin County
Weather alerts in Gilpin County, Colorado, 2011
127 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Gilpin County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 127
- Warnings
- 38
- Watches
- 34
- Advisories
- 36
- Busiest month
- July23 alerts
- Busiest day
- June 30, 20115 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Gilpin County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 0 | 100% | 0 | ||
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Denver/Boulder, CO: tornado warnings | 35 | 6 | 83% | 11 | 73% | 12 min |
| NWS Denver/Boulder, CO: severe thunderstorm warnings | 212 | 85 | 60% | 251 | 65% | 19 min |
| NWS Denver/Boulder, CO: flash flood warnings | 36 | 6 | 83% | 7 | 86% | 68 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 7, 2:53 PM MST | Winter Storm Watch | BOU | 25 hr |
| Jan 8, 3:52 PM MST | Winter Weather Advisory | BOU | 41 hr |
| Jan 15, 3:18 PM MST | Winter Storm Watch | BOU | 13 hr |
| Jan 16, 3:50 AM MST | Winter Storm Warning | BOU | 54 hr |
| Jan 19, 4:23 AM MST | Winter Weather Advisory | BOU | 18 hr |
| Jan 21, 4:39 AM MST | Winter Weather Advisory | BOU | 41 hr |
| Jan 30, 3:13 PM MST | Winter Weather Advisory | BOU | 33 hr |
| Jan 31, 4:10 PM MST | Wind Chill Warning | BOU | 44 hr |
| Feb 4, 3:29 PM MST | Winter Storm Warning | BOU | 39 hr |
| Feb 4, 3:29 PM MST | Winter Weather Advisory | BOU | 18 hr |
| Feb 5, 2:33 PM MST | Winter Weather Advisory | BOU | 5 hr |
| Feb 6, 3:57 AM MST | Winter Weather Advisory | BOU | 12 hr |
| Feb 6, 3:52 PM MST | Winter Weather Advisory | BOU | 44 hr |
| Feb 15, 3:14 PM MST | Winter Storm Watch | BOU | 12 hr |
| Feb 16, 3:03 AM MST | Winter Weather Advisory | BOU | 37 hr |
| Feb 19, 3:47 AM MST | Winter Weather Advisory | BOU | 38 hr |
| Mar 6, 2:52 PM MST | Winter Weather Advisory | BOU | 37 hr |
| Mar 10, 3:19 AM MST | High Wind Watch | BOU | 12 hr |
| Mar 10, 3:39 PM MST | Red Flag Warning | BOU | 26 hr |
| Mar 15, 2:43 PM MDT | Red Flag Warning | BOU | 29 hr |
| Mar 15, 2:43 PM MDT | Red Flag Warning | BOU | 52 hr |
| Mar 20, 3:57 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Mar 20, 12:41 PM MDT | Red Flag Warning | BOU | 33 hr |
| Mar 21, 4:31 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Mar 21, 2:45 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 22, 3:49 AM MDT | High Wind Watch | BOU | 7 hr |
| Mar 22, 10:35 AM MDT | High Wind Warning | BOU | 11 hr |
| Mar 22, 10:06 PM MDT | High Wind Warning | BOU | 4 hr |
| Mar 23, 3:43 PM MDT | Fire Weather Watch | BOU | 11 hr |
| Mar 24, 2:38 AM MDT | Red Flag Warning | BOU | 17 hr |
| Mar 28, 12:29 PM MDT | Winter Weather Advisory | BOU | 12 hr |
| Mar 30, 4:03 PM MDT | Red Flag Warning | BOU | 26 hr |
| Apr 1, 4:20 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Apr 1, 3:34 PM MDT | Red Flag Warning | BOU | 44 hr |
| Apr 2, 4:51 PM MDT | Winter Weather Advisory | BOU | 28 hr |
| Apr 4, 4:04 AM MDT | High Wind Watch | BOU | 12 hr |
| Apr 4, 4:11 AM MDT | Fire Weather Watch | BOU | 12 hr |
| Apr 4, 3:51 PM MDT | Red Flag Warning | BOU | 28 hr |
| Apr 6, 2:28 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Apr 7, 2:47 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Apr 7, 2:47 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 8, 2:01 PM MDT | Red Flag Warning | BOU | 31 hr |
| Apr 10, 4:28 AM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 13, 4:06 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Apr 17, 3:42 PM MDT | Winter Storm Watch | BOU | 12 hr |
| Apr 18, 3:33 AM MDT | Winter Weather Advisory | BOU | 25 hr |
| Apr 21, 4:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Apr 23, 4:05 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| Apr 24, 3:53 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| Apr 25, 3:33 PM MDT | Winter Weather Advisory | BOU | 19 hr |
| Apr 26, 10:55 AM MDT | Winter Storm Warning | BOU | 13 hr |
| Apr 29, 10:50 AM MDT | Winter Weather Advisory | BOU | 18 hr |
| May 6, 2:02 PM MDT | Fire Weather Watch | BOU | 31 hr |
| May 7, 8:51 PM MDT | Red Flag Warning | BOU | 23 hr |
| May 8, 4:02 PM MDT | Red Flag Warning | BOU | 28 hr |
| May 10, 3:09 PM MDT | Winter Weather Advisory | BOU | 20 hr |
| May 11, 10:46 AM MDT | Winter Storm Warning | BOU | 19 hr |
| May 18, 4:43 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| May 20, 4:28 AM MDT | Winter Weather Advisory | BOU | 12 hr |
| May 23, 2:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| May 29, 3:35 PM MDT | High Wind Watch | BOU | 14 hr |
| Jun 15, 6:50 PM MDT | Red Flag Warning | BOU | 25 hr |
| Jun 19, 11:42 AM MDT | Winter Weather Advisory | BOU | 23 hr |
| Jun 25, 3:40 PM MDT | Red Flag Warning | BOU | 29 hr |
| Jun 28, 2:59 PM MDT | Fire Weather Watch | BOU | 25 hr |
| Jun 29, 3:48 PM MDT | Red Flag Warning | BOU | 28 hr |
| Jun 30, 11:57 AM MDT | Mesoscale Discussion | SPC | 63 min |
| Jun 30, 12:18 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 30, 1:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 30, 4:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 30, 5:43 PM MDT | Severe Thunderstorm Warning | BOU | 47 min |
| Jun 30, 6:04 PM MDT | Severe Thunderstorm Warning | BOU | 27 min |
| Jun 30, 7:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 3:15 AM MDT | Flash Flood Watch | BOU | 23 hr |
| Jul 7, 6:07 PM MDT | Areal Flood Advisory | BOU | 83 min |
| Jul 7, 6:27 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 7, 8:02 PM MDT | Flash Flood Warning | BOU | 97 min |
| Jul 8, 1:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 12, 3:49 AM MDT | Flash Flood Watch | BOU | 25 hr |
| Jul 12, 2:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 13, 5:13 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 8:12 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 14, 5:25 AM MDT | Flash Flood Watch | BOU | 16 hr |
| Jul 14, 1:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 3:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 17, 2:20 PM MDT | Special Weather Statement | BOU | 25 min |
| Jul 17, 2:25 PM MDT | Severe Thunderstorm Warning | BOU | 35 min |
| Jul 17, 2:29 PM MDT | Areal Flood Advisory | BOU | 91 min |
| Jul 17, 2:57 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 19, 11:13 AM MDT | Flash Flood Watch | BOU | 9 hr |
| Jul 19, 2:53 PM MDT | Special Weather Statement | BOU | 37 min |
| Jul 19, 4:21 PM MDT | Areal Flood Advisory | BOU | 95 min |
| Jul 25, 1:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 27, 6:05 PM MDT | Areal Flood Advisory | BOU | 85 min |
| Aug 2, 4:17 AM MDT | Flash Flood Watch | BOU | 16 hr |
| Aug 16, 1:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 16, 1:50 PM MDT | Special Weather Statement | BOU | 25 min |
| Sep 14, 2:53 PM MDT | Winter Weather Advisory | BOU | 13 hr |
| Oct 7, 5:00 AM MDT | Winter Storm Watch | BOU | 7 hr |
| Oct 7, 12:20 PM MDT | Winter Weather Advisory | BOU | 30 hr |
| Oct 15, 4:25 AM MDT | Red Flag Warning | BOU | 16 hr |
| Oct 16, 12:03 PM MDT | Winter Weather Advisory | BOU | 26 hr |
| Oct 23, 3:29 PM MDT | Winter Storm Watch | BOU | 36 hr |
| Oct 25, 3:49 AM MDT | Winter Storm Warning | BOU | 37 hr |
| Oct 25, 5:56 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 31, 5:02 AM MDT | Winter Storm Watch | BOU | 24 hr |
| Nov 1, 5:12 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Nov 1, 10:54 AM MDT | Winter Storm Warning | BOU | 25 hr |
| Nov 1, 7:13 PM MDT | Mesoscale Discussion | SPC | 5 hr |
| Nov 10, 3:23 PM MST | High Wind Watch | BOU | 12 hr |
| Nov 10, 3:39 PM MST | Winter Storm Watch | BOU | 19 hr |
| Nov 11, 3:04 AM MST | High Wind Warning | BOU | 51 hr |
| Nov 11, 10:23 AM MST | Winter Storm Warning | BOU | 62 hr |
| Nov 18, 5:14 AM MST | High Wind Watch | BOU | 10 hr |
| Nov 18, 3:28 PM MST | High Wind Warning | BOU | 12 hr |
| Nov 29, 12:14 PM MST | Winter Storm Watch | BOU | 23 hr |
| Nov 30, 11:27 AM MST | Winter Weather Advisory | BOU | 27 hr |
| Dec 2, 7:57 PM MST | Winter Weather Advisory | BOU | 18 hr |
| Dec 3, 3:20 PM MST | Winter Weather Advisory | BOU | 32 hr |
| Dec 20, 2:00 PM MST | Winter Storm Watch | BOU | 15 hr |
| Dec 21, 4:33 AM MST | Winter Storm Warning | BOU | 30 hr |
| Dec 21, 4:33 AM MST | Winter Weather Advisory | BOU | 30 hr |
| Dec 22, 3:04 AM MST | Mesoscale Discussion | SPC | 3 hr |
| Dec 28, 5:24 AM MST | High Wind Watch | BOU | 5 hr |
| Dec 28, 10:32 AM MST | High Wind Warning | BOU | 30 hr |
| Dec 29, 3:03 PM MST | High Wind Watch | BOU | 19 hr |
| Dec 30, 10:15 AM MST | High Wind Warning | BOU | 31 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 | 3 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 3 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 10 |
| Winter Weather Advisory | 32 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind and dust | |
| High Wind Warning | 6 |
| High Wind Watch | 8 |
| Fire | |
| Red Flag Warning | 17 |
| Fire Weather Watch | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.