Alert archive / Colorado / Archuleta County
Weather alerts in Archuleta County, Colorado, 2009
60 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Archuleta County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 60
- Warnings
- 15
- Watches
- 20
- Advisories
- 22
- Busiest month
- December12 alerts
- Busiest day
- November 12, 20093 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Archuleta County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: tornado warnings | 0 | 2 | 0% | |||
| NWS Grand Junction, CO: severe thunderstorm warnings | 29 | 8 | 72% | 25 | 60% | 18 min |
| NWS Grand Junction, CO: flash flood warnings | 11 | 1 | 91% | 2 | 50% | 0 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 2, 4:41 AM MST | Winter Weather Advisory | GJT | 67 hr |
| Jan 4, 3:29 PM MST | Winter Storm Watch | GJT | 13 hr |
| Jan 22, 1:00 PM MST | Winter Storm Warning | GJT | 5 days |
| Jan 25, 3:24 PM MST | Winter Storm Watch | GJT | 3 hr |
| Feb 6, 4:00 AM MST | Winter Storm Watch | GJT | 22 hr |
| Feb 6, 2:58 PM MST | Winter Storm Warning | GJT | 63 hr |
| Feb 8, 3:06 PM MST | Winter Weather Advisory | GJT | 48 hr |
| Feb 9, 10:35 AM MST | Winter Storm Warning | GJT | 29 hr |
| Feb 12, 4:30 AM MST | Winter Weather Advisory | GJT | 32 hr |
| Feb 13, 3:15 PM MST | Winter Weather Advisory | GJT | 27 hr |
| Feb 15, 3:42 PM MST | Winter Storm Watch | GJT | 21 hr |
| Feb 16, 4:34 AM MST | Winter Storm Warning | GJT | 64 hr |
| Feb 23, 4:15 AM MST | Winter Weather Advisory | GJT | 26 hr |
| Mar 6, 4:30 AM MST | Winter Weather Advisory | GJT | 44 hr |
| Mar 12, 4:01 AM MDT | Winter Weather Advisory | GJT | 38 hr |
| Mar 21, 4:46 AM MDT | Winter Storm Watch | GJT | 24 hr |
| Mar 21, 3:35 PM MDT | Winter Weather Advisory | GJT | 68 hr |
| Mar 22, 3:43 PM MDT | Wind Advisory | GJT | 5 hr |
| Mar 24, 3:32 PM MDT | Winter Storm Watch | GJT | 23 hr |
| Mar 25, 2:47 PM MDT | Winter Weather Advisory | GJT | 43 hr |
| Mar 27, 1:55 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 29, 4:30 AM MDT | Wind Advisory | GJT | 18 hr |
| Mar 31, 4:33 AM MDT | Winter Weather Advisory | GJT | 40 hr |
| Apr 2, 4:40 AM MDT | Winter Storm Watch | GJT | 11 hr |
| Apr 2, 3:45 PM MDT | Winter Storm Warning | GJT | 56 hr |
| Apr 8, 12:39 AM MDT | Wind Advisory | GJT | 20 hr |
| Apr 10, 4:02 AM MDT | Winter Storm Watch | GJT | 6 hr |
| Apr 10, 10:20 AM MDT | Winter Storm Warning | GJT | 56 hr |
| Apr 14, 4:26 AM MDT | Winter Storm Watch | GJT | 8 hr |
| Apr 14, 12:31 PM MDT | Winter Storm Warning | GJT | 4 days |
| Apr 15, 8:37 AM MDT | Wind Advisory | GJT | 11 hr |
| Apr 25, 4:19 AM MDT | Wind Advisory | GJT | 17 hr |
| Jun 26, 8:29 AM MDT | Flash Flood Watch | GJT | 12 hr |
| Sep 12, 5:14 PM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Sep 19, 3:17 PM MDT | Freeze Watch | GJT | 36 hr |
| Sep 20, 3:01 PM MDT | Special Weather Statement | ABQ | 29 min |
| Sep 21, 2:51 AM MDT | Freeze Warning | GJT | 30 hr |
| Sep 30, 3:47 AM MDT | Wind Advisory | GJT | 16 hr |
| Oct 26, 3:52 PM MDT | Winter Storm Watch | GJT | 13 hr |
| Oct 26, 3:52 PM MDT | Winter Storm Warning | GJT | 3 days |
| Oct 27, 5:13 AM MDT | Winter Storm Watch | GJT | 10 hr |
| Nov 11, 3:42 PM MST | Winter Storm Watch | GJT | 13 hr |
| Nov 12, 4:48 AM MST | Winter Storm Warning | GJT | 3 days |
| Nov 12, 4:48 AM MST | Winter Weather Advisory | GJT | 3 days |
| Nov 12, 12:52 PM MST | Winter Storm Watch | GJT | 27 hr |
| Nov 27, 3:03 AM MST | Winter Storm Watch | GJT | 24 hr |
| Nov 28, 3:31 AM MST | Winter Weather Advisory | GJT | 28 hr |
| Nov 29, 6:06 PM MST | Dense Fog Advisory | GJT | 12 hr |
| Dec 5, 4:26 AM MST | Blizzard Watch | GJT | 12 hr |
| Dec 5, 4:26 AM MST | Winter Storm Watch | GJT | 45 hr |
| Dec 5, 4:07 PM MST | Blizzard Warning | GJT | 71 hr |
| Dec 6, 2:20 PM MST | Winter Storm Warning | GJT | 49 hr |
| Dec 7, 10:01 PM MST | Mesoscale Discussion | SPC | 5 hr |
| Dec 8, 3:25 PM MST | Winter Weather Advisory | GJT | 35 hr |
| Dec 11, 3:06 PM MST | Winter Storm Watch | GJT | 13 hr |
| Dec 12, 4:05 AM MST | Winter Storm Warning | GJT | 53 hr |
| Dec 21, 3:05 AM MST | Winter Storm Watch | GJT | 12 hr |
| Dec 21, 3:08 PM MST | Winter Weather Advisory | GJT | 63 hr |
| Dec 21, 10:39 PM MST | Winter Storm Warning | GJT | 37 hr |
| Dec 29, 3:13 PM MST | Winter Weather Advisory | GJT | 37 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 | 2 |
| Special Weather Statement | 1 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 12 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 17 |
| Winter Weather Advisory | 15 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.