Alert archive / Colorado / La Plata County
Weather alerts in La Plata County, Colorado, 2011
116 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
La Plata County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 116
- Warnings
- 42
- Watches
- 37
- Advisories
- 36
- Busiest month
- June20 alerts
- Busiest day
- March 20, 20114 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
La Plata County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 0 | 1 | 0% |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Goodland, KS: tornado warnings | 65 | 16 | 75% | 23 | 87% | 23 min |
| NWS Goodland, KS: severe thunderstorm warnings | 328 | 121 | 63% | 319 | 77% | 27 min |
| NWS Goodland, KS: flash flood warnings | 32 | 10 | 69% | 17 | 88% | 105 min |
| NWS Pueblo, CO: tornado warnings | 11 | 4 | 64% | 10 | 40% | 13 min |
| NWS Pueblo, CO: severe thunderstorm warnings | 126 | 34 | 73% | 91 | 59% | 18 min |
| NWS Pueblo, CO: flash flood warnings | 19 | 8 | 58% | 13 | 92% | 69 min |
| NWS Grand Junction, CO: tornado warnings | 2 | 1 | 50% | 1 | 100% | 6 min |
| NWS Grand Junction, CO: severe thunderstorm warnings | 30 | 6 | 80% | 26 | 42% | 18 min |
| NWS Grand Junction, CO: flash flood warnings | 37 | 3 | 92% | 24 | 13% | 28 min |
| 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 8, 2:42 AM MST | Winter Weather Advisory | GJT | 49 hr |
| Jan 30, 3:35 AM MST | Winter Weather Advisory | GJT | 3 days |
| Feb 6, 2:28 PM MST | Winter Weather Advisory | GJT | 54 hr |
| Feb 15, 2:59 PM MST | Blizzard Watch | GJT | 14 hr |
| Feb 15, 3:00 PM MST | High Wind Warning | GJT | 33 hr |
| Feb 16, 5:12 AM MST | Blizzard Warning | GJT | 23 hr |
| Feb 16, 5:12 AM MST | Winter Weather Advisory | GJT | 39 hr |
| Feb 16, 5:29 AM MST | Wind Advisory | GJT | 19 hr |
| Feb 17, 3:04 PM MST | Winter Storm Watch | GJT | 37 hr |
| Feb 18, 1:04 PM MST | Winter Storm Warning | GJT | 59 hr |
| Feb 19, 3:42 AM MST | Winter Weather Advisory | GJT | 31 hr |
| Feb 24, 3:56 AM MST | Winter Storm Warning | GJT | 3 days |
| Feb 24, 3:56 AM MST | Winter Weather Advisory | GJT | 3 days |
| Feb 24, 2:16 PM MST | Winter Storm Watch | GJT | 12 hr |
| Mar 5, 4:12 AM MST | Winter Weather Advisory | GJT | 50 hr |
| Mar 5, 2:15 PM MST | Winter Storm Watch | GJT | 38 hr |
| Mar 6, 3:01 PM MST | Winter Storm Warning | GJT | 51 hr |
| Mar 7, 4:02 AM MST | Winter Weather Advisory | GJT | 32 hr |
| Mar 18, 9:47 PM MDT | Red Flag Warning | GJT | 22 hr |
| Mar 19, 3:12 AM MDT | Fire Weather Watch | GJT | 24 hr |
| Mar 20, 3:29 AM MDT | Red Flag Warning | GJT | 18 hr |
| Mar 20, 2:35 PM MDT | Wind Advisory | GJT | 30 hr |
| Mar 20, 3:02 PM MDT | Winter Weather Advisory | GJT | 57 hr |
| Mar 20, 3:17 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Mar 21, 4:00 AM MDT | Red Flag Warning | GJT | 17 hr |
| Mar 26, 4:22 AM MDT | Winter Weather Advisory | GJT | 34 hr |
| Mar 31, 3:04 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Apr 1, 3:08 PM MDT | Red Flag Warning | GJT | 29 hr |
| Apr 2, 4:25 AM MDT | Winter Weather Advisory | GJT | 48 hr |
| Apr 6, 3:15 AM MDT | Winter Weather Advisory | GJT | 33 hr |
| Apr 8, 4:40 AM MDT | Winter Storm Watch | GJT | 22 hr |
| Apr 8, 10:01 AM MDT | Winter Storm Warning | GJT | 62 hr |
| Apr 20, 2:55 PM MDT | Red Flag Warning | GJT | 30 hr |
| Apr 22, 4:30 AM MDT | Winter Storm Watch | GJT | 11 hr |
| Apr 22, 3:00 PM MDT | Winter Storm Warning | GJT | 63 hr |
| Apr 25, 5:35 AM MDT | Freeze Watch | GJT | 4 hr |
| Apr 25, 9:55 AM MDT | Freeze Warning | GJT | 47 hr |
| Apr 25, 3:00 PM MDT | Winter Weather Advisory | GJT | 33 hr |
| Apr 26, 2:05 PM MDT | Freeze Watch | GJT | 17 hr |
| Apr 27, 6:51 AM MDT | Freeze Warning | GJT | 26 hr |
| Apr 27, 2:30 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Apr 28, 2:48 PM MDT | Red Flag Warning | GJT | 30 hr |
| Apr 29, 4:00 AM MDT | Wind Advisory | GJT | 17 hr |
| Apr 30, 2:13 PM MDT | Winter Weather Advisory | GJT | 34 hr |
| May 4, 9:21 PM MDT | Fire Weather Watch | GJT | 15 hr |
| May 4, 9:21 PM MDT | Fire Weather Watch | GJT | 26 hr |
| May 6, 2:34 PM MDT | Fire Weather Watch | GJT | 15 hr |
| May 6, 2:34 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 6, 3:00 PM MDT | Red Flag Warning | GJT | 6 hr |
| May 7, 5:16 AM MDT | Red Flag Warning | GJT | 40 hr |
| May 9, 3:13 PM MDT | Winter Storm Watch | GJT | 13 hr |
| May 10, 3:48 AM MDT | Winter Storm Warning | GJT | 44 hr |
| May 10, 3:48 AM MDT | Winter Weather Advisory | GJT | 44 hr |
| May 15, 4:32 AM MDT | Fire Weather Watch | GJT | 10 hr |
| May 15, 2:40 PM MDT | Red Flag Warning | GJT | 29 hr |
| May 17, 3:00 PM MDT | Winter Weather Advisory | GJT | 17 hr |
| May 18, 6:17 AM MDT | Winter Weather Advisory | GJT | 8 hr |
| May 18, 2:01 PM MDT | Winter Storm Warning | GJT | 58 hr |
| May 26, 4:13 AM MDT | Wind Advisory | GJT | 15 hr |
| May 28, 4:33 AM MDT | Wind Advisory | GJT | 40 hr |
| May 29, 2:55 PM MDT | Freeze Watch | GJT | 12 hr |
| May 30, 3:21 AM MDT | Freeze Warning | GJT | 29 hr |
| May 31, 3:01 PM MDT | Wind Advisory | GJT | 52 hr |
| Jun 5, 4:42 AM MDT | Fire Weather Watch | GJT | 10 hr |
| Jun 5, 3:05 PM MDT | Red Flag Warning | GJT | 33 hr |
| Jun 7, 2:54 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 14, 2:15 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 15, 2:02 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 15, 2:02 PM MDT | Fire Weather Watch | GJT | 48 hr |
| Jun 15, 2:02 PM MDT | Red Flag Warning | GJT | 32 hr |
| Jun 16, 2:27 PM MDT | Red Flag Warning | GJT | 29 hr |
| Jun 17, 1:46 PM MDT | Fire Weather Watch | GJT | 25 hr |
| Jun 17, 1:46 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 18, 2:57 PM MDT | Red Flag Warning | GJT | 28 hr |
| Jun 19, 2:03 PM MDT | Winter Weather Advisory | GJT | 25 hr |
| Jun 23, 3:25 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jun 23, 2:19 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jun 25, 2:53 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 26, 3:02 PM MDT | Fire Weather Watch | GJT | 44 hr |
| Jun 27, 2:44 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 28, 11:25 AM MDT | Red Flag Warning | GJT | 34 hr |
| Jun 29, 2:10 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 30, 9:06 AM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 3:21 AM MDT | Flash Flood Watch | GJT | 45 hr |
| Jul 13, 9:04 PM MDT | Special Weather Statement | ABQ | 26 min |
| Jul 25, 9:03 PM MDT | Flash Flood Watch | GJT | 25 hr |
| Aug 2, 4:40 AM MDT | Flash Flood Watch | GJT | 16 hr |
| Aug 4, 2:31 PM MDT | Areal Flood Advisory | GJT | 118 min |
| Aug 11, 1:46 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 16, 2:32 PM MDT | Areal Flood Advisory | GJT | 80 min |
| Aug 28, 5:53 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Sep 14, 5:00 AM MDT | Winter Weather Advisory | GJT | 24 hr |
| Oct 4, 4:51 AM MDT | Winter Storm Watch | GJT | 33 hr |
| Oct 5, 5:34 AM MDT | Winter Storm Warning | GJT | 39 hr |
| Oct 5, 9:35 PM MDT | Freeze Watch | GJT | 42 hr |
| Oct 5, 9:35 PM MDT | Freeze Watch | GJT | 16 hr |
| Oct 6, 1:28 PM MDT | Freeze Warning | GJT | 20 hr |
| Oct 7, 3:12 PM MDT | Freeze Watch | GJT | 23 hr |
| Oct 8, 2:15 PM MDT | Freeze Warning | GJT | 19 hr |
| Oct 9, 2:15 PM MDT | Freeze Warning | GJT | 19 hr |
| Oct 23, 10:55 PM MDT | Winter Storm Watch | GJT | 24 hr |
| Oct 24, 10:52 PM MDT | Winter Storm Warning | GJT | 46 hr |
| Nov 3, 4:37 AM MDT | Winter Storm Watch | GJT | 17 hr |
| Nov 3, 2:20 PM MDT | Winter Storm Warning | GJT | 58 hr |
| Nov 3, 9:55 PM MDT | Winter Weather Advisory | GJT | 50 hr |
| Nov 6, 2:55 PM MST | Winter Weather Advisory | GJT | 33 hr |
| Nov 10, 3:04 PM MST | Winter Storm Watch | GJT | 24 hr |
| Nov 11, 3:00 PM MST | Winter Weather Advisory | GJT | 51 hr |
| Nov 21, 8:45 AM MST | Winter Weather Advisory | GJT | 9 hr |
| Dec 2, 4:24 AM MST | Winter Storm Warning | GJT | 43 hr |
| Dec 2, 4:24 AM MST | Winter Weather Advisory | GJT | 43 hr |
| Dec 11, 3:13 PM MST | Winter Storm Watch | GJT | 11 hr |
| Dec 12, 2:10 AM MST | Winter Storm Warning | GJT | 58 hr |
| Dec 12, 2:10 AM MST | Winter Weather Advisory | GJT | 60 hr |
| Dec 20, 3:37 PM MST | Winter Weather Advisory | GJT | 52 hr |
| Dec 31, 9:30 AM MST | High Wind Warning | GJT | 5 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 Watch | 1 |
| Special Weather Statement | 1 |
| Flooding | |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 4 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 12 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 11 |
| Winter Weather Advisory | 26 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 6 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 21 |
| Fire Weather Watch | 15 |
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.