Alert archive / Colorado / Costilla County
Weather alerts in Costilla County, Colorado, 2009
75 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Costilla County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 75
- Warnings
- 24
- Watches
- 21
- Advisories
- 19
- Busiest month
- March23 alerts
- Busiest day
- July 21, 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.
Costilla County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 2 | 33% | 0 | ||
| Flash flood warnings | 0 | 1 | 0% |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pueblo, CO: tornado warnings | 25 | 4 | 84% | 11 | 36% | 14 min |
| NWS Pueblo, CO: severe thunderstorm warnings | 206 | 74 | 64% | 181 | 81% | 25 min |
| NWS Pueblo, CO: flash flood warnings | 11 | 4 | 64% | 13 | 62% | 27 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, 3:00 PM MST | Winter Weather Advisory | PUB | 30 hr |
| Jan 8, 2:19 PM MST | Winter Weather Advisory | PUB | 31 hr |
| Jan 25, 3:20 PM MST | Winter Weather Advisory | PUB | 37 hr |
| Feb 5, 10:27 AM MST | Fire Weather Watch | PUB | 9 hr |
| Feb 5, 7:53 PM MST | Red Flag Warning | PUB | 23 hr |
| Feb 6, 4:00 PM MST | Winter Storm Watch | PUB | 19 hr |
| Feb 7, 10:49 AM MST | Winter Weather Advisory | PUB | 35 hr |
| Feb 9, 2:11 PM MST | Winter Storm Warning | PUB | 33 hr |
| Feb 9, 2:11 PM MST | Winter Weather Advisory | PUB | 31 hr |
| Feb 25, 4:17 AM MST | Red Flag Warning | PUB | 15 hr |
| Feb 25, 3:32 PM MST | Fire Weather Watch | PUB | 13 hr |
| Feb 26, 4:17 AM MST | Red Flag Warning | PUB | 14 hr |
| Mar 2, 3:14 PM MST | Fire Weather Watch | PUB | 42 hr |
| Mar 2, 3:14 PM MST | Red Flag Warning | PUB | 27 hr |
| Mar 3, 3:45 PM MST | Fire Weather Watch | PUB | 24 hr |
| Mar 3, 3:45 PM MST | Red Flag Warning | PUB | 27 hr |
| Mar 4, 3:24 PM MST | Fire Weather Watch | PUB | 40 hr |
| Mar 4, 3:24 PM MST | Red Flag Warning | PUB | 28 hr |
| Mar 6, 4:19 AM MST | Fire Weather Watch | PUB | 23 hr |
| Mar 6, 4:19 AM MST | Red Flag Warning | PUB | 14 hr |
| Mar 8, 4:25 AM MDT | Fire Weather Watch | PUB | 23 hr |
| Mar 8, 2:24 PM MDT | Red Flag Warning | PUB | 5 hr |
| Mar 9, 3:41 AM MDT | Red Flag Warning | PUB | 16 hr |
| Mar 9, 4:04 PM MDT | Fire Weather Watch | PUB | 13 hr |
| Mar 10, 4:35 AM MDT | Red Flag Warning | PUB | 14 hr |
| Mar 12, 3:57 PM MDT | Winter Weather Advisory | PUB | 23 hr |
| Mar 14, 4:36 AM MDT | Fire Weather Watch | PUB | 23 hr |
| Mar 15, 4:04 AM MDT | Red Flag Warning | PUB | 16 hr |
| Mar 21, 4:07 AM MDT | Fire Weather Watch | PUB | 11 hr |
| Mar 21, 2:52 PM MDT | Red Flag Warning | PUB | 30 hr |
| Mar 24, 3:37 PM MDT | Winter Storm Watch | PUB | 38 hr |
| Mar 25, 3:47 PM MDT | Winter Storm Warning | PUB | 48 hr |
| Mar 26, 5:32 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 26, 10:34 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 27, 1:55 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 3, 3:59 AM MDT | Winter Weather Advisory | PUB | 44 hr |
| Apr 6, 3:22 PM MDT | Fire Weather Watch | PUB | 13 hr |
| Apr 7, 4:40 AM MDT | Fire Weather Watch | PUB | 11 hr |
| Apr 7, 3:25 PM MDT | Red Flag Warning | PUB | 30 hr |
| Apr 11, 4:01 AM MDT | Winter Weather Advisory | PUB | 35 hr |
| Apr 12, 8:06 AM MDT | Winter Storm Warning | PUB | 13 hr |
| Apr 15, 4:43 AM MDT | Winter Storm Watch | PUB | 30 hr |
| Apr 15, 3:24 PM MDT | Winter Storm Warning | PUB | 69 hr |
| Apr 16, 10:37 AM MDT | Winter Weather Advisory | PUB | 34 hr |
| May 21, 2:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 5, 1:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 6, 12:22 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 6, 4:19 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 15, 1:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 21, 2:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 21, 3:37 PM MDT | Areal Flood Advisory | PUB | 3 hr |
| Jul 21, 4:34 PM MDT | Severe Thunderstorm Warning | PUB | 56 min |
| Jul 25, 2:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 26, 10:39 AM MDT | Flash Flood Watch | PUB | 10 hr |
| Jul 28, 1:16 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 3:58 PM MDT | Severe Thunderstorm Warning | PUB | 45 min |
| Aug 14, 7:10 PM MDT | Areal Flood Advisory | PUB | 3 hr |
| Aug 16, 3:48 PM MDT | Frost Advisory | PUB | 16 hr |
| Aug 18, 11:41 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 4:49 AM MDT | Freeze Watch | PUB | 11 hr |
| Sep 21, 3:29 PM MDT | Freeze Warning | PUB | 18 hr |
| Oct 19, 3:38 PM MDT | Winter Storm Watch | PUB | 19 hr |
| Oct 20, 10:19 AM MDT | Winter Storm Warning | PUB | 35 hr |
| Oct 24, 9:29 PM MDT | Winter Weather Advisory | PUB | 27 hr |
| Oct 27, 3:37 AM MDT | Winter Storm Watch | PUB | 12 hr |
| Oct 27, 3:37 AM MDT | Winter Storm Warning | PUB | 65 hr |
| Oct 27, 3:33 PM MDT | Winter Weather Advisory | PUB | 53 hr |
| Nov 12, 4:03 AM MST | Winter Storm Warning | PUB | 3 days |
| Nov 13, 10:50 AM MST | Winter Storm Watch | PUB | 35 hr |
| Dec 2, 4:38 AM MST | Winter Weather Advisory | PUB | 30 hr |
| Dec 6, 5:13 AM MST | Winter Storm Warning | PUB | 60 hr |
| Dec 6, 8:32 PM MST | Winter Weather Advisory | PUB | 62 hr |
| Dec 8, 3:20 PM MST | Wind Chill Advisory | PUB | 41 hr |
| Dec 21, 8:45 PM MST | Winter Weather Advisory | PUB | 66 hr |
| Dec 24, 2:37 PM MST | Wind Chill Advisory | PUB | 17 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 | 2 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 11 |
| Flooding | |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 14 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 12 |
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.