Alert archive / Colorado / Montrose County
Weather alerts in Montrose County, Colorado, 2020
131 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montrose County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 131
- Warnings
- 54
- Watches
- 36
- Advisories
- 35
- Busiest month
- June28 alerts
- Busiest day
- June 6, 20209 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Montrose County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 4 | 56% | 1 | 100% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: severe thunderstorm warnings | 45 | 22 | 51% | 96 | 35% | 20 min |
| NWS Grand Junction, CO: flash flood warnings | 3 | 2 | 33% | 6 | 50% | 40 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 5, 10:53 PM MST | Dense Fog Advisory | GJT | 10 hr |
| Jan 9, 1:28 AM MST | Dense Fog Advisory | GJT | 7 hr |
| Jan 10, 2:20 PM MST | Winter Weather Advisory | GJT | 3 days |
| Jan 16, 2:58 PM MST | Winter Weather Advisory | GJT | 29 hr |
| Jan 23, 3:38 AM MST | Dense Fog Advisory | GJT | 6 hr |
| Jan 24, 12:17 AM MST | Dense Fog Advisory | GJT | 12 hr |
| Feb 1, 4:02 AM MST | Winter Storm Watch | GJT | 23 hr |
| Feb 2, 2:47 AM MST | Winter Weather Advisory | GJT | 63 hr |
| Feb 4, 2:23 PM MST | Winter Storm Watch | GJT | 12 hr |
| Feb 5, 2:19 AM MST | Winter Storm Warning | GJT | 3 days |
| Feb 5, 2:19 AM MST | Winter Weather Advisory | GJT | 63 hr |
| Feb 8, 2:08 PM MST | Winter Weather Advisory | GJT | 40 hr |
| Feb 14, 1:22 PM MST | Winter Storm Watch | GJT | 22 hr |
| Feb 15, 3:10 AM MST | Winter Weather Advisory | GJT | 53 hr |
| Feb 21, 3:22 AM MST | Winter Weather Advisory | GJT | 59 hr |
| Feb 24, 9:03 AM MST | Special Weather Statement | GJT | 42 min |
| Mar 17, 2:29 PM MDT | Winter Weather Advisory | GJT | 64 hr |
| Apr 11, 1:51 PM MDT | Freeze Watch | GJT | 13 hr |
| Apr 11, 1:51 PM MDT | Freeze Watch | GJT | 13 hr |
| Apr 12, 2:53 AM MDT | Freeze Warning | GJT | 31 hr |
| Apr 12, 2:53 AM MDT | Freeze Warning | GJT | 55 hr |
| Apr 14, 4:32 AM MDT | Freeze Warning | GJT | 29 hr |
| Apr 14, 2:43 PM MDT | Winter Storm Watch | GJT | 12 hr |
| Apr 14, 2:43 PM MDT | Winter Storm Warning | GJT | 57 hr |
| Apr 14, 2:43 PM MDT | Winter Weather Advisory | GJT | 57 hr |
| Apr 15, 1:39 PM MDT | Freeze Watch | GJT | 14 hr |
| Apr 16, 3:45 AM MDT | Freeze Warning | GJT | 30 hr |
| Apr 29, 2:12 AM MDT | Fire Weather Watch | GJT | 25 hr |
| Apr 30, 2:54 AM MDT | Red Flag Warning | GJT | 17 hr |
| Apr 30, 2:00 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 1, 2:13 PM MDT | Fire Weather Watch | GJT | 13 hr |
| May 2, 3:39 AM MDT | Red Flag Warning | GJT | 17 hr |
| May 2, 1:45 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 4, 2:36 PM MDT | Fire Weather Watch | GJT | 11 hr |
| May 5, 1:59 AM MDT | Fire Weather Watch | GJT | 37 hr |
| May 5, 1:59 AM MDT | Red Flag Warning | GJT | 43 hr |
| May 6, 2:44 PM MDT | Red Flag Warning | GJT | 30 hr |
| May 11, 4:00 AM MDT | Fire Weather Watch | GJT | 7 hr |
| May 11, 11:05 AM MDT | Red Flag Warning | GJT | 34 hr |
| May 11, 2:32 PM MDT | Severe Thunderstorm Warning | GJT | 28 min |
| May 11, 2:58 PM MDT | Severe Thunderstorm Warning | GJT | 32 min |
| May 12, 3:51 AM MDT | Fire Weather Watch | GJT | 10 hr |
| May 12, 2:04 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 16, 3:49 AM MDT | Fire Weather Watch | GJT | 24 hr |
| May 16, 2:19 PM MDT | Fire Weather Watch | GJT | 25 hr |
| May 16, 7:21 PM MDT | Red Flag Warning | GJT | 26 hr |
| May 17, 3:34 AM MDT | Red Flag Warning | GJT | 44 hr |
| May 17, 2:50 PM MDT | Red Flag Warning | GJT | 57 hr |
| May 18, 2:42 PM MDT | Wind Advisory | GJT | 30 hr |
| May 19, 2:45 AM MDT | Fire Weather Watch | GJT | 12 hr |
| May 19, 2:15 PM MDT | Red Flag Warning | GJT | 30 hr |
| May 21, 2:08 AM MDT | Fire Weather Watch | GJT | 12 hr |
| May 21, 2:03 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 22, 3:11 AM MDT | Fire Weather Watch | GJT | 11 hr |
| May 22, 2:22 PM MDT | Red Flag Warning | GJT | 31 hr |
| May 30, 2:09 PM MDT | Special Weather Statement | GJT | 36 min |
| Jun 4, 2:41 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 5, 3:42 AM MDT | Flash Flood Watch | GJT | 36 hr |
| Jun 5, 2:46 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 6, 2:16 AM MDT | Wind Advisory | GJT | 18 hr |
| Jun 6, 7:01 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 9:48 AM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 6, 10:24 AM MDT | Severe Thunderstorm Warning | GJT | 36 min |
| Jun 6, 10:53 AM MDT | Severe Thunderstorm Warning | GJT | 22 min |
| Jun 6, 11:18 AM MDT | Severe Thunderstorm Warning | GJT | 27 min |
| Jun 6, 11:35 AM MDT | Severe Thunderstorm Warning | GJT | 25 min |
| Jun 6, 11:59 AM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Jun 6, 2:36 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 6, 8:09 PM MDT | Wind Advisory | GJT | 24 hr |
| Jun 8, 2:34 PM MDT | Winter Weather Advisory | GJT | 18 hr |
| Jun 11, 2:39 PM MDT | Fire Weather Watch | GJT | 37 hr |
| Jun 13, 3:37 AM MDT | Wind Advisory | GJT | 16 hr |
| Jun 13, 3:46 AM MDT | Fire Weather Watch | GJT | 41 hr |
| Jun 13, 3:46 AM MDT | Red Flag Warning | GJT | 40 hr |
| Jun 13, 12:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 2:40 PM MDT | Fire Weather Watch | GJT | 48 hr |
| Jun 14, 2:27 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 14, 2:27 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jun 16, 3:02 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 26, 1:55 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jun 27, 2:22 PM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 27, 2:22 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jun 27, 2:22 PM MDT | Wind Advisory | GJT | 51 hr |
| Jun 29, 2:14 PM MDT | Fire Weather Watch | GJT | 7 hr |
| Jul 4, 11:52 AM MDT | Special Weather Statement | GJT | 23 min |
| Jul 4, 2:26 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jul 5, 1:52 PM MDT | Fire Weather Watch | GJT | 25 hr |
| Jul 5, 1:52 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jul 6, 2:23 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jul 11, 3:19 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jul 11, 2:12 PM MDT | Red Flag Warning | GJT | 55 hr |
| Jul 12, 2:08 AM MDT | Fire Weather Watch | GJT | 12 hr |
| Jul 12, 1:48 PM MDT | Red Flag Warning | GJT | 54 hr |
| Jul 22, 2:56 PM MDT | Areal Flood Advisory | GJT | 49 min |
| Jul 27, 3:55 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 27, 4:22 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Jul 28, 1:49 PM MDT | Special Weather Statement | GJT | 41 min |
| Jul 28, 2:12 PM MDT | Severe Thunderstorm Warning | GJT | 33 min |
| Jul 29, 5:29 PM MDT | Severe Thunderstorm Warning | GJT | 31 min |
| Aug 4, 2:31 PM MDT | Red Flag Warning | GJT | 53 hr |
| Aug 6, 3:10 AM MDT | Red Flag Warning | GJT | 41 hr |
| Aug 10, 2:40 PM MDT | Red Flag Warning | GJT | 29 hr |
| Aug 11, 2:05 PM MDT | Red Flag Warning | GJT | 30 hr |
| Aug 19, 12:23 PM MDT | Fire Weather Watch | GJT | 15 hr |
| Aug 20, 3:15 AM MDT | Red Flag Warning | GJT | 18 hr |
| Sep 6, 9:38 PM MDT | Winter Storm Watch | GJT | 6 hr |
| Sep 7, 3:36 AM MDT | Winter Storm Warning | GJT | 3 days |
| Sep 7, 3:36 AM MDT | Winter Weather Advisory | GJT | 50 hr |
| Sep 24, 3:00 AM MDT | Red Flag Warning | GJT | 41 hr |
| Oct 13, 7:58 PM MDT | Wind Advisory | GJT | 23 hr |
| Oct 15, 4:11 AM MDT | Freeze Warning | GJT | 29 hr |
| Oct 21, 2:28 PM MDT | Fire Weather Watch | GJT | 11 hr |
| Oct 22, 1:40 AM MDT | Red Flag Warning | GJT | 16 hr |
| Oct 23, 3:12 AM MDT | Red Flag Warning | GJT | 16 hr |
| Oct 23, 1:36 PM MDT | Winter Storm Watch | GJT | 26 hr |
| Oct 24, 10:11 AM MDT | Freeze Warning | GJT | 50 hr |
| Oct 24, 3:31 PM MDT | Winter Storm Watch | GJT | 11 hr |
| Oct 24, 3:31 PM MDT | Winter Storm Warning | GJT | 50 hr |
| Oct 24, 8:45 PM MDT | Winter Weather Advisory | GJT | 45 hr |
| Nov 5, 1:50 PM MST | Winter Storm Watch | GJT | 25 hr |
| Nov 6, 3:11 PM MST | Winter Storm Warning | GJT | 3 days |
| Nov 6, 3:11 PM MST | Winter Weather Advisory | GJT | 43 hr |
| Nov 6, 7:39 PM MST | Wind Advisory | GJT | 32 hr |
| Nov 8, 3:23 AM MST | Winter Weather Advisory | GJT | 44 hr |
| Nov 13, 2:02 AM MST | Winter Weather Advisory | GJT | 40 hr |
| Nov 14, 2:57 AM MST | Wind Advisory | GJT | 15 hr |
| Nov 22, 3:15 AM MST | Winter Weather Advisory | GJT | 56 hr |
| Dec 9, 2:14 PM MST | Winter Weather Advisory | GJT | 55 hr |
| Dec 11, 3:20 AM MST | Winter Weather Advisory | GJT | 48 hr |
| Dec 17, 2:36 AM MST | Winter Weather Advisory | GJT | 33 hr |
| Dec 27, 2:41 PM MST | Winter Weather Advisory | GJT | 48 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 | 9 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 8 |
| Winter Weather Advisory | 20 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 34 |
| Fire Weather Watch | 23 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.