Alert archive / Colorado / Montrose County
Weather alerts in Montrose County, Colorado, 2018
120 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 120
- Warnings
- 43
- Watches
- 26
- Advisories
- 44
- Busiest month
- April20 alerts
- Busiest day
- July 17, 20184 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 0 | 100% | 3 | 0% | |
| Flash flood warnings | 2 | 1 | 50% | 1 | 0% |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Junction, CO: tornado warnings | 0 | 1 | 0% | |||
| NWS Grand Junction, CO: severe thunderstorm warnings | 29 | 8 | 72% | 41 | 22% | 21 min |
| NWS Grand Junction, CO: flash flood warnings | 32 | 11 | 66% | 31 | 45% | 95 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, 2:55 PM MST | Winter Weather Advisory | GJT | 42 hr |
| Jan 7, 9:16 PM MST | Dense Fog Advisory | GJT | 12 hr |
| Jan 8, 2:52 PM MST | Winter Storm Watch | GJT | 6 hr |
| Jan 8, 9:00 PM MST | Winter Storm Warning | GJT | 48 hr |
| Jan 8, 9:00 PM MST | Winter Weather Advisory | GJT | 48 hr |
| Jan 19, 8:41 AM MST | Winter Storm Watch | GJT | 6 hr |
| Jan 19, 2:54 PM MST | Winter Storm Watch | GJT | 6 hr |
| Jan 19, 2:54 PM MST | Winter Weather Advisory | GJT | 54 hr |
| Jan 21, 11:24 AM MST | Winter Storm Warning | GJT | 10 hr |
| Feb 4, 2:17 PM MST | Winter Weather Advisory | GJT | 46 hr |
| Feb 9, 2:10 PM MST | Winter Weather Advisory | GJT | 33 hr |
| Feb 11, 5:12 AM MST | Winter Weather Advisory | GJT | 54 hr |
| Feb 12, 1:05 PM MST | Winter Weather Advisory | GJT | 22 hr |
| Feb 13, 12:19 AM MST | Dense Fog Advisory | GJT | 9 hr |
| Feb 13, 9:52 PM MST | Winter Storm Watch | GJT | 6 hr |
| Feb 14, 3:39 AM MST | Winter Storm Warning | GJT | 44 hr |
| Feb 14, 3:39 AM MST | Winter Weather Advisory | GJT | 44 hr |
| Feb 17, 4:07 AM MST | Winter Storm Watch | GJT | 24 hr |
| Feb 17, 2:12 PM MST | Winter Storm Warning | GJT | 66 hr |
| Feb 17, 2:12 PM MST | Winter Weather Advisory | GJT | 66 hr |
| Feb 18, 1:25 PM MST | Wind Advisory | GJT | 30 hr |
| Feb 22, 3:10 PM MST | Winter Weather Advisory | GJT | 45 hr |
| Mar 3, 3:04 AM MST | Winter Weather Advisory | GJT | 49 hr |
| Mar 15, 3:52 AM MDT | Winter Weather Advisory | GJT | 24 hr |
| Mar 16, 9:11 PM MDT | Winter Weather Advisory | GJT | 63 hr |
| Mar 22, 4:30 AM MDT | Winter Weather Advisory | GJT | 38 hr |
| Apr 1, 2:47 PM MDT | Red Flag Warning | GJT | 30 hr |
| Apr 1, 2:52 PM MDT | Wind Advisory | GJT | 33 hr |
| Apr 7, 4:19 AM MDT | Winter Storm Warning | GJT | 29 hr |
| Apr 10, 2:00 PM MDT | Red Flag Warning | GJT | 30 hr |
| Apr 11, 2:34 PM MDT | Red Flag Warning | GJT | 29 hr |
| Apr 11, 3:02 PM MDT | Winter Weather Advisory | GJT | 52 hr |
| Apr 11, 5:05 PM MDT | Wind Advisory | GJT | 27 hr |
| Apr 12, 2:09 PM MDT | Freeze Watch | GJT | 22 hr |
| Apr 13, 4:03 AM MDT | Freeze Warning | GJT | 28 hr |
| Apr 14, 1:35 PM MDT | Fire Weather Watch | GJT | 14 hr |
| Apr 15, 4:01 AM MDT | Red Flag Warning | GJT | 44 hr |
| Apr 15, 1:50 PM MDT | Wind Advisory | GJT | 54 hr |
| Apr 17, 2:33 AM MDT | Red Flag Warning | GJT | 7 hr |
| Apr 17, 2:42 AM MDT | Freeze Warning | GJT | 30 hr |
| Apr 17, 2:35 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Apr 18, 3:11 AM MDT | Red Flag Warning | GJT | 42 hr |
| Apr 19, 9:24 AM MDT | Winter Storm Warning | GJT | 33 hr |
| Apr 19, 9:24 AM MDT | Winter Weather Advisory | GJT | 43 hr |
| Apr 28, 2:43 AM MDT | Fire Weather Watch | GJT | 12 hr |
| Apr 28, 2:38 PM MDT | Red Flag Warning | GJT | 30 hr |
| May 1, 3:34 AM MDT | Winter Weather Advisory | GJT | 56 hr |
| May 8, 1:56 PM MDT | Fire Weather Watch | GJT | 13 hr |
| May 9, 3:08 AM MDT | Red Flag Warning | GJT | 42 hr |
| May 10, 3:52 AM MDT | Red Flag Warning | GJT | 42 hr |
| May 10, 3:15 PM MDT | Red Flag Warning | GJT | 55 hr |
| May 11, 8:47 PM MDT | Wind Advisory | GJT | 23 hr |
| May 15, 1:37 PM MDT | Fire Weather Watch | GJT | 19 hr |
| May 16, 8:39 AM MDT | Red Flag Warning | GJT | 36 hr |
| May 23, 2:48 PM MDT | Fire Weather Watch | GJT | 35 hr |
| May 25, 1:52 AM MDT | Red Flag Warning | GJT | 44 hr |
| May 29, 2:57 PM MDT | Fire Weather Watch | GJT | 24 hr |
| May 30, 4:30 AM MDT | Red Flag Warning | GJT | 42 hr |
| May 31, 4:31 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 7, 4:01 AM MDT | Fire Weather Watch | GJT | 24 hr |
| Jun 7, 2:40 PM MDT | Fire Weather Watch | GJT | 20 hr |
| Jun 8, 4:20 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 8, 10:50 AM MDT | Red Flag Warning | GJT | 59 hr |
| Jun 12, 3:00 PM MDT | Fire Weather Watch | GJT | 12 hr |
| Jun 13, 3:02 AM MDT | Red Flag Warning | GJT | 42 hr |
| Jun 14, 3:48 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 18, 2:10 AM MDT | Red Flag Warning | GJT | 18 hr |
| Jun 20, 3:08 PM MDT | Fire Weather Watch | GJT | 23 hr |
| Jun 21, 2:25 PM MDT | Red Flag Warning | GJT | 31 hr |
| Jun 22, 4:13 AM MDT | Fire Weather Watch | GJT | 11 hr |
| Jun 22, 3:14 PM MDT | Red Flag Warning | GJT | 30 hr |
| Jun 26, 2:41 PM MDT | Fire Weather Watch | GJT | 14 hr |
| Jun 27, 4:43 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jun 27, 2:34 PM MDT | Fire Weather Watch | GJT | 13 hr |
| Jun 28, 3:54 AM MDT | Red Flag Warning | GJT | 41 hr |
| Jul 10, 6:21 PM MDT | Special Weather Statement | GJT | 39 min |
| Jul 11, 2:31 PM MDT | Special Weather Statement | GJT | 44 min |
| Jul 12, 1:07 PM MDT | Special Weather Statement | GJT | 38 min |
| Jul 14, 3:13 PM MDT | Flash Flood Watch | GJT | 30 hr |
| Jul 15, 2:09 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Jul 16, 6:59 PM MDT | Areal Flood Advisory | GJT | 2 hr |
| Jul 17, 4:20 PM MDT | Severe Thunderstorm Warning | GJT | 25 min |
| Jul 17, 4:43 PM MDT | Severe Thunderstorm Warning | GJT | 32 min |
| Jul 17, 5:21 PM MDT | Special Weather Statement | GJT | 39 min |
| Aug 3, 6:21 PM MDT | Special Weather Statement | GJT | 39 min |
| Aug 3, 7:10 PM MDT | Special Weather Statement | GJT | 35 min |
| Aug 21, 4:02 AM MDT | Flash Flood Watch | GJT | 44 hr |
| Aug 21, 3:25 PM MDT | Special Weather Statement | GJT | 50 min |
| Aug 21, 3:41 PM MDT | Flash Flood Warning | GJT | 3 hr |
| Aug 26, 6:08 PM MDT | Areal Flood Advisory | GJT | 3 hr |
| Aug 27, 9:44 AM MDT | Red Flag Warning | GJT | 11 hr |
| Aug 29, 11:42 AM MDT | Red Flag Warning | GJT | 32 hr |
| Sep 10, 1:38 PM MDT | Red Flag Warning | GJT | 55 hr |
| Sep 11, 2:32 PM MDT | Red Flag Warning | GJT | 54 hr |
| Sep 28, 3:50 AM MDT | Red Flag Warning | GJT | 40 hr |
| Sep 30, 2:58 PM MDT | Flash Flood Watch | GJT | 54 hr |
| Oct 4, 9:41 AM MDT | Areal Flood Advisory | GJT | 3 hr |
| Oct 7, 6:24 PM MDT | Winter Weather Advisory | GJT | 21 hr |
| Oct 9, 3:23 PM MDT | Winter Weather Advisory | GJT | 22 hr |
| Oct 10, 3:28 PM MDT | Winter Weather Advisory | GJT | 33 hr |
| Oct 12, 6:07 AM MDT | Dense Fog Advisory | GJT | 4 hr |
| Oct 12, 1:29 PM MDT | Freeze Watch | GJT | 47 hr |
| Oct 14, 12:46 PM MDT | Freeze Warning | GJT | 22 hr |
| Oct 24, 5:47 AM MDT | Dense Fog Advisory | GJT | 5 hr |
| Nov 3, 4:12 PM MDT | Winter Weather Advisory | GJT | 44 hr |
| Nov 20, 12:49 PM MST | Winter Weather Advisory | GJT | 71 hr |
| Nov 21, 3:16 PM MST | Winter Storm Watch | GJT | 37 hr |
| Nov 22, 1:49 PM MST | Winter Storm Warning | GJT | 61 hr |
| Nov 23, 4:11 AM MST | Winter Weather Advisory | GJT | 43 hr |
| Nov 28, 3:03 PM MST | Winter Weather Advisory | GJT | 69 hr |
| Nov 30, 3:01 AM MST | Winter Weather Advisory | GJT | 37 hr |
| Dec 6, 3:42 AM MST | Winter Weather Advisory | GJT | 23 hr |
| Dec 12, 3:40 AM MST | Winter Weather Advisory | GJT | 25 hr |
| Dec 23, 1:45 PM MST | Winter Storm Watch | GJT | 24 hr |
| Dec 23, 1:45 PM MST | Winter Weather Advisory | GJT | 28 hr |
| Dec 24, 2:11 PM MST | Winter Storm Warning | GJT | 39 hr |
| Dec 24, 8:58 PM MST | Winter Weather Advisory | GJT | 45 hr |
| Dec 25, 12:30 AM MST | Dense Fog Advisory | GJT | 3 hr |
| Dec 26, 9:42 AM MST | Dense Fog Advisory | GJT | 2 hr |
| Dec 30, 3:40 AM MST | Winter Weather Advisory | GJT | 61 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 |
| Special Weather Statement | 7 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 30 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 28 |
| Fire Weather Watch | 14 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.