Alert archive / Montana / Dawson County
Weather alerts in Dawson County, Montana, 2020
100 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Dawson County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 100
- Warnings
- 33
- Watches
- 21
- Advisories
- 14
- Busiest month
- July31 alerts
- Busiest day
- July 23, 20205 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Dawson County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 12 | 25% | 4 | 50% | 11 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 Glasgow, MT: tornado warnings | 3 | 2 | 33% | 2 | 100% | 0 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 79 | 46 | 42% | 174 | 74% | 25 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, 2:07 PM MST | High Wind Watch | GGW | 25 hr |
| Jan 3, 2:55 PM MST | High Wind Warning | GGW | 36 hr |
| Jan 13, 2:19 PM MST | Wind Chill Advisory | GGW | 6 days |
| Feb 7, 2:07 PM MST | Winter Weather Advisory | GGW | 31 hr |
| Feb 11, 3:06 AM MST | Winter Weather Advisory | GGW | 30 hr |
| Feb 12, 3:17 AM MST | Wind Chill Advisory | GGW | 31 hr |
| Feb 23, 2:53 AM MST | Winter Weather Advisory | GGW | 48 hr |
| Mar 2, 2:06 PM MST | High Wind Watch | GGW | 13 hr |
| Mar 2, 2:06 PM MST | High Wind Warning | GGW | 52 hr |
| Mar 2, 4:43 PM MST | Flash Flood Watch | GGW | 24 hr |
| Mar 11, 2:43 PM MDT | Winter Storm Watch | GGW | 37 hr |
| Mar 13, 3:27 AM MDT | Winter Weather Advisory | GGW | 3 days |
| Mar 31, 3:21 AM MDT | Winter Weather Advisory | GGW | 39 hr |
| Apr 21, 10:28 AM MDT | Red Flag Warning | GGW | 11 hr |
| Apr 25, 3:05 PM MDT | Fire Weather Watch | GGW | 11 hr |
| Apr 26, 2:33 AM MDT | Red Flag Warning | GGW | 17 hr |
| Apr 27, 3:04 AM MDT | Fire Weather Watch | GGW | 24 hr |
| Apr 28, 3:13 AM MDT | Red Flag Warning | GGW | 18 hr |
| May 3, 1:47 PM MDT | Special Weather Statement | GGW | 58 min |
| May 3, 2:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 5:43 PM MDT | Special Weather Statement | GGW | 92 min |
| May 3, 6:58 PM MDT | Special Weather Statement | GGW | 77 min |
| May 20, 1:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 20, 3:11 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 20, 6:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 20, 7:28 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| May 20, 8:36 PM MDT | Severe Thunderstorm Warning | GGW | 39 min |
| May 20, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | 76 min |
| May 31, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| May 31, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 6, 4:49 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 7, 2:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 5:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 25, 3:17 PM MDT | Special Weather Statement | GGW | 43 min |
| Jun 27, 9:20 PM MDT | Special Weather Statement | GGW | 55 min |
| Jun 27, 10:12 PM MDT | Special Weather Statement | GGW | 63 min |
| Jun 29, 3:35 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jun 29, 3:56 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 29, 4:31 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jun 29, 6:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 2:47 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 3, 5:30 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 3, 7:22 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 3, 8:06 PM MDT | Severe Thunderstorm Warning | GGW | 43 min |
| Jul 4, 5:39 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 4, 8:30 PM MDT | Special Weather Statement | GGW | 45 min |
| Jul 4, 8:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 4, 10:07 PM MDT | Special Weather Statement | GGW | 68 min |
| Jul 4, 11:15 PM MDT | Special Weather Statement | GGW | 75 min |
| Jul 6, 1:20 PM MDT | Special Weather Statement | GGW | 40 min |
| Jul 6, 1:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 6, 2:21 PM MDT | Special Weather Statement | GGW | 39 min |
| Jul 6, 3:32 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jul 7, 12:47 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 1:14 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 5:13 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 7, 5:25 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 7, 6:27 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 7, 6:40 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 7, 7:24 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 7, 8:24 PM MDT | Severe Thunderstorm Warning | GGW | 25 min |
| Jul 10, 1:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 1:39 PM MDT | Special Weather Statement | GGW | 66 min |
| Jul 10, 2:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 1:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:27 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 3:31 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 23, 4:24 PM MDT | Special Weather Statement | GGW | 66 min |
| Jul 23, 5:35 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jul 23, 6:06 PM MDT | Special Weather Statement | GGW | 54 min |
| Jul 31, 9:55 AM MDT | Special Weather Statement | GGW | 35 min |
| Aug 6, 3:08 PM MDT | Red Flag Warning | GGW | 30 hr |
| Aug 11, 12:41 PM MDT | Red Flag Warning | GGW | 32 hr |
| Aug 16, 2:08 PM MDT | Heat Advisory | GGW | 53 hr |
| Aug 17, 2:44 PM MDT | Red Flag Warning | GGW | 29 hr |
| Aug 19, 3:18 AM MDT | Heat Advisory | GGW | 17 hr |
| Aug 20, 9:47 AM MDT | Red Flag Warning | GGW | 17 hr |
| Aug 20, 9:43 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Aug 20, 10:43 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Aug 27, 5:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 6:08 PM MDT | Special Weather Statement | GGW | 67 min |
| Aug 31, 3:18 AM MDT | Red Flag Warning | GGW | 66 hr |
| Sep 2, 9:44 AM MDT | High Wind Warning | GGW | 10 hr |
| Sep 13, 2:34 AM MDT | Fire Weather Watch | GGW | 17 hr |
| Sep 13, 2:34 AM MDT | Red Flag Warning | GGW | 40 hr |
| Sep 22, 2:07 PM MDT | Fire Weather Watch | GGW | 24 hr |
| Sep 23, 2:17 PM MDT | Red Flag Warning | GGW | 31 hr |
| Sep 25, 2:40 PM MDT | Red Flag Warning | GGW | 13 hr |
| Sep 25, 2:42 PM MDT | Red Flag Warning | GGW | 29 hr |
| Oct 20, 1:29 PM MDT | Winter Weather Advisory | GGW | 45 hr |
| Oct 23, 2:36 PM MDT | Winter Weather Advisory | GGW | 30 hr |
| Oct 30, 8:28 PM MDT | Special Weather Statement | GGW | 92 min |
| Nov 5, 2:26 PM MST | Winter Storm Watch | GGW | 47 hr |
| Nov 7, 1:55 PM MST | Winter Weather Advisory | GGW | 29 hr |
| Nov 18, 2:28 PM MST | Winter Weather Advisory | GGW | 21 hr |
| Dec 10, 11:40 AM MST | Dense Fog Advisory | GGW | 44 hr |
| Dec 18, 12:17 PM MST | High Wind Watch | GGW | 39 hr |
| Dec 20, 2:49 AM MST | High Wind Warning | GGW | 15 hr |
| Dec 21, 12:02 PM MST | High Wind Watch | GGW | 15 hr |
| Dec 22, 3:05 AM MST | High Wind Warning | GGW | 20 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 | 16 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 17 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 4 |
| Fire | |
| Red Flag Warning | 12 |
| Fire Weather Watch | 4 |
| 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 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.