Alert archive / Montana / Dawson County
Weather alerts in Dawson County, Montana, 2010
186 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 186
- Warnings
- 61
- Watches
- 38
- Advisories
- 48
- Busiest month
- July31 alerts
- Busiest day
- June 17, 20109 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Dawson County in 2010 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Dawson County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 39 | 23 | 41% | 10 | 60% | 14 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Glasgow, MT: tornado warnings | 25 | 5 | 80% | 23 | 43% | 14 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 181 | 104 | 43% | 216 | 74% | 26 min |
| NWS Glasgow, MT: flash flood warnings | 2 | 0 | 100% | 5 | 0% |
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, 2:57 PM MST | Winter Storm Watch | GGW | 23 hr |
| Jan 4, 3:33 AM MST | Winter Storm Warning | GGW | 59 hr |
| Jan 6, 3:50 AM MST | Wind Chill Advisory | GGW | 30 hr |
| Jan 11, 2:37 AM MST | Dense Fog Advisory | GGW | 7 hr |
| Jan 17, 4:59 AM MST | Dense Fog Advisory | GGW | 7 hr |
| Jan 18, 8:51 AM MST | Dense Fog Advisory | GGW | 2 hr |
| Jan 20, 1:54 PM MST | Winter Storm Watch | GGW | 31 hr |
| Jan 20, 7:56 PM MST | Dense Fog Advisory | GGW | 24 hr |
| Jan 21, 1:51 PM MST | Dense Fog Advisory | GGW | 6 hr |
| Jan 21, 8:54 PM MST | Winter Storm Warning | GGW | 60 hr |
| Jan 24, 8:27 AM MST | Blizzard Warning | GGW | 30 hr |
| Jan 26, 2:54 PM MST | Wind Chill Advisory | GGW | 21 hr |
| Feb 4, 3:51 AM MST | Winter Weather Advisory | GGW | 31 hr |
| Feb 6, 2:27 PM MST | Wind Chill Advisory | GGW | 45 hr |
| Feb 9, 6:38 PM MST | Wind Chill Advisory | GGW | 9 hr |
| Feb 11, 5:16 PM MST | Dense Fog Advisory | GGW | 16 hr |
| Feb 13, 2:30 PM MST | Wind Chill Advisory | GGW | 18 hr |
| Feb 15, 3:32 AM MST | Dense Fog Advisory | GGW | 7 hr |
| Feb 21, 7:50 PM MST | Dense Fog Advisory | GGW | 14 hr |
| Feb 27, 1:40 AM MST | Dense Fog Advisory | GGW | 7 hr |
| Feb 27, 9:11 AM MST | Dense Fog Advisory | GGW | 2 hr |
| Mar 1, 4:57 AM MST | Dense Fog Advisory | GGW | 5 hr |
| Mar 1, 2:34 PM MST | Dense Fog Advisory | GGW | 22 hr |
| Mar 2, 2:33 PM MST | Dense Fog Advisory | GGW | 20 hr |
| Mar 3, 9:36 PM MST | Dense Fog Advisory | GGW | 13 hr |
| Mar 4, 5:48 PM MST | Dense Fog Advisory | GGW | 17 hr |
| Mar 6, 6:01 PM MST | Dense Fog Advisory | GGW | 58 hr |
| Mar 8, 9:32 AM MST | Freezing Rain Advisory | GGW | 4 hr |
| Mar 9, 9:49 AM MST | Dense Fog Advisory | GGW | 10 hr |
| Mar 9, 2:57 PM MST | Winter Weather Advisory | GGW | 33 hr |
| Mar 13, 8:14 PM MST | Dense Fog Advisory | GGW | 7 hr |
| Mar 29, 9:44 AM MDT | Red Flag Warning | GGW | 10 hr |
| Apr 7, 2:07 PM MDT | Red Flag Warning | GGW | 55 hr |
| Apr 8, 2:39 PM MDT | High Wind Warning | GGW | 13 hr |
| Apr 10, 3:37 AM MDT | Red Flag Warning | GGW | 16 hr |
| Apr 16, 9:21 PM MDT | Fire Weather Watch | GGW | 6 hr |
| Apr 17, 3:38 AM MDT | Red Flag Warning | GGW | 15 hr |
| Apr 27, 9:43 PM MDT | Fire Weather Watch | GGW | 6 hr |
| Apr 27, 9:43 PM MDT | Red Flag Warning | GGW | 19 hr |
| Apr 30, 9:37 AM MDT | High Wind Warning | GGW | 11 hr |
| May 1, 9:53 AM MDT | Winter Weather Advisory | GGW | 18 hr |
| May 1, 3:39 PM MDT | High Wind Watch | GGW | 26 hr |
| May 2, 5:45 PM MDT | High Wind Warning | GGW | 51 hr |
| May 5, 3:04 PM MDT | Winter Storm Watch | GGW | 13 hr |
| May 6, 4:22 AM MDT | Winter Storm Warning | GGW | 10 hr |
| May 6, 9:24 AM MDT | Winter Weather Advisory | GGW | 5 hr |
| May 24, 2:10 PM MDT | Flood Watch | GGW | 22 hr |
| May 24, 3:06 PM MDT | High Wind Warning | GGW | 21 hr |
| May 26, 2:37 PM MDT | Flash Flood Watch | GGW | 20 hr |
| May 27, 10:51 AM MDT | Flash Flood Watch | GGW | 23 hr |
| May 27, 2:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| May 27, 4:39 PM MDT | Tornado Watch | SPC | 8 hr |
| May 27, 6:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 9:25 PM MDT | Tornado Warning | GGW | 50 min |
| May 27, 10:09 PM MDT | Mesoscale Discussion | SPC | 66 min |
| May 27, 10:14 PM MDT | Tornado Warning | GGW | 31 min |
| May 28, 12:24 AM MDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 1:05 AM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| May 28, 6:03 AM MDT | Dense Fog Advisory | GGW | 4 hr |
| May 28, 10:04 AM MDT | Flash Flood Watch | GGW | 18 hr |
| May 28, 7:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| May 28, 9:44 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 11:28 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| May 28, 11:48 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| May 29, 12:41 AM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| May 29, 1:05 AM MDT | Mesoscale Discussion | SPC | 85 min |
| May 29, 1:07 AM MDT | Flash Flood Warning | GGW | 4 hr |
| Jun 15, 2:45 PM MDT | High Wind Watch | GGW | 37 hr |
| Jun 15, 2:48 PM MDT | Flash Flood Watch | GGW | 48 hr |
| Jun 16, 2:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 5:34 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 16, 6:20 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 16, 6:50 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jun 16, 7:23 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Jun 16, 7:33 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jun 16, 8:03 PM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| Jun 16, 8:05 PM MDT | Severe Thunderstorm Warning | GGW | 44 min |
| Jun 16, 8:07 PM MDT | Severe Thunderstorm Warning | GGW | 44 min |
| Jun 16, 8:58 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jun 17, 3:45 AM MDT | High Wind Warning | GGW | 30 hr |
| Jun 20, 2:29 PM MDT | Flash Flood Watch | GGW | 33 hr |
| Jun 21, 3:55 PM MDT | Tornado Watch | SPC | 5 hr |
| Jun 21, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jun 21, 7:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jun 21, 7:26 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jun 21, 8:26 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jun 21, 8:32 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jun 21, 8:52 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jun 21, 8:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 5:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 3:54 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jun 30, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 8:34 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Jun 30, 9:27 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 1, 1:37 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 1, 8:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 1, 9:45 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 10:08 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Jul 1, 10:14 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jul 1, 10:59 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jul 2, 12:43 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 3:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 2, 10:46 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 3, 12:32 AM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jul 3, 12:43 AM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 3, 1:09 AM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 3, 1:16 AM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 3, 2:02 AM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jul 12, 1:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 2:06 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 5:31 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jul 12, 7:14 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 12, 7:25 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 18, 6:21 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 3:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 26, 4:15 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 26, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | 32 min |
| Jul 26, 8:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 29, 3:03 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 29, 3:38 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 29, 5:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 31, 12:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 31, 8:05 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 1, 12:49 AM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 1, 2:39 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 5:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 1, 8:43 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 6, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 6, 9:49 PM MDT | Mesoscale Discussion | SPC | 26 min |
| Aug 6, 10:04 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 6, 10:15 PM MDT | Severe Thunderstorm Warning | GGW | 60 min |
| Aug 6, 10:23 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Aug 6, 10:47 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Aug 6, 10:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 6, 11:32 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Aug 9, 5:59 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 8:02 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Aug 9, 10:29 PM MDT | Severe Thunderstorm Warning | GGW | 30 min |
| Aug 9, 10:43 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 9, 10:53 PM MDT | Severe Thunderstorm Warning | GGW | 34 min |
| Aug 9, 11:21 PM MDT | Severe Thunderstorm Warning | GGW | 54 min |
| Aug 11, 2:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 4:50 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 5:55 PM MDT | Severe Thunderstorm Warning | GGW | 24 min |
| Aug 11, 7:32 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Aug 12, 5:22 PM MDT | Special Weather Statement | GGW | 23 min |
| Aug 12, 6:00 PM MDT | Severe Thunderstorm Warning | GGW | 60 min |
| Aug 19, 4:46 PM MDT | Special Weather Statement | GGW | 44 min |
| Aug 19, 5:27 PM MDT | Special Weather Statement | GGW | 63 min |
| Aug 21, 6:53 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Aug 24, 2:54 PM MDT | Fire Weather Watch | GGW | 24 hr |
| Aug 25, 2:56 PM MDT | Red Flag Warning | GGW | 54 hr |
| Sep 9, 1:47 PM MDT | Mesoscale Discussion | SPC | 28 min |
| Sep 9, 2:35 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 9, 6:32 PM MDT | Special Weather Statement | GGW | 28 min |
| Sep 9, 7:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Sep 9, 7:19 PM MDT | Severe Thunderstorm Warning | GGW | 41 min |
| Oct 25, 2:25 PM MDT | Winter Weather Advisory | GGW | 41 hr |
| Nov 9, 3:52 AM MST | Winter Weather Advisory | GGW | 31 hr |
| Nov 15, 3:07 AM MST | Winter Storm Watch | GGW | 12 hr |
| Nov 15, 7:46 AM MST | Winter Weather Advisory | GGW | 4 hr |
| Nov 15, 3:20 PM MST | Winter Storm Warning | GGW | 30 hr |
| Nov 16, 9:44 PM MST | Winter Weather Advisory | GGW | 6 hr |
| Nov 19, 3:57 AM MST | Winter Weather Advisory | GGW | 48 hr |
| Nov 21, 3:00 PM MST | Winter Weather Advisory | GGW | 18 hr |
| Nov 22, 2:57 PM MST | Winter Weather Advisory | GGW | 61 hr |
| Nov 24, 2:50 PM MST | Wind Chill Advisory | GGW | 19 hr |
| Nov 28, 2:09 PM MST | Winter Weather Advisory | GGW | 21 hr |
| Dec 2, 1:31 AM MST | Dense Fog Advisory | GGW | 12 hr |
| Dec 2, 3:08 AM MST | Winter Weather Advisory | GGW | 33 hr |
| Dec 3, 11:43 AM MST | Winter Weather Advisory | GGW | 3 hr |
| Dec 5, 7:40 PM MST | Dense Fog Advisory | GGW | 32 hr |
| Dec 9, 2:37 PM MST | Winter Weather Advisory | GGW | 32 hr |
| Dec 10, 3:11 PM MST | Wind Chill Advisory | GGW | 18 hr |
| Dec 11, 3:38 AM MST | Winter Storm Watch | GGW | 25 hr |
| Dec 12, 4:48 AM MST | Winter Weather Advisory | GGW | 18 hr |
| Dec 18, 3:33 PM MST | Winter Storm Watch | GGW | 30 hr |
| Dec 19, 2:42 PM MST | Winter Storm Warning | GGW | 27 hr |
| Dec 24, 12:51 AM MST | Dense Fog Advisory | GGW | 32 hr |
| Dec 27, 3:37 PM MST | Winter Storm Watch | GGW | 23 hr |
| Dec 28, 2:53 PM MST | Wind Chill Watch | GGW | 43 hr |
| Dec 28, 2:53 PM MST | Winter Storm Warning | GGW | 24 hr |
| Dec 29, 2:23 PM MST | Blizzard Warning | GGW | 13 hr |
| Dec 30, 3:38 AM MST | Winter Weather Advisory | GGW | 13 hr |
| Dec 30, 10:03 AM MST | Wind Chill Advisory | GGW | 49 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 | 39 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 35 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 5 |
| Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 7 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 17 |
| Cold | |
| Wind Chill Watch | 1 |
| Wind Chill Advisory | 8 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 22 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.