Alert archive / Montana / Roosevelt County
Weather alerts in Roosevelt County, Montana, 2019
139 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Roosevelt County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 139
- Warnings
- 38
- Watches
- 13
- Advisories
- 56
- Busiest month
- July35 alerts
- Busiest day
- July 8, 20198 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 1 tornado warnings covering Roosevelt County in 2019 had a tornado report inside them.
Roosevelt County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 17 | 35% | 14 | 79% | 22 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Glasgow, MT: tornado warnings | 7 | 1 | 86% | 1 | 100% | 0 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 119 | 66 | 45% | 144 | 74% | 27 min |
| NWS Glasgow, MT: flash flood warnings | 6 | 2 | 67% | 6 | 50% | 105 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 1, 3:08 AM MST | Wind Chill Advisory | GGW | 7 hr |
| Jan 16, 7:01 PM MST | Winter Weather Advisory | GGW | 40 hr |
| Jan 23, 1:48 PM MST | Wind Chill Advisory | GGW | 21 hr |
| Jan 26, 2:54 AM MST | High Wind Watch | GGW | 11 hr |
| Jan 26, 2:17 PM MST | High Wind Warning | GGW | 37 hr |
| Jan 28, 3:13 AM MST | Wind Chill Advisory | GGW | 56 hr |
| Jan 31, 1:59 PM MST | Winter Storm Watch | GGW | 37 hr |
| Feb 1, 2:02 PM MST | Winter Storm Warning | GGW | 61 hr |
| Feb 4, 2:49 AM MST | Wind Chill Advisory | GGW | 4 days |
| Feb 5, 8:43 AM MST | Winter Weather Advisory | GGW | 18 hr |
| Feb 7, 3:20 AM MST | Wind Chill Warning | GGW | 31 hr |
| Feb 8, 10:25 AM MST | Wind Chill Advisory | GGW | 3 days |
| Feb 11, 2:44 PM MST | Wind Chill Advisory | GGW | 18 hr |
| Feb 12, 2:21 PM MST | Wind Chill Advisory | GGW | 13 hr |
| Feb 13, 2:25 PM MST | Wind Chill Advisory | GGW | 21 hr |
| Feb 14, 12:15 PM MST | Wind Chill Warning | GGW | 21 hr |
| Feb 14, 12:15 PM MST | Winter Weather Advisory | GGW | 30 hr |
| Feb 15, 8:54 AM MST | Wind Chill Advisory | GGW | 5 hr |
| Feb 15, 3:01 PM MST | Winter Weather Advisory | GGW | 48 hr |
| Feb 17, 2:39 PM MST | Wind Chill Advisory | GGW | 20 hr |
| Feb 18, 2:37 PM MST | Wind Chill Advisory | GGW | 19 hr |
| Feb 19, 8:16 PM MST | Wind Chill Advisory | GGW | 13 hr |
| Feb 21, 2:30 PM MST | Wind Chill Advisory | GGW | 19 hr |
| Feb 23, 2:56 AM MST | Wind Chill Advisory | GGW | 56 hr |
| Feb 23, 9:16 AM MST | Winter Weather Advisory | GGW | 12 hr |
| Feb 25, 3:10 AM MST | Winter Weather Advisory | GGW | 31 hr |
| Feb 25, 2:21 PM MST | Wind Chill Advisory | GGW | 20 hr |
| Feb 26, 1:28 PM MST | Wind Chill Warning | GGW | 22 hr |
| Feb 26, 1:28 PM MST | Wind Chill Advisory | GGW | 28 hr |
| Mar 1, 3:38 AM MST | Wind Chill Advisory | GGW | 35 hr |
| Mar 1, 2:26 PM MST | Wind Chill Warning | GGW | 42 hr |
| Mar 3, 2:39 AM MST | Wind Chill Advisory | GGW | 6 hr |
| Mar 3, 8:54 AM MST | Winter Weather Advisory | GGW | 38 hr |
| Mar 4, 2:28 PM MST | Wind Chill Advisory | GGW | 16 hr |
| Mar 10, 9:39 PM MDT | Dense Fog Advisory | GGW | 11 hr |
| Mar 15, 7:31 AM MDT | Dense Fog Advisory | GGW | 2 hr |
| Mar 16, 4:38 AM MDT | Dense Fog Advisory | GGW | 6 hr |
| Mar 19, 2:23 PM MDT | Dense Fog Advisory | GGW | 16 hr |
| Mar 21, 3:27 PM MDT | Areal Flood Advisory | GGW | 48 hr |
| Mar 22, 9:01 AM MDT | Dense Fog Advisory | GGW | 3 hr |
| Mar 22, 12:14 PM MDT | River Flood Warning | GGW | 12 days |
| Mar 22, 3:37 PM MDT | Flood Watch | GGW | 25 hr |
| Mar 22, 5:05 PM MDT | Dense Fog Advisory | GGW | 18 hr |
| Mar 23, 2:56 AM MDT | Areal Flood Advisory | GGW | 13 hr |
| Mar 23, 3:07 PM MDT | Winter Weather Advisory | GGW | 45 hr |
| Mar 23, 3:35 PM MDT | Areal Flood Advisory | GGW | 6 days |
| Mar 25, 2:26 PM MDT | Dense Fog Advisory | GGW | 16 hr |
| Mar 29, 2:50 PM MDT | Areal Flood Advisory | GGW | 48 hr |
| Mar 30, 8:04 PM MDT | Areal Flood Warning | GGW | 38 hr |
| Mar 31, 2:22 PM MDT | Areal Flood Advisory | GGW | 72 hr |
| Apr 3, 2:16 PM MDT | Areal Flood Advisory | GGW | 48 hr |
| Apr 17, 3:39 PM MDT | Special Weather Statement | GGW | 66 min |
| Apr 18, 12:02 PM MDT | Red Flag Warning | GGW | 31 hr |
| Apr 24, 2:14 PM MDT | Fire Weather Watch | GGW | 13 hr |
| Apr 25, 3:30 AM MDT | Red Flag Warning | GGW | 17 hr |
| Apr 27, 2:15 PM MDT | Winter Weather Advisory | GGW | 34 hr |
| Jun 11, 6:50 PM MDT | Special Weather Statement | GGW | 25 min |
| Jun 19, 4:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 19, 4:57 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Jun 26, 1:16 PM MDT | Flash Flood Watch | GGW | 61 hr |
| Jun 27, 8:19 AM MDT | Flash Flood Warning | GGW | 3 hr |
| Jun 27, 6:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 7:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 27, 9:33 PM MDT | Severe Thunderstorm Warning | GGW | 72 min |
| Jun 27, 10:11 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 27, 10:45 PM MDT | Special Weather Statement | GGW | 60 min |
| Jun 27, 11:39 PM MDT | Special Weather Statement | GGW | 81 min |
| Jun 28, 9:48 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 28, 10:16 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jun 28, 10:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 28, 10:55 PM MDT | Severe Thunderstorm Warning | GGW | 80 min |
| Jun 28, 11:06 PM MDT | Severe Thunderstorm Warning | GGW | 54 min |
| Jun 28, 11:09 PM MDT | Tornado Warning | GGW | 36 min |
| Jun 28, 11:55 PM MDT | Severe Thunderstorm Warning | GGW | 38 min |
| Jul 1, 4:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 1, 6:18 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 7:31 PM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| Jul 1, 7:45 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jul 1, 8:09 PM MDT | Severe Thunderstorm Warning | GGW | 19 min |
| Jul 7, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 7, 8:35 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jul 7, 8:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 8:58 PM MDT | Severe Thunderstorm Warning | GGW | 47 min |
| Jul 7, 9:10 PM MDT | Special Weather Statement | GGW | 50 min |
| Jul 7, 9:48 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jul 7, 10:37 PM MDT | Severe Thunderstorm Warning | GGW | 27 min |
| Jul 7, 10:38 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Jul 8, 3:25 AM MDT | Flash Flood Watch | GGW | 38 hr |
| Jul 9, 6:59 AM MDT | Areal Flood Advisory | GGW | 9 hr |
| Jul 9, 10:40 AM MDT | Areal Flood Advisory | GGW | 5 hr |
| Jul 12, 3:56 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 6:30 PM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| Jul 12, 7:11 PM MDT | Severe Thunderstorm Warning | GGW | 20 min |
| Jul 13, 4:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 7:46 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 14, 6:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 8:24 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 14, 9:18 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jul 14, 10:18 PM MDT | Special Weather Statement | GGW | 57 min |
| Jul 16, 4:31 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 16, 4:55 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 5:25 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 16, 6:30 PM MDT | Special Weather Statement | GGW | 45 min |
| Jul 16, 7:48 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jul 24, 9:05 AM MDT | Special Weather Statement | GGW | 40 min |
| Jul 30, 6:14 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jul 30, 7:29 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 30, 8:10 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 30, 9:31 PM MDT | Special Weather Statement | GGW | 44 min |
| Aug 4, 11:57 PM MDT | Special Weather Statement | GGW | 48 min |
| Aug 11, 3:55 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Aug 11, 5:07 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 7:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 11, 9:36 PM MDT | Special Weather Statement | GGW | 84 min |
| Aug 14, 9:07 PM MDT | Special Weather Statement | GGW | 68 min |
| Aug 14, 9:43 PM MDT | Severe Thunderstorm Warning | GGW | 50 min |
| Aug 22, 5:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 8:43 AM MDT | Special Weather Statement | GGW | 47 min |
| Sep 2, 9:33 AM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| Sep 2, 9:40 AM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Sep 2, 9:54 AM MDT | Mesoscale Discussion | SPC | 96 min |
| Sep 9, 1:56 PM MDT | Flood Watch | GGW | 68 hr |
| Sep 11, 12:27 PM MDT | Areal Flood Advisory | GGW | 22 hr |
| Sep 13, 8:29 PM MDT | Special Weather Statement | GGW | 76 min |
| Sep 19, 9:03 PM MDT | Special Weather Statement | GGW | 57 min |
| Sep 19, 9:17 PM MDT | Severe Thunderstorm Warning | GGW | 43 min |
| Sep 19, 9:46 PM MDT | Severe Thunderstorm Warning | GGW | 44 min |
| Sep 19, 9:56 PM MDT | Special Weather Statement | GGW | 64 min |
| Oct 8, 3:32 AM MDT | Winter Weather Advisory | GGW | 38 hr |
| Nov 8, 2:15 PM MST | Winter Weather Advisory | GGW | 46 hr |
| Nov 10, 9:44 PM MST | Wind Chill Advisory | GGW | 10 hr |
| Nov 13, 7:38 PM MST | Dense Fog Advisory | GGW | 15 hr |
| Nov 14, 2:39 PM MST | Dense Fog Advisory | GGW | 19 hr |
| Nov 18, 2:50 PM MST | Winter Weather Advisory | GGW | 45 hr |
| Nov 26, 2:01 PM MST | Winter Storm Watch | GGW | 38 hr |
| Nov 28, 4:11 AM MST | Winter Weather Advisory | GGW | 61 hr |
| Dec 6, 2:26 PM MST | Winter Weather Advisory | GGW | 53 hr |
| Dec 12, 3:54 PM MST | Winter Weather Advisory | GGW | 5 hr |
| Dec 23, 7:21 PM MST | Dense Fog Advisory | GGW | 15 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 | 26 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 11 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 15 |
| Cold | |
| Wind Chill Warning | 4 |
| Wind Chill Advisory | 20 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.