Alert archive / Montana / Roosevelt County
Weather alerts in Roosevelt County, Montana, 2008
111 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 111
- Warnings
- 59
- Watches
- 15
- Advisories
- 25
- Busiest month
- July28 alerts
- Busiest day
- July 23, 20089 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 Roosevelt County in 2008 had a tornado report inside them.
Roosevelt County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 34 | 20 | 41% | 20 | 75% | 22 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Glasgow, MT: tornado warnings | 5 | 0 | 100% | 0 | ||
| NWS Glasgow, MT: severe thunderstorm warnings | 168 | 69 | 59% | 132 | 77% | 23 min |
| NWS Glasgow, MT: flash flood warnings | 3 | 0 | 100% | 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 13, 2:57 PM MST | High Wind Watch | GGW | 37 hr |
| Jan 13, 11:42 PM MST | Dense Fog Advisory | GGW | 10 hr |
| Jan 16, 3:31 AM MST | Winter Storm Watch | GGW | 24 hr |
| Jan 17, 3:45 AM MST | Snow and Blowing Snow Advisory | GGW | 15 hr |
| Jan 17, 6:30 PM MST | Wind Chill Advisory | GGW | 18 hr |
| Jan 19, 3:00 AM MST | Wind Chill Advisory | GGW | 33 hr |
| Jan 21, 8:46 PM MST | Wind Chill Advisory | GGW | 10 hr |
| Jan 22, 2:26 PM MST | Winter Weather Advisory | GGW | 13 hr |
| Jan 27, 3:56 PM MST | Winter Weather Advisory | GGW | 26 hr |
| Jan 27, 9:07 PM MST | Wind Chill Watch | GGW | 18 hr |
| Jan 28, 3:07 PM MST | Wind Chill Warning | GGW | 24 hr |
| Jan 30, 9:03 AM MST | Wind Chill Advisory | GGW | 4 hr |
| Feb 1, 3:28 AM MST | Wind Chill Advisory | GGW | 6 hr |
| Feb 2, 10:54 PM MST | Dense Fog Advisory | GGW | 10 hr |
| Feb 7, 2:47 PM MST | Wind Chill Watch | GGW | 24 hr |
| Feb 8, 2:57 PM MST | Wind Chill Advisory | GGW | 32 hr |
| Feb 8, 8:54 PM MST | Wind Chill Warning | GGW | 14 hr |
| Feb 9, 2:59 PM MST | Wind Chill Warning | GGW | 8 hr |
| Feb 10, 4:09 AM MST | Winter Weather Advisory | GGW | 31 hr |
| Feb 12, 2:37 PM MST | Snow and Blowing Snow Advisory | GGW | 24 hr |
| Feb 16, 12:47 AM MST | Freezing Rain Advisory | GGW | 10 hr |
| Feb 19, 2:45 PM MST | Wind Chill Advisory | GGW | 20 hr |
| Feb 27, 2:40 PM MST | Freezing Rain Advisory | GGW | 12 hr |
| Mar 21, 4:11 AM MDT | Dense Fog Advisory | GGW | 6 hr |
| Mar 23, 3:48 AM MDT | High Wind Watch | GGW | 24 hr |
| Mar 24, 3:39 AM MDT | High Wind Warning | GGW | 14 hr |
| Mar 24, 3:43 AM MDT | Red Flag Warning | GGW | 17 hr |
| Apr 3, 10:11 AM MDT | Red Flag Warning | GGW | 9 hr |
| Apr 13, 2:51 PM MDT | Fire Weather Watch | GGW | 13 hr |
| Apr 14, 3:44 AM MDT | Red Flag Warning | GGW | 17 hr |
| Apr 19, 9:50 AM MDT | Red Flag Warning | GGW | 11 hr |
| Apr 22, 3:08 AM MDT | Red Flag Warning | GGW | 18 hr |
| Apr 28, 2:47 PM MDT | Fire Weather Watch | GGW | 14 hr |
| Apr 29, 4:25 AM MDT | Red Flag Warning | GGW | 18 hr |
| May 15, 3:23 PM MDT | Fire Weather Watch | GGW | 12 hr |
| May 16, 3:35 AM MDT | Red Flag Warning | GGW | 16 hr |
| May 18, 2:56 PM MDT | Fire Weather Watch | GGW | 13 hr |
| May 19, 3:40 AM MDT | Red Flag Warning | GGW | 16 hr |
| Jun 13, 2:53 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Jun 13, 4:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 14, 12:03 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jun 14, 12:54 PM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| Jun 18, 3:37 PM MDT | Severe Thunderstorm Warning | GGW | 23 min |
| Jun 22, 5:47 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jun 22, 6:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 7:11 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jun 22, 7:18 PM MDT | Flash Flood Warning | GGW | 6 hr |
| Jun 22, 8:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 26, 9:12 AM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jun 26, 9:51 AM MDT | Severe Thunderstorm Warning | GGW | 54 min |
| Jun 26, 10:35 AM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jun 26, 11:40 AM MDT | Severe Thunderstorm Warning | GGW | 35 min |
| Jun 26, 7:09 PM MDT | Tornado Warning | GGW | 51 min |
| Jul 10, 9:34 PM MDT | Severe Thunderstorm Warning | GGW | 21 min |
| Jul 19, 10:32 AM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jul 19, 11:30 AM MDT | Severe Thunderstorm Warning | GGW | 60 min |
| Jul 19, 12:10 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 19, 12:29 PM MDT | Severe Thunderstorm Warning | GGW | 16 min |
| Jul 19, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jul 22, 4:57 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 22, 5:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 22, 5:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 22, 5:56 PM MDT | Tornado Warning | GGW | 50 min |
| Jul 22, 6:24 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 22, 7:00 PM MDT | Severe Thunderstorm Warning | GGW | 24 min |
| Jul 22, 7:09 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 22, 8:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 22, 8:13 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jul 22, 9:35 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jul 22, 9:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 22, 10:28 PM MDT | Severe Thunderstorm Warning | GGW | 37 min |
| Jul 23, 1:03 AM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 6:44 PM MDT | Severe Thunderstorm Warning | GGW | 52 min |
| Jul 26, 5:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 26, 6:41 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jul 26, 7:55 PM MDT | Severe Thunderstorm Warning | GGW | 50 min |
| Jul 27, 6:50 AM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 28, 2:02 AM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 28, 3:04 AM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Jul 28, 4:05 AM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Jul 28, 4:57 AM MDT | Severe Thunderstorm Warning | GGW | 48 min |
| Aug 1, 5:19 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Aug 2, 12:19 AM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Aug 2, 8:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 10, 6:53 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Aug 10, 7:33 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Aug 10, 8:26 PM MDT | Severe Thunderstorm Warning | GGW | 27 min |
| Aug 11, 12:45 AM MDT | Severe Thunderstorm Warning | GGW | 39 min |
| Aug 19, 3:28 AM MDT | Red Flag Warning | GGW | 18 hr |
| Aug 25, 3:55 AM MDT | Red Flag Warning | GGW | 20 hr |
| Oct 9, 2:53 PM MDT | Winter Storm Watch | GGW | 24 hr |
| Oct 10, 3:22 PM MDT | Winter Storm Warning | GGW | 60 hr |
| Oct 25, 3:34 AM MDT | High Wind Warning | GGW | 11 hr |
| Nov 14, 1:17 PM MST | Mesoscale Discussion | SPC | 58 min |
| Dec 6, 6:46 PM MST | Freezing Rain Advisory | GGW | 4 hr |
| Dec 7, 4:09 AM MST | Winter Weather Advisory | GGW | 32 hr |
| Dec 7, 5:40 AM MST | Freezing Rain Advisory | GGW | 5 hr |
| Dec 11, 2:37 PM MST | Blizzard Watch | GGW | 24 hr |
| Dec 12, 2:50 PM MST | Blizzard Warning | GGW | 37 hr |
| Dec 13, 3:41 PM MST | Wind Chill Warning | GGW | 42 hr |
| Dec 18, 4:09 AM MST | Wind Chill Advisory | GGW | 11 hr |
| Dec 18, 3:07 PM MST | Wind Chill Warning | GGW | 67 hr |
| Dec 18, 3:07 PM MST | Winter Weather Advisory | GGW | 31 hr |
| Dec 21, 3:06 PM MST | Wind Chill Warning | GGW | 19 hr |
| Dec 21, 3:06 PM MST | Winter Weather Advisory | GGW | 48 hr |
| Dec 22, 9:49 PM MST | Wind Chill Advisory | GGW | 13 hr |
| Dec 28, 3:15 PM MST | Winter Storm Watch | GGW | 12 hr |
| Dec 28, 3:15 PM MST | Freezing Rain Advisory | GGW | 3 hr |
| Dec 28, 3:40 PM MST | Ice Storm Warning | GGW | 3 hr |
| Dec 29, 3:29 AM MST | Winter Storm Warning | GGW | 30 hr |
| Dec 29, 5:46 PM MST | Mesoscale Discussion | SPC | 4 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.