Alert archive / Montana / Roosevelt County
Weather alerts in Roosevelt County, Montana, 2013
146 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 146
- Warnings
- 47
- Watches
- 20
- Advisories
- 45
- Busiest month
- July39 alerts
- Busiest day
- July 15, 201310 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
4 of 4 tornado warnings covering Roosevelt County in 2013 had a tornado report inside them; 5 of 5 tornado reports fell inside a warning, on average 12 minutes after it went out.
Roosevelt County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 4 | 0% | 5 | 100% | 12 min |
| Severe thunderstorm warnings | 28 | 21 | 25% | 9 | 89% | 26 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Glasgow, MT: tornado warnings | 8 | 4 | 50% | 5 | 100% | 12 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 147 | 84 | 43% | 196 | 76% | 27 min |
| NWS Glasgow, MT: flash flood warnings | 21 | 3 | 86% | 5 | 60% | 36 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 |
|---|---|---|---|
| Dec 31, 9:22 PM MST | Dense Fog Advisory | GGW | 9 hr |
| Jan 9, 2:41 AM MST | Winter Storm Watch | GGW | 25 hr |
| Jan 9, 2:45 PM MST | Winter Storm Warning | GGW | 60 hr |
| Jan 11, 11:44 AM MST | Blizzard Warning | GGW | 15 hr |
| Jan 11, 11:20 PM MST | Wind Chill Advisory | GGW | 12 hr |
| Jan 14, 2:33 PM MST | Winter Weather Advisory | GGW | 23 hr |
| Jan 19, 3:17 AM MST | Wind Chill Advisory | GGW | 51 hr |
| Jan 24, 8:20 AM MST | Freezing Rain Advisory | GGW | 3 hr |
| Jan 26, 3:17 AM MST | Freezing Rain Advisory | GGW | 31 hr |
| Jan 28, 2:37 PM MST | Wind Chill Advisory | GGW | 37 hr |
| Jan 30, 4:08 AM MST | Wind Chill Warning | GGW | 30 hr |
| Jan 30, 4:08 AM MST | Wind Chill Advisory | GGW | 37 hr |
| Feb 2, 8:59 AM MST | Winter Weather Advisory | GGW | 8 hr |
| Feb 7, 1:20 AM MST | Dense Fog Advisory | GGW | 13 hr |
| Feb 12, 2:14 PM MST | Winter Weather Advisory | GGW | 40 hr |
| Feb 17, 3:13 AM MST | Winter Weather Advisory | GGW | 23 hr |
| Feb 18, 2:26 PM MST | Wind Chill Advisory | GGW | 37 hr |
| Mar 2, 2:30 PM MST | Winter Storm Watch | GGW | 14 hr |
| Mar 3, 4:02 AM MST | Winter Storm Warning | GGW | 40 hr |
| Mar 3, 4:02 AM MST | Winter Weather Advisory | GGW | 34 hr |
| Mar 4, 3:12 AM MST | Blizzard Warning | GGW | 17 hr |
| Mar 11, 5:07 PM MDT | Winter Weather Advisory | GGW | 11 hr |
| Mar 14, 3:22 AM MDT | Winter Weather Advisory | GGW | 34 hr |
| Mar 15, 2:22 PM MDT | Winter Storm Watch | GGW | 24 hr |
| Mar 16, 2:47 PM MDT | Winter Storm Warning | GGW | 36 hr |
| Mar 18, 2:34 AM MDT | Wind Chill Advisory | GGW | 8 hr |
| Mar 20, 2:33 PM MDT | Winter Weather Advisory | GGW | 51 hr |
| Mar 29, 5:38 AM MDT | Freezing Rain Advisory | GGW | 6 hr |
| Apr 4, 2:33 PM MDT | Freezing Rain Advisory | GGW | 18 hr |
| Apr 6, 2:49 AM MDT | Freezing Rain Advisory | GGW | 31 hr |
| Apr 7, 2:44 PM MDT | Winter Weather Advisory | GGW | 23 hr |
| Apr 12, 3:34 AM MDT | Winter Storm Watch | GGW | 24 hr |
| Apr 13, 3:37 AM MDT | Winter Storm Warning | GGW | 48 hr |
| Apr 29, 8:03 AM MDT | Red Flag Warning | GGW | 13 hr |
| May 9, 3:40 PM MDT | Fire Weather Watch | GGW | 12 hr |
| May 10, 3:29 AM MDT | Red Flag Warning | GGW | 15 hr |
| May 11, 2:18 PM MDT | Fire Weather Watch | GGW | 37 hr |
| May 12, 2:08 PM MDT | Fire Weather Watch | GGW | 25 hr |
| May 13, 2:46 PM MDT | Red Flag Warning | GGW | 28 hr |
| May 13, 7:40 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| May 25, 11:43 AM MDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 5:33 PM MDT | Severe Thunderstorm Warning | GGW | 42 min |
| May 25, 6:14 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| May 25, 7:12 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| May 25, 8:13 PM MDT | Flash Flood Warning | GGW | 3 hr |
| May 27, 7:01 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| May 29, 3:24 AM MDT | Flood Watch | GGW | 58 hr |
| Jun 2, 2:37 PM MDT | Flood Watch | GGW | 37 hr |
| Jun 3, 9:25 AM MDT | Areal Flood Advisory | GGW | 24 hr |
| Jun 3, 8:26 PM MDT | Areal Flood Warning | GGW | 17 hr |
| Jun 13, 8:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 14, 1:26 PM MDT | Special Weather Statement | GGW | 49 min |
| Jun 19, 8:25 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 10:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 19, 11:42 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jun 19, 11:44 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jun 20, 12:57 AM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 20, 1:10 AM MDT | Special Weather Statement | GGW | 65 min |
| Jun 20, 1:32 AM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jun 20, 2:38 AM MDT | Special Weather Statement | GGW | 37 min |
| Jun 21, 7:20 PM MDT | Special Weather Statement | GGW | 55 min |
| Jun 24, 6:39 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 24, 7:01 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 9:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jun 25, 1:06 AM MDT | Mesoscale Discussion | SPC | 54 min |
| Jul 3, 3:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 5, 4:02 PM MDT | Special Weather Statement | GGW | 28 min |
| Jul 5, 6:09 PM MDT | Special Weather Statement | GGW | 66 min |
| Jul 8, 12:19 AM MDT | Severe Thunderstorm Warning | GGW | 26 min |
| Jul 8, 12:41 AM MDT | Special Weather Statement | GGW | 64 min |
| Jul 8, 1:57 AM MDT | Areal Flood Advisory | GGW | 3 hr |
| Jul 8, 12:54 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 8, 1:23 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 4:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 3:50 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 3:25 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 15, 1:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 15, 2:48 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 15, 3:14 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jul 15, 3:45 PM MDT | Tornado Warning | GGW | 30 min |
| Jul 15, 3:58 PM MDT | Tornado Warning | GGW | 32 min |
| Jul 15, 4:19 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Jul 15, 4:25 PM MDT | Tornado Warning | GGW | 35 min |
| Jul 15, 4:39 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 15, 4:53 PM MDT | Tornado Warning | GGW | 37 min |
| Jul 15, 5:13 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jul 15, 6:12 PM MDT | Special Weather Statement | GGW | 63 min |
| Jul 15, 6:27 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 15, 6:50 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Jul 15, 6:56 PM MDT | Severe Thunderstorm Warning | GGW | 19 min |
| Jul 15, 7:23 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Jul 20, 4:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 20, 4:57 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 20, 5:31 PM MDT | Special Weather Statement | GGW | 59 min |
| Jul 20, 5:58 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jul 20, 6:02 PM MDT | Special Weather Statement | GGW | 58 min |
| Jul 24, 1:21 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 24, 2:39 PM MDT | Severe Thunderstorm Warning | GGW | 51 min |
| Jul 24, 3:28 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jul 24, 4:22 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 24, 5:08 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 24, 5:26 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 5:29 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Aug 3, 1:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 3, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 3, 8:35 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Aug 4, 4:55 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Aug 4, 5:23 PM MDT | Special Weather Statement | GGW | 52 min |
| Aug 5, 4:17 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Aug 5, 5:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 5:09 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Aug 5, 5:38 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Aug 5, 6:10 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Aug 6, 4:25 PM MDT | Special Weather Statement | GGW | 65 min |
| Aug 6, 5:25 PM MDT | Special Weather Statement | GGW | 65 min |
| Aug 10, 2:33 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Aug 10, 2:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 13, 2:22 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 4:23 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 28, 7:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 28, 9:28 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Aug 28, 10:04 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Sep 1, 6:27 AM MDT | Dense Fog Advisory | GGW | 3 hr |
| Sep 7, 9:07 AM MDT | Flash Flood Watch | GGW | 37 hr |
| Nov 16, 2:54 PM MST | Winter Weather Advisory | GGW | 18 hr |
| Nov 30, 2:01 AM MST | Freezing Rain Advisory | GGW | 9 hr |
| Nov 30, 6:57 PM MST | Freezing Rain Advisory | GGW | 13 hr |
| Dec 1, 2:54 AM MST | Winter Storm Watch | GGW | 24 hr |
| Dec 1, 2:59 PM MST | Freezing Rain Advisory | GGW | 20 hr |
| Dec 2, 3:06 AM MST | Winter Storm Warning | GGW | 49 hr |
| Dec 3, 9:52 AM MST | Winter Weather Advisory | GGW | 11 hr |
| Dec 3, 9:18 PM MST | Wind Chill Advisory | GGW | 46 hr |
| Dec 6, 3:07 AM MST | Wind Chill Advisory | GGW | 40 hr |
| Dec 6, 2:09 PM MST | Wind Chill Warning | GGW | 21 hr |
| Dec 7, 11:01 AM MST | Wind Chill Warning | GGW | 23 hr |
| Dec 7, 11:01 AM MST | Wind Chill Advisory | GGW | 48 hr |
| Dec 8, 2:15 PM MST | Winter Weather Advisory | GGW | 30 hr |
| Dec 9, 7:58 PM MST | Wind Chill Advisory | GGW | 7 hr |
| Dec 10, 7:48 PM MST | Wind Chill Advisory | GGW | 16 hr |
| Dec 18, 3:37 AM MST | Wind Chill Advisory | GGW | 31 hr |
| Dec 20, 2:25 PM MST | Winter Weather Advisory | GGW | 30 hr |
| Dec 22, 2:30 PM MST | Winter Weather Advisory | GGW | 36 hr |
| Dec 27, 3:01 PM MST | Wind Chill Advisory | GGW | 36 hr |
| Dec 28, 9:42 AM MST | Winter Weather Advisory | GGW | 5 hr |
| Dec 30, 3:20 AM MST | Winter Weather Advisory | GGW | 55 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 archive20122014
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.