Alert archive / Montana / Prairie County
Weather alerts in Prairie County, Montana, 2019
117 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Prairie County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 117
- Warnings
- 28
- Watches
- 14
- Advisories
- 30
- Busiest month
- July41 alerts
- Busiest day
- July 8, 201911 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Prairie County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 10 | 38% | 11 | 82% | 38 min |
| Flash flood warnings | 2 | 1 | 50% | 2 | 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 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 13, 2:25 PM MST | Wind Chill Advisory | GGW | 21 hr |
| Feb 14, 12:15 PM MST | Winter Weather Advisory | GGW | 30 hr |
| Feb 15, 3:01 PM MST | Winter Weather Advisory | GGW | 48 hr |
| Feb 15, 8:44 PM MST | Winter Storm Warning | GGW | 42 hr |
| Feb 18, 2:37 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 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 19, 5:11 PM MDT | Areal Flood Advisory | GGW | 3 days |
| Mar 22, 9:42 PM MDT | Areal Flood Advisory | GGW | 19 hr |
| Mar 23, 4:24 PM MDT | Areal Flood Advisory | GGW | 4 days |
| Apr 17, 2:59 PM MDT | Special Weather Statement | GGW | 61 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 |
| Jun 14, 12:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 14, 4:44 PM MDT | Special Weather Statement | BYZ | 46 min |
| Jun 14, 5:20 PM MDT | Special Weather Statement | BYZ | 40 min |
| Jun 18, 5:35 PM MDT | Special Weather Statement | GGW | 40 min |
| Jun 19, 6:47 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jun 19, 8:02 PM MDT | Special Weather Statement | GGW | 58 min |
| Jun 20, 4:38 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 20, 8:43 PM MDT | Mesoscale Discussion | SPC | 32 min |
| Jun 27, 11:14 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jun 28, 12:24 AM MDT | Severe Thunderstorm Warning | GGW | 66 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 5, 9:48 AM MDT | Flash Flood Watch | GGW | 12 hr |
| Jul 7, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 7, 7:18 PM MDT | Severe Thunderstorm Warning | GGW | 43 min |
| Jul 7, 7:29 PM MDT | Special Weather Statement | BYZ | 16 min |
| Jul 7, 8:00 PM MDT | Severe Thunderstorm Warning | GGW | 60 min |
| Jul 7, 8:06 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Jul 7, 8:21 PM MDT | Flash Flood Warning | GGW | 3 hr |
| Jul 7, 8:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 12:00 AM MDT | Special Weather Statement | BYZ | 2 hr |
| Jul 8, 3:25 AM MDT | Flash Flood Watch | GGW | 38 hr |
| Jul 8, 12:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 1:25 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 8, 5:24 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 8:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 8, 9:05 PM MDT | Special Weather Statement | GGW | 55 min |
| Jul 9, 12:49 AM MDT | Areal Flood Advisory | GGW | 6 hr |
| Jul 11, 9:13 PM MDT | Severe Thunderstorm Warning | GGW | 21 min |
| Jul 12, 2:07 PM MDT | Special Weather Statement | GGW | 38 min |
| Jul 13, 4:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 8:58 PM MDT | Special Weather Statement | GGW | 47 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, 9:30 PM MDT | Special Weather Statement | GGW | 45 min |
| Jul 14, 9:54 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 14, 11:18 PM MDT | Severe Thunderstorm Warning | GGW | 30 min |
| Jul 16, 12:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 17, 2:41 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 3:51 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 6:00 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 30, 4:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jul 30, 5:08 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 30, 5:14 PM MDT | Special Weather Statement | GGW | 61 min |
| Jul 30, 5:43 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jul 30, 6:37 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 30, 7:18 PM MDT | Severe Thunderstorm Warning | GGW | 57 min |
| Jul 30, 7:29 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 30, 7:30 PM MDT | Severe Thunderstorm Warning | GGW | 29 min |
| Jul 30, 8:11 PM MDT | Flash Flood Warning | GGW | 107 min |
| Jul 30, 9:56 PM MDT | Special Weather Statement | GGW | 49 min |
| Aug 1, 5:22 PM MDT | Special Weather Statement | BYZ | 38 min |
| Aug 4, 4:22 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 4, 5:14 PM MDT | Special Weather Statement | GGW | 46 min |
| Aug 4, 5:29 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Aug 11, 11:47 AM MDT | Special Weather Statement | BYZ | 43 min |
| Aug 11, 11:55 AM MDT | Special Weather Statement | GGW | 50 min |
| Aug 11, 12:15 PM MDT | Mesoscale Discussion | SPC | 90 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, 5:54 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Aug 11, 7:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 11, 8:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Aug 11, 9:40 PM MDT | Special Weather Statement | GGW | 95 min |
| Aug 11, 9:49 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Aug 14, 6:13 PM MDT | Special Weather Statement | GGW | 47 min |
| Aug 14, 6:57 PM MDT | Special Weather Statement | GGW | 78 min |
| Aug 22, 5:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 25, 8:27 PM MDT | Special Weather Statement | GGW | 48 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 17, 5:14 PM MDT | Special Weather Statement | GGW | 46 min |
| Sep 17, 5:45 PM MDT | Severe Thunderstorm Warning | GGW | 60 min |
| Oct 8, 3:32 AM MDT | Winter Storm Watch | GGW | 11 hr |
| Oct 8, 3:32 AM MDT | Winter Storm Warning | GGW | 48 hr |
| Oct 8, 3:32 AM MDT | Winter Weather Advisory | GGW | 38 hr |
| Nov 5, 2:59 AM MST | Winter Weather Advisory | GGW | 30 hr |
| Nov 8, 2:15 PM MST | Winter Weather Advisory | GGW | 46 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 24, 3:01 AM MST | High Wind Warning | GGW | 15 hr |
| Nov 26, 2:01 PM MST | Winter Storm Watch | GGW | 38 hr |
| Nov 28, 4:11 AM MST | Winter Storm Warning | GGW | 64 hr |
| Dec 6, 2:26 PM MST | Winter Weather Advisory | GGW | 53 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 | 6 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 24 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Advisory | 11 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.