Alert archive / Montana / Prairie County
Weather alerts in Prairie County, Montana, 2013
128 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 128
- Warnings
- 34
- Watches
- 22
- Advisories
- 27
- Busiest month
- July31 alerts
- Busiest day
- August 29, 20139 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 Prairie County in 2013 had a tornado report inside them.
Prairie County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 24 | 15 | 38% | 23 | 65% | 35 min |
| Flash flood warnings | 0 | 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 |
|---|---|---|---|
| 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, 11:20 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 28, 2:37 PM MST | Wind Chill Advisory | GGW | 37 hr |
| Jan 30, 4:08 AM MST | Wind Chill Advisory | GGW | 37 hr |
| Feb 17, 3:13 AM MST | Winter Weather Advisory | GGW | 23 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 15, 9:46 AM MDT | Dense Fog Advisory | GGW | 3 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 20, 2:33 PM MDT | Winter Weather Advisory | GGW | 51 hr |
| Apr 7, 3:16 AM MDT | Winter Storm Watch | GGW | 12 hr |
| Apr 7, 2:44 PM MDT | Winter Storm Warning | 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 20, 4:18 PM MDT | Special Weather Statement | GGW | 42 min |
| Apr 29, 8:03 AM MDT | Red Flag Warning | GGW | 13 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 18, 8:00 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| May 25, 11:43 AM MDT | Mesoscale Discussion | SPC | 92 min |
| May 25, 1:52 PM MDT | Tornado Watch | SPC | 8 hr |
| May 25, 7:26 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| May 25, 7:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| May 25, 8:02 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| May 26, 9:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| May 27, 3:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| May 27, 5:04 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| May 29, 3:24 AM MDT | Flood Watch | GGW | 58 hr |
| May 30, 1:34 AM MDT | Areal Flood Warning | GGW | 49 hr |
| Jun 8, 12:58 AM MDT | Special Weather Statement | GGW | 62 min |
| Jun 11, 1:07 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 11, 6:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 13, 12:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 13, 1:06 PM MDT | Severe Thunderstorm Watch | SPC | 12 hr |
| Jun 13, 1:42 PM MDT | Flash Flood Watch | GGW | 13 hr |
| Jun 13, 4:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 13, 8:06 PM MDT | Mesoscale Discussion | SPC | 54 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 24, 1:21 PM MDT | Mesoscale Discussion | SPC | 114 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 7, 2:34 AM MDT | Special Weather Statement | GGW | 41 min |
| Jul 7, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 6:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 8, 1:23 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 4:10 PM MDT | Severe Thunderstorm Warning | GGW | 65 min |
| Jul 8, 4:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 5:09 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 8, 6:02 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Jul 8, 7:22 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 8, 8:07 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 11, 3:50 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 15, 1:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 15, 2:48 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 15, 6:27 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 20, 4:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 20, 7:39 PM MDT | Severe Thunderstorm Warning | GGW | 51 min |
| Jul 20, 8:29 PM MDT | Tornado Warning | GGW | 31 min |
| Jul 20, 8:57 PM MDT | Severe Thunderstorm Warning | GGW | 48 min |
| Jul 22, 5:32 PM MDT | Severe Thunderstorm Warning | GGW | 43 min |
| Jul 22, 6:08 PM MDT | Severe Thunderstorm Warning | GGW | 37 min |
| Jul 22, 6:39 PM MDT | Severe Thunderstorm Warning | GGW | 66 min |
| Jul 22, 7:31 PM MDT | Severe Thunderstorm Warning | GGW | 29 min |
| Jul 22, 7:55 PM MDT | Special Weather Statement | GGW | 65 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, 7:31 PM MDT | Severe Thunderstorm Warning | GGW | 59 min |
| Jul 24, 7:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 8:27 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 24, 11:31 PM MDT | Mesoscale Discussion | SPC | 29 min |
| Jul 28, 3:56 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 30, 3:37 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| 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, 5:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Aug 3, 7:03 PM MDT | Special Weather Statement | GGW | 57 min |
| Aug 3, 7:42 PM MDT | Special Weather Statement | GGW | 63 min |
| Aug 3, 8:18 PM MDT | Areal Flood Advisory | GGW | 3 hr |
| Aug 5, 2:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 5, 4:35 PM MDT | Severe Thunderstorm Warning | GGW | 55 min |
| Aug 5, 5:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 5:21 PM MDT | Severe Thunderstorm Warning | GGW | 54 min |
| Aug 10, 2:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 12, 2:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 13, 2:22 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 2:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 28, 4:23 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 28, 6:19 PM MDT | Special Weather Statement | BYZ | 56 min |
| Aug 28, 6:26 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Aug 28, 7:52 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Aug 28, 7:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 28, 8:41 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Aug 28, 8:44 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Aug 28, 9:45 PM MDT | Special Weather Statement | GGW | 60 min |
| Aug 28, 10:22 PM MDT | Special Weather Statement | BYZ | 53 min |
| Aug 28, 10:32 PM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Aug 30, 3:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Sep 7, 9:07 AM MDT | Flash Flood Watch | GGW | 37 hr |
| Sep 7, 2:24 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Sep 17, 7:41 PM MDT | Special Weather Statement | GGW | 64 min |
| Oct 27, 2:16 PM MDT | Winter Weather Advisory | GGW | 37 hr |
| Nov 9, 2:47 PM MST | Winter Weather Advisory | GGW | 42 hr |
| Nov 19, 1:59 PM MST | Winter Weather Advisory | GGW | 28 hr |
| Nov 30, 2:01 AM MST | Freezing Rain Advisory | GGW | 9 hr |
| Dec 1, 2:54 AM MST | Winter Storm Watch | GGW | 24 hr |
| Dec 2, 3:06 AM MST | Winter Storm Warning | GGW | 49 hr |
| Dec 3, 9:18 PM MST | Wind Chill Advisory | GGW | 46 hr |
| Dec 4, 10:57 AM MST | Wind Chill Advisory | GGW | 33 hr |
| Dec 6, 3:07 AM MST | Wind Chill Advisory | GGW | 40 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 10, 7:48 PM MST | Wind Chill Advisory | GGW | 16 hr |
| Dec 18, 3:37 AM MST | Winter Weather Advisory | GGW | 34 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.