Alert archive / Montana / Glacier County
Weather alerts in Glacier County, Montana, 2022
149 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Glacier County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 149
- Warnings
- 45
- Watches
- 18
- Advisories
- 32
- Busiest month
- July30 alerts
- Busiest day
- June 18, 202213 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Glacier County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 10 | 50% | 24 | 83% | 28 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: tornado warnings | 0 | 1 | 0% | |||
| NWS Great Falls, MT: severe thunderstorm warnings | 170 | 65 | 62% | 216 | 70% | 23 min |
| NWS Great Falls, MT: flash flood warnings | 3 | 1 | 67% | 5 | 40% | 30 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 |
|---|---|---|---|
| Mar 7, 2:04 PM MST | Special Weather Statement | TFX | 56 min |
| Mar 7, 2:37 PM MST | Snow Squall Warning | TFX | 53 min |
| Mar 7, 2:49 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Mar 15, 5:14 PM MDT | Special Weather Statement | TFX | 31 min |
| Jun 16, 8:28 PM MDT | Special Weather Statement | TFX | 32 min |
| Jun 17, 3:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 4:48 PM MDT | Special Weather Statement | TFX | 27 min |
| Jun 17, 5:57 PM MDT | Special Weather Statement | TFX | 33 min |
| Jun 17, 6:18 PM MDT | Special Weather Statement | TFX | 27 min |
| Jun 17, 6:34 PM MDT | Severe Thunderstorm Warning | TFX | 45 min |
| Jun 17, 7:02 PM MDT | Severe Thunderstorm Warning | TFX | 43 min |
| Jun 18, 1:03 AM MDT | Special Weather Statement | TFX | 27 min |
| Jun 18, 1:14 AM MDT | Severe Thunderstorm Warning | TFX | 31 min |
| Jun 18, 4:17 AM MDT | Special Weather Statement | TFX | 28 min |
| Jun 18, 4:41 AM MDT | Special Weather Statement | TFX | 34 min |
| Jun 18, 11:35 AM MDT | Mesoscale Discussion | SPC | 55 min |
| Jun 18, 12:37 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 1:15 PM MDT | Special Weather Statement | TFX | 30 min |
| Jun 18, 2:15 PM MDT | Special Weather Statement | TFX | 30 min |
| Jun 18, 2:24 PM MDT | Severe Thunderstorm Warning | TFX | 36 min |
| Jun 18, 2:29 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jun 20, 1:39 PM MDT | Areal Flood Advisory | TFX | 20 hr |
| Jun 20, 6:36 PM MDT | Areal Flood Advisory | TFX | 15 hr |
| Jun 28, 7:03 PM MDT | Special Weather Statement | TFX | 27 min |
| Jul 2, 6:01 PM MDT | Special Weather Statement | TFX | 29 min |
| Jul 2, 6:28 PM MDT | Severe Thunderstorm Warning | TFX | 32 min |
| Jul 2, 6:59 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jul 2, 7:44 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jul 2, 8:29 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jul 6, 4:04 PM MDT | Special Weather Statement | TFX | 26 min |
| Jul 7, 1:07 PM MDT | Special Weather Statement | TFX | 23 min |
| Jul 7, 1:27 PM MDT | Severe Thunderstorm Warning | TFX | 63 min |
| Jul 7, 1:41 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 7, 2:30 PM MDT | Special Weather Statement | TFX | 30 min |
| Jul 8, 2:47 PM MDT | Special Weather Statement | TFX | 43 min |
| Jul 8, 3:09 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 6:04 PM MDT | Special Weather Statement | TFX | 41 min |
| Jul 9, 6:42 PM MDT | Special Weather Statement | TFX | 33 min |
| Jul 9, 8:12 PM MDT | Special Weather Statement | TFX | 33 min |
| Jul 18, 2:11 AM MDT | Special Weather Statement | TFX | 34 min |
| Jul 18, 2:25 AM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jul 18, 3:05 AM MDT | Severe Thunderstorm Warning | TFX | 25 min |
| Jul 18, 3:25 AM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jul 18, 4:45 AM MDT | Special Weather Statement | TFX | 30 min |
| Jul 18, 5:14 AM MDT | Special Weather Statement | TFX | 31 min |
| Jul 18, 11:00 AM MDT | Special Weather Statement | MSO | 45 min |
| Jul 18, 11:24 AM MDT | Special Weather Statement | TFX | 36 min |
| Jul 18, 11:31 AM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| Jul 18, 12:41 PM MDT | Severe Thunderstorm Warning | TFX | 49 min |
| Jul 23, 7:18 PM MDT | Special Weather Statement | TFX | 27 min |
| Jul 25, 6:51 PM MDT | Special Weather Statement | TFX | 24 min |
| Jul 25, 7:15 PM MDT | Special Weather Statement | TFX | 45 min |
| Jul 31, 2:27 AM MDT | Fire Weather Watch | TFX | 13 hr |
| Jul 31, 3:05 PM MDT | Red Flag Warning | TFX | 4 days |
| Aug 1, 8:17 AM MDT | Red Flag Warning | MSO | 13 hr |
| Aug 2, 3:15 AM MDT | Red Flag Warning | MSO | 18 hr |
| Aug 12, 2:39 PM MDT | Special Weather Statement | TFX | 36 min |
| Aug 12, 2:51 PM MDT | Areal Flood Advisory | TFX | 114 min |
| Aug 12, 3:08 PM MDT | Special Weather Statement | TFX | 37 min |
| Aug 12, 3:09 PM MDT | Special Weather Statement | TFX | 36 min |
| Aug 12, 3:45 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Aug 12, 3:45 PM MDT | Severe Thunderstorm Warning | TFX | 30 min |
| Aug 12, 4:19 PM MDT | Special Weather Statement | TFX | 26 min |
| Aug 12, 4:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Aug 12, 5:19 PM MDT | Special Weather Statement | TFX | 41 min |
| Aug 12, 5:32 PM MDT | Severe Thunderstorm Warning | TFX | 28 min |
| Aug 12, 5:52 PM MDT | Special Weather Statement | TFX | 23 min |
| Aug 12, 6:17 PM MDT | Special Weather Statement | TFX | 28 min |
| Aug 12, 6:35 PM MDT | Special Weather Statement | TFX | 25 min |
| Aug 21, 5:42 PM MDT | Special Weather Statement | TFX | 33 min |
| Aug 22, 10:54 PM MDT | Special Weather Statement | TFX | 36 min |
| Aug 22, 10:56 PM MDT | Special Weather Statement | TFX | 34 min |
| Aug 22, 11:26 PM MDT | Special Weather Statement | TFX | 34 min |
| Aug 23, 5:37 PM MDT | Areal Flood Advisory | TFX | 89 min |
| Aug 23, 5:48 PM MDT | Special Weather Statement | TFX | 42 min |
| Aug 23, 6:49 PM MDT | Special Weather Statement | TFX | 56 min |
| Aug 23, 7:53 PM MDT | Special Weather Statement | TFX | 52 min |
| Aug 23, 8:24 PM MDT | Special Weather Statement | TFX | 66 min |
| Aug 23, 8:35 PM MDT | Severe Thunderstorm Warning | TFX | 25 min |
| Aug 23, 8:53 PM MDT | Special Weather Statement | TFX | 37 min |
| Aug 23, 9:34 PM MDT | Severe Thunderstorm Warning | TFX | 41 min |
| Aug 23, 9:39 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Aug 23, 11:20 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Aug 25, 2:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 1:07 PM MDT | Fire Weather Watch | TFX | 24 hr |
| Sep 2, 1:00 PM MDT | Red Flag Warning | TFX | 3 days |
| Sep 2, 1:14 PM MDT | Red Flag Warning | MSO | 52 hr |
| Sep 3, 9:25 PM MDT | Special Weather Statement | TFX | 50 min |
| Sep 3, 9:48 PM MDT | Severe Thunderstorm Warning | TFX | 57 min |
| Sep 3, 10:48 PM MDT | Severe Thunderstorm Warning | TFX | 57 min |
| Sep 5, 2:28 AM MDT | Fire Weather Watch | TFX | 25 hr |
| Sep 5, 1:53 PM MDT | Fire Weather Watch | MSO | 13 hr |
| Sep 6, 3:08 AM MDT | Red Flag Warning | MSO | 42 hr |
| Sep 6, 3:26 AM MDT | Red Flag Warning | TFX | 45 hr |
| Oct 19, 2:39 PM MDT | Red Flag Warning | TFX | 28 hr |
| Oct 20, 3:33 AM MDT | Winter Storm Watch | TFX | 35 hr |
| Oct 21, 2:32 AM MDT | Winter Storm Warning | TFX | 69 hr |
| Oct 21, 2:40 PM MDT | Winter Weather Advisory | TFX | 57 hr |
| Oct 25, 1:47 AM MDT | High Wind Watch | TFX | 36 hr |
| Oct 26, 1:51 AM MDT | High Wind Warning | TFX | 46 hr |
| Oct 28, 2:55 AM MDT | High Wind Watch | TFX | 23 hr |
| Oct 28, 1:36 PM MDT | High Wind Warning | TFX | 68 hr |
| Oct 31, 1:59 PM MDT | Winter Storm Watch | TFX | 13 hr |
| Nov 1, 3:02 AM MDT | Winter Storm Warning | TFX | 35 hr |
| Nov 1, 3:02 AM MDT | Winter Weather Advisory | TFX | 42 hr |
| Nov 3, 2:34 AM MDT | High Wind Watch | TFX | 34 hr |
| Nov 3, 2:46 PM MDT | High Wind Warning | TFX | 54 hr |
| Nov 6, 2:13 PM MST | Winter Weather Advisory | TFX | 4 days |
| Nov 7, 2:01 AM MST | Wind Chill Advisory | TFX | 48 hr |
| Nov 10, 1:55 AM MST | Winter Weather Advisory | TFX | 19 hr |
| Nov 15, 1:11 AM MST | Winter Weather Advisory | TFX | 59 hr |
| Nov 22, 1:35 PM MST | Winter Weather Advisory | TFX | 27 hr |
| Nov 25, 3:24 AM MST | Winter Weather Advisory | TFX | 34 hr |
| Nov 25, 12:32 PM MST | Special Weather Statement | TFX | 88 min |
| Nov 25, 1:59 PM MST | Special Weather Statement | TFX | 91 min |
| Nov 25, 2:56 PM MST | Winter Weather Advisory | TFX | 66 hr |
| Nov 25, 4:21 PM MST | High Wind Warning | TFX | 4 hr |
| Nov 25, 10:28 PM MST | High Wind Watch | TFX | 16 hr |
| Nov 26, 2:35 PM MST | High Wind Warning | TFX | 23 hr |
| Nov 28, 12:40 AM MST | Snow Squall Warning | TFX | 65 min |
| Nov 29, 2:38 AM MST | Winter Storm Watch | TFX | 23 hr |
| Nov 29, 1:34 PM MST | Winter Storm Warning | TFX | 65 hr |
| Nov 30, 1:40 AM MST | Winter Weather Advisory | TFX | 50 hr |
| Dec 1, 7:42 AM MST | Wind Chill Advisory | TFX | 49 hr |
| Dec 2, 3:48 AM MST | Winter Weather Advisory | TFX | 35 hr |
| Dec 4, 2:10 PM MST | Winter Weather Advisory | TFX | 57 hr |
| Dec 6, 2:23 PM MST | Blizzard Warning | TFX | 27 hr |
| Dec 6, 2:23 PM MST | Wind Chill Advisory | TFX | 21 hr |
| Dec 6, 2:23 PM MST | Winter Weather Advisory | TFX | 27 hr |
| Dec 10, 1:41 PM MST | Winter Weather Advisory | TFX | 57 hr |
| Dec 13, 2:02 PM MST | Winter Weather Advisory | TFX | 36 hr |
| Dec 16, 3:20 AM MST | Wind Chill Advisory | TFX | 3 days |
| Dec 17, 1:52 AM MST | Winter Weather Advisory | TFX | 58 hr |
| Dec 18, 2:05 AM MST | Wind Chill Watch | TFX | 12 hr |
| Dec 18, 2:28 PM MST | Wind Chill Warning | TFX | 5 days |
| Dec 18, 2:28 PM MST | Winter Storm Watch | TFX | 24 hr |
| Dec 19, 2:39 PM MST | Winter Storm Warning | TFX | 44 hr |
| Dec 19, 2:39 PM MST | Winter Weather Advisory | TFX | 44 hr |
| Dec 22, 2:08 AM MST | Wind Chill Advisory | TFX | 54 hr |
| Dec 22, 2:21 AM MST | High Wind Watch | TFX | 36 hr |
| Dec 23, 2:13 AM MST | Winter Storm Watch | TFX | 12 hr |
| Dec 23, 10:39 AM MST | Winter Weather Advisory | TFX | 25 hr |
| Dec 23, 2:41 PM MST | Blizzard Warning | TFX | 31 hr |
| Dec 23, 2:41 PM MST | Winter Weather Advisory | TFX | 50 hr |
| Dec 24, 1:40 PM MST | High Wind Warning | TFX | 19 hr |
| Dec 26, 1:17 AM MST | High Wind Warning | TFX | 55 hr |
| Dec 26, 10:27 AM MST | Winter Storm Warning | TFX | 46 hr |
| Dec 26, 1:22 PM MST | Winter Weather Advisory | TFX | 12 hr |
| Dec 28, 12:43 AM MST | Winter Weather Advisory | TFX | 27 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 archive20212023
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.