Alert archive / Montana / Glacier County
Weather alerts in Glacier County, Montana, 2023
143 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 143
- Warnings
- 46
- Watches
- 36
- Advisories
- 54
- Busiest month
- February36 alerts
- Busiest day
- February 23, 20236 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, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 1 | 75% | 2 | 50% | 7 min |
| Flash flood warnings | 1 | 0 | 100% | 1 | 0% |
Each office's whole area, 2023
| 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 | 64 | 25 | 61% | 84 | 48% | 15 min |
| NWS Great Falls, MT: flash flood warnings | 14 | 3 | 79% | 9 | 44% | 78 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 5, 7:44 PM MST | Winter Weather Advisory | TFX | 18 hr |
| Jan 15, 5:08 PM MST | Dense Fog Advisory | TFX | 42 hr |
| Jan 18, 2:07 PM MST | High Wind Watch | TFX | 47 hr |
| Jan 20, 2:57 AM MST | Winter Weather Advisory | TFX | 69 hr |
| Jan 20, 1:15 PM MST | High Wind Warning | TFX | 37 hr |
| Jan 25, 2:13 AM MST | Winter Storm Watch | TFX | 33 hr |
| Jan 25, 1:13 PM MST | High Wind Warning | TFX | 29 hr |
| Jan 26, 11:09 AM MST | Winter Storm Warning | TFX | 49 hr |
| Jan 26, 11:09 AM MST | Winter Weather Advisory | TFX | 61 hr |
| Jan 27, 8:37 PM MST | Wind Chill Advisory | TFX | 3 days |
| Jan 29, 8:28 AM MST | Winter Weather Advisory | TFX | 60 hr |
| Jan 30, 2:29 PM MST | High Wind Warning | TFX | 22 hr |
| Feb 1, 1:13 PM MST | Winter Weather Advisory | TFX | 12 hr |
| Feb 2, 1:50 AM MST | High Wind Watch | TFX | 35 hr |
| Feb 3, 2:17 AM MST | High Wind Warning | TFX | 39 hr |
| Feb 3, 2:27 AM MST | Winter Weather Advisory | TFX | 39 hr |
| Feb 4, 2:38 PM MST | High Wind Watch | TFX | 47 hr |
| Feb 5, 11:55 AM MST | High Wind Warning | TFX | 46 hr |
| Feb 6, 1:03 PM MST | Winter Storm Warning | TFX | 50 hr |
| Feb 6, 1:09 PM MST | High Wind Warning | TFX | 54 hr |
| Feb 10, 1:57 PM MST | High Wind Watch | TFX | 23 hr |
| Feb 11, 12:46 PM MST | Winter Storm Watch | TFX | 24 hr |
| Feb 11, 12:51 PM MST | High Wind Warning | TFX | 50 hr |
| Feb 12, 12:30 PM MST | Winter Weather Advisory | TFX | 55 hr |
| Feb 12, 5:19 PM MST | Winter Weather Advisory | TFX | 39 hr |
| Feb 17, 12:45 AM MST | High Wind Warning | TFX | 10 hr |
| Feb 17, 1:34 PM MST | Winter Weather Advisory | TFX | 39 hr |
| Feb 18, 3:30 AM MST | Winter Storm Watch | TFX | 49 hr |
| Feb 18, 12:50 PM MST | Winter Storm Warning | TFX | 4 days |
| Feb 18, 12:50 PM MST | Winter Weather Advisory | TFX | 14 hr |
| Feb 18, 12:53 PM MST | High Wind Warning | TFX | 32 hr |
| Feb 19, 3:17 AM MST | Winter Weather Advisory | TFX | 34 hr |
| Feb 20, 5:14 AM MST | Winter Weather Advisory | TFX | 67 hr |
| Feb 21, 5:49 AM MST | Special Weather Statement | TFX | 41 min |
| Feb 22, 3:54 AM MST | Wind Chill Advisory | TFX | 49 hr |
| Feb 23, 2:44 AM MST | Wind Chill Warning | TFX | 8 hr |
| Feb 23, 2:44 AM MST | Wind Chill Advisory | TFX | 33 hr |
| Feb 23, 2:44 AM MST | Winter Storm Watch | TFX | 12 hr |
| Feb 23, 2:15 PM MST | Wind Chill Warning | TFX | 22 hr |
| Feb 23, 2:15 PM MST | Wind Chill Advisory | TFX | 43 hr |
| Feb 23, 2:15 PM MST | Winter Storm Warning | TFX | 47 hr |
| Feb 24, 3:12 AM MST | Blizzard Warning | TFX | 34 hr |
| Feb 24, 3:12 AM MST | Winter Weather Advisory | TFX | 34 hr |
| Feb 25, 1:34 PM MST | Winter Weather Advisory | TFX | 18 hr |
| Feb 25, 11:10 PM MST | High Wind Warning | TFX | 5 hr |
| Feb 26, 1:59 AM MST | High Wind Watch | TFX | 12 hr |
| Feb 27, 2:25 AM MST | Winter Weather Advisory | TFX | 41 hr |
| Feb 28, 1:14 PM MST | High Wind Watch | TFX | 11 hr |
| Mar 1, 12:14 AM MST | High Wind Warning | TFX | 49 hr |
| Mar 1, 9:52 AM MST | Winter Weather Advisory | TFX | 58 hr |
| Mar 4, 2:13 AM MST | Winter Weather Advisory | TFX | 69 hr |
| Mar 8, 2:31 AM MST | Winter Weather Advisory | TFX | 24 hr |
| Mar 9, 2:59 AM MST | Winter Storm Watch | TFX | 11 hr |
| Mar 9, 2:59 AM MST | Winter Storm Warning | TFX | 48 hr |
| Mar 9, 2:19 PM MST | Winter Weather Advisory | TFX | 49 hr |
| Mar 12, 1:44 PM MDT | High Wind Watch | TFX | 14 hr |
| Mar 13, 3:26 AM MDT | High Wind Warning | TFX | 33 hr |
| Mar 13, 1:59 PM MDT | Winter Storm Watch | TFX | 11 hr |
| Mar 13, 1:59 PM MDT | Winter Storm Warning | TFX | 54 hr |
| Mar 13, 1:59 PM MDT | Winter Weather Advisory | TFX | 19 hr |
| Mar 14, 12:35 AM MDT | Winter Weather Advisory | TFX | 44 hr |
| Mar 18, 1:03 AM MDT | Dense Fog Advisory | TFX | 9 hr |
| Mar 22, 6:45 AM MDT | Dense Fog Advisory | TFX | 4 hr |
| Mar 22, 11:48 PM MDT | Dense Fog Advisory | TFX | 11 hr |
| Mar 30, 1:58 PM MDT | High Wind Watch | TFX | 37 hr |
| Mar 30, 2:34 PM MDT | Winter Storm Watch | TFX | 21 hr |
| Mar 30, 7:52 PM MDT | Dense Fog Advisory | TFX | 15 hr |
| Mar 31, 11:19 AM MDT | Winter Weather Advisory | TFX | 38 hr |
| Apr 1, 3:20 AM MDT | High Wind Warning | TFX | 35 hr |
| Apr 8, 1:51 PM MDT | High Wind Watch | TFX | 13 hr |
| Apr 9, 2:29 AM MDT | High Wind Watch | TFX | 36 hr |
| Apr 9, 2:29 AM MDT | High Wind Warning | TFX | 31 hr |
| Apr 10, 2:25 PM MDT | High Wind Warning | TFX | 30 hr |
| Apr 16, 1:35 AM MDT | High Wind Watch | TFX | 12 hr |
| Apr 17, 1:29 PM MDT | Winter Weather Advisory | TFX | 3 days |
| Apr 19, 12:02 PM MDT | Winter Weather Advisory | TFX | 27 hr |
| Apr 19, 1:22 PM MDT | Winter Weather Advisory | TFX | 29 hr |
| Apr 20, 2:27 PM MDT | Winter Weather Advisory | TFX | 24 hr |
| Jun 6, 12:41 PM MDT | Flood Watch | TFX | 4 days |
| Jun 8, 2:00 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 8, 5:09 PM MDT | Areal Flood Advisory | TFX | 4 hr |
| Jun 8, 5:44 PM MDT | Flash Flood Warning | TFX | 6 hr |
| Jun 8, 11:38 PM MDT | Areal Flood Warning | TFX | 9 hr |
| Jun 10, 2:38 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 10, 4:18 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 10, 5:54 PM MDT | Special Weather Statement | TFX | 36 min |
| Jun 10, 8:15 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Jun 21, 7:37 PM MDT | Areal Flood Advisory | TFX | 118 min |
| Jul 22, 1:18 PM MDT | Fire Weather Watch | TFX | 24 hr |
| Jul 22, 1:24 PM MDT | Fire Weather Watch | MSO | 25 hr |
| Jul 23, 1:02 PM MDT | Red Flag Warning | TFX | 56 hr |
| Jul 23, 2:06 PM MDT | Red Flag Warning | MSO | 34 hr |
| Jul 24, 5:27 PM MDT | Special Weather Statement | TFX | 48 min |
| Jul 26, 2:37 AM MDT | Red Flag Warning | TFX | 18 hr |
| Jul 29, 8:22 PM MDT | Severe Thunderstorm Warning | TFX | 38 min |
| Aug 5, 3:01 AM MDT | Areal Flood Advisory | TFX | 2 hr |
| Aug 9, 4:50 PM MDT | Special Weather Statement | TFX | 40 min |
| Aug 13, 11:56 AM MDT | Fire Weather Watch | TFX | 23 hr |
| Aug 14, 12:23 PM MDT | Fire Weather Watch | TFX | 49 hr |
| Aug 14, 12:27 PM MDT | Fire Weather Watch | MSO | 3 days |
| Aug 15, 12:26 PM MDT | Red Flag Warning | MSO | 3 days |
| Aug 15, 1:04 PM MDT | Heat Advisory | TFX | 3 days |
| Aug 16, 1:09 PM MDT | Fire Weather Watch | TFX | 23 hr |
| Aug 16, 1:09 PM MDT | Red Flag Warning | TFX | 56 hr |
| Aug 16, 1:25 PM MDT | Fire Weather Watch | MSO | 19 hr |
| Aug 18, 1:44 AM MDT | High Wind Warning | TFX | 18 hr |
| Aug 21, 10:39 AM MDT | Flood Watch | TFX | 13 hr |
| Aug 22, 5:20 PM MDT | Special Weather Statement | TFX | 25 min |
| Aug 22, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | 31 min |
| Aug 22, 6:31 PM MDT | Special Weather Statement | TFX | 44 min |
| Aug 22, 6:56 PM MDT | Severe Thunderstorm Warning | TFX | 34 min |
| Aug 22, 7:26 PM MDT | Severe Thunderstorm Warning | TFX | 34 min |
| Aug 29, 2:13 PM MDT | High Wind Warning | TFX | 36 hr |
| Aug 29, 8:02 PM MDT | Special Weather Statement | TFX | 43 min |
| Sep 15, 1:26 PM MDT | Fire Weather Watch | TFX | 13 hr |
| Sep 16, 2:06 AM MDT | Red Flag Warning | TFX | 67 hr |
| Sep 20, 1:34 PM MDT | Winter Weather Advisory | TFX | 28 hr |
| Sep 30, 8:56 AM MDT | Winter Weather Advisory | TFX | 18 hr |
| Oct 13, 4:04 AM MDT | Dense Fog Advisory | TFX | 8 hr |
| Oct 15, 2:03 AM MDT | High Wind Watch | TFX | 32 hr |
| Oct 16, 1:50 AM MDT | High Wind Warning | TFX | 42 hr |
| Oct 22, 1:56 AM MDT | Winter Weather Advisory | TFX | 58 hr |
| Oct 22, 2:06 PM MDT | Winter Storm Watch | TFX | 51 hr |
| Oct 23, 1:12 PM MDT | Winter Storm Warning | TFX | 3 days |
| Oct 23, 1:12 PM MDT | Winter Weather Advisory | TFX | 3 days |
| Nov 9, 1:19 AM MST | High Wind Watch | TFX | 26 hr |
| Nov 10, 2:56 AM MST | High Wind Warning | TFX | 44 hr |
| Nov 10, 2:45 PM MST | Winter Weather Advisory | TFX | 44 hr |
| Nov 13, 12:41 PM MST | Winter Weather Advisory | TFX | 64 hr |
| Nov 19, 1:55 PM MST | High Wind Warning | TFX | 6 hr |
| Nov 20, 12:03 AM MST | High Wind Watch | TFX | 23 hr |
| Nov 20, 11:18 PM MST | High Wind Warning | TFX | 29 hr |
| Nov 21, 1:50 AM MST | Winter Weather Advisory | TFX | 63 hr |
| Nov 30, 11:24 AM MST | Winter Weather Advisory | TFX | 61 hr |
| Nov 30, 11:39 AM MST | High Wind Watch | TFX | 27 hr |
| Dec 1, 2:42 PM MST | High Wind Watch | TFX | 33 hr |
| Dec 1, 2:42 PM MST | High Wind Warning | TFX | 32 hr |
| Dec 2, 2:17 AM MST | High Wind Warning | TFX | 49 hr |
| Dec 4, 3:05 AM MST | High Wind Watch | TFX | 14 hr |
| Dec 4, 5:10 PM MST | High Wind Warning | TFX | 27 hr |
| Dec 6, 2:23 AM MST | Winter Weather Advisory | TFX | 61 hr |
| Dec 7, 12:08 PM MST | High Wind Watch | TFX | 39 hr |
| Dec 10, 12:56 PM MST | Winter Weather Advisory | TFX | 24 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 | 4 |
| Special Weather Statement | 7 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 7 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 8 |
| Winter Weather Advisory | 36 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 24 |
| High Wind Watch | 18 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.