Alert archive / Montana / Cascade County
Weather alerts in Cascade County, Montana, 2026
173 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cascade County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 173
- Warnings
- 45
- Watches
- 31
- Advisories
- 27
- Busiest month
- July44 alerts
- Busiest day
- July 18, 202610 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Cascade County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 26 | 13 | 50% | 35 | 74% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: severe thunderstorm warnings | 139 | 59 | 58% | 256 | 70% | 29 min |
| NWS Great Falls, MT: flash flood warnings | 8 | 1 | 88% | 2 | 50% | 1 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 4, 2:29 AM MST | High Wind Watch | TFX | 21 hr |
| Jan 4, 11:46 PM MST | High Wind Watch | TFX | 14 hr |
| Jan 4, 11:46 PM MST | High Wind Warning | TFX | 47 hr |
| Jan 7, 5:49 AM MST | Special Weather Statement | TFX | 41 min |
| Jan 9, 2:06 PM MST | High Wind Watch | TFX | 14 hr |
| Jan 10, 3:48 AM MST | High Wind Warning | TFX | 3 days |
| Jan 23, 11:40 PM MST | Winter Weather Advisory | TFX | 29 hr |
| Jan 25, 1:42 AM MST | Winter Weather Advisory | TFX | 25 hr |
| Feb 8, 12:34 AM MST | Winter Weather Advisory | TFX | 37 hr |
| Feb 15, 12:24 PM MST | Winter Weather Advisory | TFX | 54 hr |
| Feb 16, 1:07 PM MST | High Wind Warning | TFX | 29 hr |
| Feb 17, 9:50 AM MST | Special Weather Statement | TFX | 55 min |
| Feb 17, 11:26 AM MST | Cold Weather Advisory | TFX | 48 hr |
| Feb 17, 11:38 PM MST | Winter Weather Advisory | TFX | 30 hr |
| Feb 21, 10:33 AM MST | High Wind Watch | TFX | 37 hr |
| Feb 22, 12:17 PM MST | Winter Weather Advisory | TFX | 47 hr |
| Feb 22, 11:28 PM MST | High Wind Watch | TFX | 48 hr |
| Feb 24, 1:15 PM MST | High Wind Warning | TFX | 31 hr |
| Feb 24, 11:39 PM MST | High Wind Warning | TFX | 59 hr |
| Feb 26, 10:54 AM MST | Blowing Dust Advisory | TFX | 7 hr |
| Mar 3, 11:27 PM MST | Winter Weather Advisory | TFX | 40 hr |
| Mar 5, 1:09 AM MST | High Wind Watch | TFX | 36 hr |
| Mar 5, 11:28 PM MST | High Wind Watch | TFX | 47 hr |
| Mar 5, 11:28 PM MST | High Wind Warning | TFX | 67 hr |
| Mar 8, 10:36 AM MDT | Blowing Dust Advisory | TFX | 9 hr |
| Mar 8, 6:16 PM MDT | Winter Weather Advisory | TFX | 18 hr |
| Mar 9, 3:35 PM MDT | High Wind Watch | TFX | 22 hr |
| Mar 10, 1:24 PM MDT | High Wind Warning | TFX | 53 hr |
| Mar 10, 2:09 PM MDT | Winter Storm Watch | TFX | 35 hr |
| Mar 10, 2:09 PM MDT | Winter Storm Warning | TFX | 4 days |
| Mar 14, 11:09 AM MDT | Blizzard Warning | TFX | 13 hr |
| Mar 19, 12:43 AM MDT | High Wind Watch | TFX | 14 hr |
| Mar 19, 2:22 PM MDT | High Wind Warning | TFX | 36 hr |
| Mar 26, 3:00 AM MDT | Winter Weather Advisory | TFX | 5 hr |
| Mar 30, 10:33 PM MDT | Winter Storm Watch | TFX | 24 hr |
| Mar 31, 10:48 PM MDT | Winter Storm Warning | TFX | 60 hr |
| Mar 31, 10:48 PM MDT | Winter Weather Advisory | TFX | 60 hr |
| Apr 4, 12:42 PM MDT | High Wind Watch | TFX | 48 hr |
| Apr 5, 11:56 PM MDT | High Wind Warning | TFX | 59 hr |
| Apr 11, 2:28 PM MDT | Special Weather Statement | TFX | 47 min |
| Apr 11, 8:42 PM MDT | Special Weather Statement | TFX | 48 min |
| Apr 14, 1:17 PM MDT | Winter Weather Advisory | TFX | 50 hr |
| Apr 20, 12:51 PM MDT | Winter Storm Watch | TFX | 49 hr |
| Apr 21, 2:20 PM MDT | Winter Weather Advisory | TFX | 4 days |
| Apr 21, 11:56 PM MDT | Winter Storm Warning | TFX | 3 days |
| Apr 22, 6:18 PM MDT | Special Weather Statement | TFX | 42 min |
| Apr 24, 10:16 PM MDT | Special Weather Statement | TFX | 74 min |
| Apr 25, 4:46 AM MDT | Special Weather Statement | TFX | 89 min |
| Apr 25, 6:45 AM MDT | Special Weather Statement | TFX | 60 min |
| May 11, 11:39 PM MDT | High Wind Watch | TFX | 37 hr |
| May 12, 11:48 PM MDT | High Wind Warning | TFX | 44 hr |
| May 13, 12:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 13, 12:50 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 13, 1:59 PM MDT | Severe Thunderstorm Warning | TFX | 35 min |
| May 13, 2:33 PM MDT | Special Weather Statement | TFX | 27 min |
| May 13, 2:46 PM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| May 13, 2:50 PM MDT | Severe Thunderstorm Warning | TFX | 40 min |
| May 13, 3:28 PM MDT | Severe Thunderstorm Warning | TFX | 47 min |
| May 13, 6:51 PM MDT | Special Weather Statement | TFX | 39 min |
| May 15, 11:59 AM MDT | Winter Weather Advisory | TFX | 60 hr |
| May 27, 1:28 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| May 28, 1:29 PM MDT | Special Weather Statement | TFX | 46 min |
| May 28, 2:37 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| May 28, 4:06 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| May 28, 10:46 PM MDT | Special Weather Statement | TFX | 44 min |
| May 28, 11:11 PM MDT | Areal Flood Advisory | TFX | 67 min |
| May 29, 1:22 PM MDT | Flood Watch | TFX | 45 hr |
| May 29, 1:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| May 29, 3:57 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| May 31, 10:49 AM MDT | Areal Flood Advisory | TFX | 13 hr |
| Jun 8, 12:01 PM MDT | High Wind Watch | TFX | 39 hr |
| Jun 12, 2:25 PM MDT | Special Weather Statement | TFX | 50 min |
| Jun 12, 3:09 PM MDT | Special Weather Statement | TFX | 51 min |
| Jun 17, 3:28 PM MDT | Special Weather Statement | TFX | 32 min |
| Jun 25, 2:06 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 25, 2:06 PM MDT | Severe Thunderstorm Warning | TFX | 39 min |
| Jun 25, 2:16 PM MDT | Special Weather Statement | TFX | 44 min |
| Jun 25, 2:20 PM MDT | Special Weather Statement | TFX | 40 min |
| Jun 25, 3:11 PM MDT | Special Weather Statement | TFX | 49 min |
| Jul 1, 1:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 3:23 PM MDT | Special Weather Statement | TFX | 52 min |
| Jul 8, 4:51 PM MDT | Special Weather Statement | TFX | 39 min |
| Jul 8, 5:25 PM MDT | Special Weather Statement | TFX | 50 min |
| Jul 9, 12:28 PM MDT | Heat Advisory | TFX | 4 days |
| Jul 12, 5:01 PM MDT | Special Weather Statement | TFX | 44 min |
| Jul 12, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | 34 min |
| Jul 12, 5:32 PM MDT | Severe Thunderstorm Warning | TFX | 58 min |
| Jul 12, 6:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 2:16 PM MDT | Flood Watch | TFX | 34 hr |
| Jul 14, 5:37 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 6:42 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 16, 2:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 16, 2:10 PM MDT | Severe Thunderstorm Warning | TFX | 35 min |
| Jul 16, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jul 16, 4:29 PM MDT | Severe Thunderstorm Warning | TFX | 61 min |
| Jul 16, 5:23 PM MDT | Severe Thunderstorm Warning | TFX | 36 min |
| Jul 17, 3:36 PM MDT | Severe Thunderstorm Warning | TFX | 24 min |
| Jul 17, 5:08 PM MDT | Special Weather Statement | TFX | 52 min |
| Jul 17, 5:49 PM MDT | Special Weather Statement | TFX | 41 min |
| Jul 17, 6:47 PM MDT | Special Weather Statement | TFX | 43 min |
| Jul 17, 6:58 PM MDT | Severe Thunderstorm Warning | TFX | 32 min |
| Jul 17, 8:08 PM MDT | Special Weather Statement | TFX | 52 min |
| Jul 17, 8:35 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jul 18, 1:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 3:39 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 5:00 PM MDT | Severe Thunderstorm Warning | TFX | 45 min |
| Jul 18, 5:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 18, 5:41 PM MDT | Special Weather Statement | TFX | 49 min |
| Jul 18, 5:56 PM MDT | Special Weather Statement | TFX | 49 min |
| Jul 18, 6:02 PM MDT | Severe Thunderstorm Warning | TFX | 43 min |
| Jul 18, 6:21 PM MDT | Severe Thunderstorm Warning | TFX | 24 min |
| Jul 22, 10:21 AM MDT | Extreme Heat Watch | TFX | 27 hr |
| Jul 23, 12:31 AM MDT | Fire Weather Watch | TFX | 13 hr |
| Jul 23, 12:51 PM MDT | Heat Advisory | TFX | 3 days |
| Jul 23, 12:51 PM MDT | Extreme Heat Warning | TFX | 3 days |
| Jul 23, 1:57 PM MDT | Red Flag Warning | TFX | 55 hr |
| Jul 25, 2:53 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 3:57 PM MDT | Special Weather Statement | TFX | 48 min |
| Jul 29, 10:46 AM MDT | Fire Weather Watch | TFX | 48 hr |
| Jul 30, 12:16 AM MDT | Extreme Heat Watch | TFX | 36 hr |
| Jul 31, 11:01 AM MDT | Red Flag Warning | TFX | 64 hr |
| Jul 31, 12:06 PM MDT | Heat Advisory | TFX | 39 hr |
| Jul 31, 12:06 PM MDT | Extreme Heat Warning | TFX | 48 hr |
| Aug 6, 1:14 PM MDT | Fire Weather Watch | TFX | 10 hr |
| Aug 6, 10:51 PM MDT | Red Flag Warning | TFX | 46 hr |
| Aug 16, 3:48 PM MDT | Special Weather Statement | TFX | 42 min |
| Aug 17, 2:10 PM MDT | Special Weather Statement | TFX | 50 min |
| Aug 17, 2:21 PM MDT | Severe Thunderstorm Warning | TFX | 39 min |
| Aug 17, 3:23 PM MDT | Special Weather Statement | TFX | 52 min |
| Aug 17, 3:47 PM MDT | Severe Thunderstorm Warning | TFX | 43 min |
| Aug 17, 4:26 PM MDT | Special Weather Statement | TFX | 49 min |
| Aug 18, 3:12 PM MDT | Special Weather Statement | TFX | 48 min |
| Aug 23, 1:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Aug 23, 1:59 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 26, 6:01 PM MDT | Special Weather Statement | TFX | 44 min |
| Aug 26, 6:45 PM MDT | Special Weather Statement | TFX | 45 min |
| Aug 26, 7:34 PM MDT | Special Weather Statement | TFX | 41 min |
| Aug 27, 1:04 PM MDT | Special Weather Statement | TFX | 41 min |
| Aug 27, 2:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Aug 27, 4:52 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 27, 5:06 PM MDT | Special Weather Statement | TFX | 24 min |
| Aug 27, 5:21 PM MDT | Severe Thunderstorm Warning | TFX | 54 min |
| Aug 27, 6:03 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Aug 27, 7:19 PM MDT | Special Weather Statement | TFX | 41 min |
| Aug 29, 2:56 PM MDT | Special Weather Statement | TFX | 34 min |
| Aug 29, 3:26 PM MDT | Special Weather Statement | TFX | 34 min |
| Aug 29, 10:55 PM MDT | Special Weather Statement | TFX | 50 min |
| Sep 2, 11:49 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 1:35 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 2, 2:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Sep 2, 2:57 PM MDT | Severe Thunderstorm Warning | TFX | 63 min |
| Sep 2, 3:22 PM MDT | Severe Thunderstorm Warning | TFX | 53 min |
| Sep 2, 3:59 PM MDT | Severe Thunderstorm Warning | TFX | 61 min |
| Sep 2, 4:13 PM MDT | Severe Thunderstorm Warning | TFX | 62 min |
| Sep 5, 6:54 PM MDT | Special Weather Statement | TFX | 36 min |
| Sep 5, 8:37 PM MDT | Special Weather Statement | TFX | 38 min |
| Sep 6, 4:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Sep 6, 5:53 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 6, 6:42 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Sep 6, 7:13 PM MDT | Severe Thunderstorm Warning | TFX | 25 min |
| Sep 6, 7:23 PM MDT | Severe Thunderstorm Warning | TFX | 67 min |
| Sep 6, 7:44 PM MDT | Special Weather Statement | TFX | 31 min |
| Sep 6, 8:18 PM MDT | Special Weather Statement | TFX | 42 min |
| Sep 7, 7:11 AM MDT | Special Weather Statement | TFX | 64 min |
| Sep 7, 7:59 AM MDT | Areal Flood Advisory | TFX | 2 hr |
| Sep 13, 5:40 PM MDT | Special Weather Statement | TFX | 35 min |
| Sep 13, 6:22 PM MDT | Special Weather Statement | TFX | 38 min |
| Sep 13, 6:49 PM MDT | Special Weather Statement | TFX | 41 min |
| Sep 13, 7:37 PM MDT | Special Weather Statement | TFX | 38 min |
| Sep 13, 8:23 PM MDT | Special Weather Statement | TFX | 37 min |
| Sep 13, 8:35 PM MDT | Special Weather Statement | TFX | 40 min |
| Sep 13, 9:32 PM MDT | Special Weather Statement | TFX | 28 min |
| Sep 17, 10:18 AM MDT | Flash Flood Watch | TFX | 51 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 archive2025
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.