Alert archive / Montana / Chouteau County
Weather alerts in Chouteau County, Montana, 2023
163 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chouteau County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 163
- Warnings
- 36
- Watches
- 27
- Advisories
- 63
- Busiest month
- June29 alerts
- Busiest day
- July 31, 20237 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Chouteau County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 3 | 75% | 0 | ||
| Flash flood warnings | 2 | 0 | 100% | 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 6, 8:53 AM MST | Ice Storm Warning | TFX | 6 hr |
| Jan 13, 1:39 PM MST | Winter Weather Advisory | TFX | 22 hr |
| Jan 14, 12:53 PM MST | Winter Weather Advisory | TFX | 47 hr |
| Jan 15, 5:08 PM MST | Dense Fog Advisory | TFX | 42 hr |
| Jan 20, 2:57 AM MST | Winter Storm Watch | TFX | 24 hr |
| Jan 20, 2:57 AM MST | Winter Weather Advisory | TFX | 69 hr |
| Jan 25, 2:10 AM MST | High Wind Watch | TFX | 11 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 31, 2:36 PM MST | Winter Weather Advisory | TFX | 10 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 4, 2:37 PM MST | Winter Weather Advisory | TFX | 42 hr |
| Feb 6, 1:48 PM MST | High Wind Watch | TFX | 25 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 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 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, 4:28 AM MST | Special Weather Statement | TFX | 47 min |
| 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, 5:55 AM MST | Wind Chill Advisory | TFX | 23 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 24, 3:12 AM MST | Winter Weather Advisory | TFX | 34 hr |
| Feb 27, 2:25 AM MST | Winter Weather Advisory | TFX | 41 hr |
| Mar 1, 12:14 AM MST | High Wind Warning | TFX | 49 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 10, 2:26 PM MST | Special Weather Statement | TFX | 34 min |
| Mar 10, 4:51 PM MST | Mesoscale Discussion | SPC | 4 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 14, 12:35 AM MDT | Winter Weather Advisory | TFX | 44 hr |
| Mar 19, 2:21 PM MDT | Winter Weather Advisory | TFX | 46 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 24, 2:51 AM MDT | Winter Weather Advisory | TFX | 69 hr |
| Mar 28, 1:54 PM MDT | Winter Weather Advisory | TFX | 56 hr |
| Mar 30, 1:58 PM MDT | High Wind Watch | TFX | 37 hr |
| Mar 30, 7:52 PM MDT | Dense Fog Advisory | TFX | 15 hr |
| Apr 1, 3:20 AM MDT | High Wind Warning | TFX | 35 hr |
| Apr 1, 4:26 PM MDT | Special Weather Statement | TFX | 34 min |
| Apr 1, 5:44 PM MDT | Special Weather Statement | TFX | 61 min |
| Apr 8, 10:23 AM MDT | Flood Watch | TFX | 4 days |
| Apr 8, 5:21 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Apr 8, 8:35 PM MDT | Areal Flood Advisory | TFX | 67 hr |
| Apr 9, 2:29 AM MDT | High Wind Watch | TFX | 36 hr |
| Apr 10, 1:23 PM MDT | Winter Storm Watch | TFX | 25 hr |
| Apr 10, 2:25 PM MDT | High Wind Warning | TFX | 30 hr |
| Apr 11, 2:29 PM MDT | Winter Storm Warning | TFX | 58 hr |
| Apr 11, 2:29 PM MDT | Winter Weather Advisory | TFX | 58 hr |
| Apr 11, 3:15 PM MDT | Areal Flood Advisory | TFX | 70 hr |
| Apr 14, 1:19 PM MDT | Areal Flood Advisory | TFX | 7 days |
| Apr 17, 1:29 PM MDT | Winter Weather Advisory | TFX | 3 days |
| Apr 18, 2:09 AM MDT | Winter Storm Watch | TFX | 12 hr |
| Apr 18, 2:09 AM MDT | Winter Storm Warning | TFX | 64 hr |
| 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 |
| Apr 23, 2:01 AM MDT | Winter Storm Watch | TFX | 25 hr |
| Apr 23, 1:57 PM MDT | Winter Weather Advisory | TFX | 42 hr |
| Apr 26, 2:17 AM MDT | Winter Weather Advisory | TFX | 39 hr |
| May 16, 3:21 PM MDT | Special Weather Statement | TFX | 24 min |
| May 16, 3:50 PM MDT | Special Weather Statement | TFX | 40 min |
| May 16, 4:31 PM MDT | Special Weather Statement | TFX | 44 min |
| May 16, 10:43 PM MDT | Special Weather Statement | TFX | 47 min |
| May 22, 2:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 6:38 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 2, 2:46 PM MDT | Areal Flood Advisory | TFX | 23 hr |
| Jun 5, 1:36 PM MDT | Special Weather Statement | TFX | 39 min |
| Jun 5, 1:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 2:00 PM MDT | Severe Thunderstorm Warning | TFX | 31 min |
| Jun 5, 2:55 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Jun 5, 4:10 PM MDT | Special Weather Statement | TFX | 35 min |
| Jun 5, 9:10 PM MDT | Special Weather Statement | TFX | 50 min |
| Jun 5, 9:42 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Jun 5, 10:28 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 5, 11:26 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Jun 6, 12:41 PM MDT | Flood Watch | TFX | 4 days |
| Jun 7, 1:23 PM MDT | Flash Flood Warning | TFX | 3 hr |
| Jun 7, 2:52 PM MDT | Flash Flood Warning | TFX | 3 hr |
| Jun 23, 2:01 AM MDT | Flood Watch | TFX | 40 hr |
| Jun 24, 1:15 AM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 24, 4:47 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 25, 3:00 PM MDT | Areal Flood Advisory | TFX | 52 min |
| Jun 25, 3:38 PM MDT | Areal Flood Advisory | TFX | 63 min |
| Jun 25, 4:43 PM MDT | Special Weather Statement | TFX | 32 min |
| Jun 25, 5:03 PM MDT | Areal Flood Advisory | TFX | 87 min |
| Jun 26, 1:00 PM MDT | Flood Watch | TFX | 56 hr |
| Jun 26, 2:46 PM MDT | Areal Flood Advisory | TFX | 59 min |
| Jun 26, 7:46 PM MDT | Areal Flood Advisory | TFX | 119 min |
| Jun 26, 7:58 PM MDT | Special Weather Statement | TFX | 47 min |
| Jun 26, 8:03 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 26, 8:08 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jun 26, 8:37 PM MDT | Areal Flood Advisory | TFX | 2 hr |
| Jun 27, 12:41 PM MDT | Areal Flood Advisory | TFX | 3 hr |
| Jul 10, 5:50 PM MDT | Severe Thunderstorm Warning | TFX | 40 min |
| Jul 10, 6:25 PM MDT | Special Weather Statement | TFX | 35 min |
| Jul 10, 7:14 PM MDT | Special Weather Statement | TFX | 46 min |
| Jul 17, 12:28 PM MDT | Special Weather Statement | TFX | 62 min |
| Jul 23, 1:02 PM MDT | Fire Weather Watch | TFX | 24 hr |
| Jul 23, 1:02 PM MDT | Red Flag Warning | TFX | 56 hr |
| Jul 24, 5:09 PM MDT | Special Weather Statement | TFX | 51 min |
| Jul 24, 5:15 PM MDT | Special Weather Statement | TFX | 45 min |
| Jul 29, 6:51 PM MDT | Severe Thunderstorm Warning | TFX | 24 min |
| Jul 29, 7:14 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jul 29, 7:28 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Jul 29, 7:57 PM MDT | Special Weather Statement | TFX | 33 min |
| Jul 30, 6:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 30, 7:59 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jul 30, 8:16 PM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| Jul 30, 8:22 PM MDT | Special Weather Statement | TFX | 23 min |
| Jul 30, 8:42 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Jul 30, 8:56 PM MDT | Severe Thunderstorm Warning | TFX | 49 min |
| Jul 30, 9:22 PM MDT | Severe Thunderstorm Warning | TFX | 38 min |
| Aug 5, 5:04 AM MDT | Areal Flood Advisory | TFX | 5 hr |
| Aug 9, 7:44 PM MDT | Special Weather Statement | TFX | 31 min |
| Aug 9, 8:39 PM MDT | Special Weather Statement | TFX | 36 min |
| Aug 9, 9:32 PM MDT | Special Weather Statement | TFX | 28 min |
| Aug 14, 12:23 PM MDT | Fire Weather Watch | TFX | 49 hr |
| Aug 15, 1:04 PM MDT | Heat Advisory | TFX | 3 days |
| Aug 16, 1:09 PM MDT | Fire Weather Watch | TFX | 23 hr |
| Aug 17, 11:53 AM MDT | Red Flag Warning | TFX | 33 hr |
| Aug 22, 3:54 PM MDT | Special Weather Statement | TFX | 36 min |
| Aug 22, 4:33 PM MDT | Special Weather Statement | TFX | 27 min |
| Aug 29, 6:52 PM MDT | Severe Thunderstorm Warning | TFX | 38 min |
| Aug 29, 7:32 PM MDT | Severe Thunderstorm Warning | TFX | 43 min |
| Aug 29, 9:55 PM MDT | Special Weather Statement | TFX | 35 min |
| Aug 29, 11:02 PM MDT | Special Weather Statement | TFX | 43 min |
| Sep 8, 6:18 AM MDT | Special Weather Statement | TFX | 57 min |
| Sep 16, 2:06 AM MDT | Red Flag Warning | TFX | 67 hr |
| Sep 16, 1:28 PM MDT | Fire Weather Watch | TFX | 13 hr |
| Sep 27, 4:06 PM MDT | Special Weather Statement | TFX | 24 min |
| Sep 27, 4:30 PM MDT | Special Weather Statement | TFX | 30 min |
| Sep 27, 5:01 PM MDT | Special Weather Statement | TFX | 29 min |
| 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, 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 13, 12:41 PM MST | Winter Weather Advisory | TFX | 64 hr |
| Nov 21, 1:50 AM MST | Winter Storm Watch | TFX | 24 hr |
| Nov 21, 1:50 AM MST | Winter Weather Advisory | TFX | 63 hr |
| Dec 1, 2:42 PM MST | High Wind Watch | TFX | 33 hr |
| Dec 2, 2:17 AM MST | High Wind Warning | TFX | 49 hr |
| Dec 6, 2:23 AM MST | Winter Weather Advisory | TFX | 61 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 | 12 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 32 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flood Watch | 4 |
| Areal Flood Advisory | 21 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 11 |
| Winter Weather Advisory | 33 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 9 |
| High Wind Watch | 8 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.