Alert archive / Montana / Powell County
Weather alerts in Powell County, Montana, 2024
113 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Powell County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 113
- Warnings
- 28
- Watches
- 19
- Advisories
- 40
- Busiest month
- August22 alerts
- Busiest day
- August 23, 20247 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Powell County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 4 | 50% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 32 | 19 | 41% | 108 | 44% | 15 min |
| NWS Missoula, MT: flash flood warnings | 4 | 0 | 100% | 2 | 0% |
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 4, 11:07 AM MST | Winter Weather Advisory | MSO | 25 hr |
| Jan 5, 1:08 PM MST | Winter Weather Advisory | MSO | 49 hr |
| Jan 7, 2:57 PM MST | Winter Storm Warning | MSO | 5 days |
| Jan 7, 2:57 PM MST | Winter Weather Advisory | MSO | 68 hr |
| Jan 9, 2:29 PM MST | Winter Storm Watch | MSO | 23 hr |
| Jan 10, 1:13 PM MST | Wind Chill Warning | MSO | 70 hr |
| Jan 10, 1:13 PM MST | Winter Storm Warning | MSO | 46 hr |
| Jan 13, 12:17 PM MST | Wind Chill Warning | MSO | 23 hr |
| Jan 15, 2:11 PM MST | Winter Storm Watch | MSO | 30 hr |
| Jan 15, 2:11 PM MST | Winter Storm Warning | MSO | 67 hr |
| Jan 17, 12:49 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Jan 20, 5:12 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Jan 20, 6:39 PM MST | Winter Storm Warning | MSO | 16 hr |
| Jan 21, 12:56 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Jan 22, 7:16 AM MST | Winter Storm Warning | MSO | 4 hr |
| Jan 22, 12:54 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Feb 2, 3:04 AM MST | Winter Weather Advisory | MSO | 62 hr |
| Feb 6, 11:41 AM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 8, 12:44 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Feb 9, 2:42 PM MST | Special Weather Statement | MSO | 33 min |
| Feb 11, 12:00 PM MST | Winter Weather Advisory | MSO | 65 hr |
| Feb 13, 1:52 PM MST | Winter Weather Advisory | MSO | 66 hr |
| Feb 23, 10:03 AM MST | Winter Storm Watch | MSO | 27 hr |
| Feb 23, 10:44 AM MST | High Wind Watch | MSO | 26 hr |
| Feb 24, 12:44 PM MST | Winter Storm Warning | MSO | 49 hr |
| Feb 24, 1:06 PM MST | High Wind Warning | MSO | 46 hr |
| Feb 26, 10:47 AM MST | Winter Weather Advisory | MSO | 24 hr |
| Feb 28, 10:17 AM MST | High Wind Warning | MSO | 37 hr |
| Feb 28, 10:17 AM MST | Wind Advisory | MSO | 32 hr |
| Feb 29, 10:03 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 29, 6:16 PM MST | Special Weather Statement | MSO | 44 min |
| Mar 1, 1:52 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Mar 2, 7:01 PM MST | Special Weather Statement | MSO | 59 min |
| Mar 20, 11:17 AM MDT | Winter Weather Advisory | MSO | 4 days |
| Mar 23, 5:43 PM MDT | Snow Squall Warning | MSO | 62 min |
| Mar 24, 1:51 PM MDT | Winter Weather Advisory | MSO | 19 hr |
| Apr 5, 12:42 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| Apr 16, 1:26 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Apr 26, 9:06 AM MDT | Winter Weather Advisory | MSO | 27 hr |
| Apr 28, 10:22 AM MDT | Winter Weather Advisory | MSO | 26 hr |
| May 6, 10:13 AM MDT | Wind Advisory | MSO | 35 hr |
| May 6, 12:51 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| May 15, 12:02 PM MDT | Wind Advisory | MSO | 32 hr |
| May 16, 10:04 AM MDT | Wind Advisory | MSO | 34 hr |
| May 17, 4:03 PM MDT | Special Weather Statement | MSO | 42 min |
| May 20, 10:19 AM MDT | Winter Storm Watch | MSO | 46 hr |
| May 22, 8:25 AM MDT | Winter Storm Warning | MSO | 28 hr |
| May 28, 1:13 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 2, 12:20 PM MDT | Wind Advisory | MSO | 33 hr |
| Jun 13, 2:11 PM MDT | Winter Storm Watch | MSO | 71 hr |
| Jun 15, 1:36 PM MDT | Winter Storm Watch | MSO | 24 hr |
| Jun 16, 1:07 PM MDT | Winter Storm Warning | MSO | 41 hr |
| Jun 20, 1:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 11, 2:03 PM MDT | Fire Weather Watch | MSO | 21 hr |
| Jul 12, 10:37 AM MDT | Red Flag Warning | MSO | 34 hr |
| Jul 18, 11:50 AM MDT | Heat Advisory | MSO | 7 days |
| Jul 21, 3:04 PM MDT | Fire Weather Watch | TFX | 71 hr |
| Jul 22, 1:26 PM MDT | Fire Weather Watch | MSO | 25 hr |
| Jul 22, 2:35 PM MDT | Red Flag Warning | TFX | 3 days |
| Jul 23, 2:56 AM MDT | Fire Weather Watch | TFX | 12 hr |
| Jul 23, 2:18 PM MDT | Red Flag Warning | MSO | 31 hr |
| Jul 24, 1:27 PM MDT | Red Flag Warning | MSO | 32 hr |
| Jul 24, 2:23 PM MDT | Red Flag Warning | TFX | 30 hr |
| Jul 24, 8:17 PM MDT | Special Weather Statement | MSO | 28 min |
| Jul 24, 9:28 PM MDT | Severe Thunderstorm Warning | MSO | 32 min |
| Aug 5, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 6, 4:45 PM MDT | Special Weather Statement | MSO | 30 min |
| Aug 6, 5:01 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 6, 5:29 PM MDT | Special Weather Statement | MSO | 31 min |
| Aug 18, 5:06 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 6:08 PM MDT | Special Weather Statement | MSO | 37 min |
| Aug 18, 6:15 PM MDT | Special Weather Statement | MSO | 30 min |
| Aug 19, 2:21 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Aug 19, 2:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 19, 3:01 PM MDT | Special Weather Statement | MSO | 44 min |
| Aug 19, 6:05 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 23, 6:39 AM MDT | Red Flag Warning | TFX | 15 hr |
| Aug 23, 7:04 AM MDT | Red Flag Warning | MSO | 13 hr |
| Aug 23, 2:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 2:54 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 23, 3:19 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 23, 3:54 PM MDT | Special Weather Statement | MSO | 51 min |
| Aug 23, 5:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Aug 26, 10:39 AM MDT | Red Flag Warning | MSO | 34 hr |
| Aug 27, 9:01 AM MDT | Winter Weather Advisory | MSO | 47 hr |
| Aug 28, 12:37 PM MDT | Freeze Warning | MSO | 20 hr |
| Aug 31, 1:20 PM MDT | Fire Weather Watch | MSO | 24 hr |
| Sep 1, 1:03 PM MDT | Red Flag Warning | MSO | 33 hr |
| Sep 3, 12:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Sep 3, 2:07 PM MDT | Special Weather Statement | MSO | 38 min |
| Sep 10, 1:12 PM MDT | Winter Weather Advisory | MSO | 65 hr |
| Sep 11, 1:29 PM MDT | Flood Watch | MSO | 8 hr |
| Sep 11, 4:09 PM MDT | Special Weather Statement | MSO | 36 min |
| Sep 11, 4:11 PM MDT | Special Weather Statement | MSO | 34 min |
| Sep 28, 10:54 AM MDT | Red Flag Warning | MSO | 34 hr |
| Oct 2, 12:48 PM MDT | High Wind Watch | MSO | 24 hr |
| Oct 2, 12:49 PM MDT | Fire Weather Watch | MSO | 23 hr |
| Oct 3, 11:31 AM MDT | Red Flag Warning | MSO | 34 hr |
| Oct 3, 1:00 PM MDT | High Wind Warning | MSO | 37 hr |
| Oct 16, 9:05 AM MDT | Winter Weather Advisory | MSO | 36 hr |
| Oct 18, 7:45 AM MDT | Dense Fog Advisory | MSO | 3 hr |
| Nov 3, 2:29 PM MST | Winter Weather Advisory | MSO | 42 hr |
| Nov 5, 4:50 PM MST | Special Weather Statement | MSO | 40 min |
| Nov 15, 1:38 AM MST | Winter Weather Advisory | MSO | 26 hr |
| Nov 15, 1:01 PM MST | Winter Weather Advisory | MSO | 70 hr |
| Nov 23, 11:10 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Dec 6, 11:09 AM MST | Winter Weather Advisory | MSO | 45 hr |
| Dec 13, 12:43 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 15, 1:45 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Dec 17, 2:31 AM MST | High Wind Watch | MSO | 8 hr |
| Dec 17, 10:15 AM MST | Winter Weather Advisory | MSO | 25 hr |
| Dec 17, 10:55 AM MST | High Wind Warning | MSO | 34 hr |
| Dec 28, 2:19 PM MST | Winter Weather Advisory | MSO | 63 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 | 1 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 10 |
| Special Weather Statement | 16 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 33 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 2 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 3 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 11 |
| Fire Weather Watch | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.