Alert archive / Montana / Custer County
Weather alerts in Custer County, Montana, 2024
117 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Custer County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 117
- Warnings
- 32
- Watches
- 16
- Advisories
- 16
- Busiest month
- August30 alerts
- Busiest day
- August 22, 202413 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Custer County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 19 | 8 | 58% | 20 | 80% | 37 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 Billings, MT: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Billings, MT: severe thunderstorm warnings | 89 | 31 | 65% | 127 | 50% | 23 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 3, 12:23 AM MST | Dense Fog Advisory | BYZ | 11 hr |
| Jan 11, 1:47 AM MST | Winter Weather Advisory | BYZ | 36 hr |
| Jan 12, 1:33 PM MST | Wind Chill Warning | BYZ | 69 hr |
| Jan 14, 1:11 AM MST | Wind Chill Advisory | BYZ | 58 hr |
| Jan 16, 1:08 AM MST | Winter Weather Advisory | BYZ | 59 hr |
| Jan 16, 2:46 PM MST | Winter Storm Warning | BYZ | 45 hr |
| Jan 18, 11:53 AM MST | Wind Chill Advisory | BYZ | 46 hr |
| Jan 21, 9:19 PM MST | Special Weather Statement | BYZ | 3 hr |
| Jan 22, 12:46 AM MST | Dense Fog Advisory | BYZ | 5 hr |
| Jan 22, 11:00 AM MST | Dense Fog Advisory | BYZ | 24 hr |
| Feb 5, 8:41 AM MST | Special Weather Statement | BYZ | 2 hr |
| Feb 7, 2:19 AM MST | Winter Weather Advisory | BYZ | 40 hr |
| Feb 12, 8:59 AM MST | Special Weather Statement | BYZ | 2 hr |
| Mar 21, 2:49 PM MDT | Winter Storm Watch | BYZ | 38 hr |
| Mar 22, 1:40 PM MDT | Winter Storm Warning | BYZ | 50 hr |
| Mar 23, 4:40 AM MDT | Winter Weather Advisory | BYZ | 40 hr |
| May 2, 1:40 PM MDT | Special Weather Statement | BYZ | 3 hr |
| May 5, 2:42 PM MDT | High Wind Warning | BYZ | 63 hr |
| May 5, 6:53 PM MDT | Special Weather Statement | BYZ | 52 min |
| May 13, 10:38 PM MDT | Special Weather Statement | BYZ | 52 min |
| May 17, 1:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| May 17, 1:30 PM MDT | Special Weather Statement | BYZ | 30 min |
| May 17, 1:30 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 17, 2:01 PM MDT | Special Weather Statement | BYZ | 44 min |
| May 17, 6:27 PM MDT | Special Weather Statement | BYZ | 48 min |
| May 17, 7:15 PM MDT | Special Weather Statement | BYZ | 30 min |
| May 29, 12:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 2:10 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 4:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 3, 2:38 PM MDT | High Wind Warning | BYZ | 51 hr |
| Jun 3, 8:21 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jun 4, 1:55 AM MDT | High Wind Watch | BYZ | 12 hr |
| Jun 10, 4:21 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jun 15, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 6:51 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jun 17, 4:32 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 4:36 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jun 22, 1:06 AM MDT | Special Weather Statement | BYZ | 39 min |
| Jun 22, 1:17 AM MDT | Severe Thunderstorm Warning | BYZ | 43 min |
| Jun 22, 1:47 AM MDT | Special Weather Statement | BYZ | 43 min |
| Jun 22, 2:04 AM MDT | Special Weather Statement | BYZ | 26 min |
| Jun 22, 2:31 AM MDT | Areal Flood Advisory | BYZ | 3 hr |
| Jun 22, 2:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 10:20 PM MDT | Special Weather Statement | BYZ | 40 min |
| Jun 23, 11:21 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jun 23, 11:58 PM MDT | Special Weather Statement | BYZ | 32 min |
| Jun 24, 12:40 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 12:18 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 1:02 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 27, 3:09 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jun 27, 3:22 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Jun 27, 3:40 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jun 27, 4:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 27, 4:06 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jun 30, 8:46 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 5, 5:23 PM MDT | Special Weather Statement | BYZ | 37 min |
| Jul 10, 1:30 AM MDT | Heat Advisory | BYZ | 5 days |
| Jul 13, 4:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 5:36 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 13, 6:30 PM MDT | Severe Thunderstorm Warning | BYZ | 30 min |
| Jul 13, 6:55 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jul 13, 6:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 7:49 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 13, 7:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 3:00 AM MDT | Excessive Heat Watch | BYZ | 23 hr |
| Jul 23, 2:26 AM MDT | Excessive Heat Warning | BYZ | 67 hr |
| Jul 23, 2:09 PM MDT | Fire Weather Watch | BYZ | 22 hr |
| Jul 24, 12:27 PM MDT | Red Flag Warning | BYZ | 33 hr |
| Jul 31, 1:00 PM MDT | Excessive Heat Warning | BYZ | 58 hr |
| Aug 2, 12:56 PM MDT | Heat Advisory | BYZ | 31 hr |
| Aug 4, 4:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 4, 10:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Aug 4, 11:29 PM MDT | Special Weather Statement | BYZ | 61 min |
| Aug 6, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 6, 7:33 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Aug 12, 5:06 AM MDT | Special Weather Statement | BYZ | 4 hr |
| Aug 12, 8:50 PM MDT | Special Weather Statement | BYZ | 25 min |
| Aug 16, 5:01 PM MDT | Severe Thunderstorm Warning | BYZ | 44 min |
| Aug 19, 1:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 20, 7:56 PM MDT | Special Weather Statement | BYZ | 34 min |
| Aug 20, 9:10 PM MDT | Special Weather Statement | BYZ | 35 min |
| Aug 21, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 5:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 21, 6:48 PM MDT | Special Weather Statement | BYZ | 27 min |
| Aug 21, 7:12 PM MDT | Special Weather Statement | BYZ | 33 min |
| Aug 21, 7:22 PM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| Aug 21, 7:25 PM MDT | Special Weather Statement | BYZ | 35 min |
| Aug 21, 7:36 PM MDT | Severe Thunderstorm Warning | BYZ | 24 min |
| Aug 21, 7:42 PM MDT | Severe Thunderstorm Warning | BYZ | 33 min |
| Aug 21, 7:48 PM MDT | Special Weather Statement | BYZ | 27 min |
| Aug 21, 7:52 PM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| Aug 21, 7:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 7:55 PM MDT | Severe Thunderstorm Warning | BYZ | 35 min |
| Aug 21, 8:10 PM MDT | Severe Thunderstorm Warning | BYZ | 35 min |
| Aug 21, 8:26 PM MDT | Special Weather Statement | BYZ | 34 min |
| Aug 21, 8:40 PM MDT | Severe Thunderstorm Warning | BYZ | 35 min |
| Aug 23, 2:23 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Aug 23, 4:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 8:35 AM MDT | Special Weather Statement | BYZ | 55 min |
| Sep 11, 2:27 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Sep 12, 12:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 12:59 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 12, 4:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Sep 12, 4:52 PM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| Sep 12, 5:14 PM MDT | Special Weather Statement | BYZ | 31 min |
| Sep 12, 5:33 PM MDT | Severe Thunderstorm Warning | BYZ | 27 min |
| Oct 3, 2:52 AM MDT | High Wind Watch | BYZ | 41 hr |
| Oct 3, 5:36 PM MDT | Red Flag Warning | BYZ | 48 hr |
| Oct 4, 2:15 AM MDT | High Wind Warning | BYZ | 40 hr |
| Oct 4, 2:33 AM MDT | Fire Weather Watch | BYZ | 9 hr |
| Oct 5, 12:20 AM MDT | Special Weather Statement | BYZ | 115 min |
| Dec 8, 2:10 AM MST | Winter Weather Advisory | BYZ | 34 hr |
| Dec 8, 7:59 PM MST | Mesoscale Discussion | SPC | 6 hr |
| Dec 10, 2:49 AM MST | Winter Weather Advisory | BYZ | 33 hr |
| Dec 14, 3:14 AM MST | Winter Weather Advisory | BYZ | 41 hr |
| Dec 17, 2:08 AM MST | High Wind Warning | BYZ | 51 hr |
| Dec 29, 2:26 AM MST | Winter Weather Advisory | BYZ | 39 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 | 19 |
| Severe Thunderstorm Watch | 10 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 34 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
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.