Alert archive / Montana / Custer County
Weather alerts in Custer County, Montana, 2022
133 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 133
- Warnings
- 39
- Watches
- 24
- Advisories
- 27
- Busiest month
- July55 alerts
- Busiest day
- July 5, 202218 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, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 8 | 65% | 5 | 80% | 21 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| 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 | 119 | 52 | 56% | 157 | 65% | 29 min |
| NWS Billings, MT: flash flood warnings | 8 | 3 | 63% | 5 | 100% | 62 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 1, 12:08 AM MST | Special Weather Statement | BYZ | 6 hr |
| Jan 1, 6:13 AM MST | Special Weather Statement | BYZ | 4 hr |
| Jan 3, 11:33 AM MST | Winter Weather Advisory | BYZ | 4 days |
| Jan 5, 3:22 AM MST | Wind Chill Advisory | BYZ | 36 hr |
| Jan 18, 12:18 PM MST | Special Weather Statement | BYZ | 4 hr |
| Jan 18, 1:50 PM MST | Wind Chill Advisory | BYZ | 21 hr |
| Jan 20, 1:37 PM MST | Winter Weather Advisory | BYZ | 19 hr |
| Jan 31, 4:41 PM MST | Special Weather Statement | BYZ | 64 min |
| Jan 31, 5:39 PM MST | Special Weather Statement | BYZ | 66 min |
| Feb 2, 10:33 AM MST | Wind Chill Advisory | BYZ | 22 hr |
| Feb 9, 1:54 PM MST | Special Weather Statement | BYZ | 4 hr |
| Feb 18, 2:40 PM MST | Winter Storm Watch | BYZ | 4 days |
| Feb 19, 2:58 PM MST | Winter Storm Warning | BYZ | 48 hr |
| Feb 19, 2:58 PM MST | Winter Weather Advisory | BYZ | 13 hr |
| Feb 21, 2:58 PM MST | Wind Chill Advisory | BYZ | 68 hr |
| Mar 2, 2:19 AM MST | Winter Weather Advisory | BYZ | 32 hr |
| Mar 3, 2:16 PM MST | Winter Weather Advisory | BYZ | 43 hr |
| Apr 2, 6:22 PM MDT | Special Weather Statement | BYZ | 53 min |
| Apr 3, 1:21 AM MDT | High Wind Watch | BYZ | 50 hr |
| Apr 4, 3:38 AM MDT | High Wind Warning | BYZ | 56 hr |
| Apr 9, 3:14 PM MDT | Winter Storm Watch | BYZ | 36 hr |
| Apr 11, 3:13 AM MDT | Blizzard Warning | BYZ | 3 days |
| Apr 13, 2:12 AM MDT | Winter Weather Advisory | BYZ | 25 hr |
| Apr 20, 3:28 AM MDT | Winter Storm Watch | BYZ | 35 hr |
| Apr 21, 2:43 PM MDT | Blizzard Warning | BYZ | 68 hr |
| Apr 23, 11:32 AM MDT | Mesoscale Discussion | SPC | 5 hr |
| Jun 3, 10:28 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jun 11, 1:15 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 4:59 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 5:22 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Jun 13, 12:52 PM MDT | Special Weather Statement | BYZ | 23 min |
| Jun 13, 7:26 PM MDT | River Flood Watch | BYZ | 41 hr |
| Jun 15, 2:27 AM MDT | High Wind Warning | BYZ | 19 hr |
| Jun 15, 12:14 PM MDT | River Flood Warning | BYZ | 71 hr |
| Jun 16, 2:52 AM MDT | Heat Advisory | BYZ | 66 hr |
| Jun 17, 5:08 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 19, 12:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 1:41 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 5:23 PM MDT | Special Weather Statement | BYZ | 52 min |
| Jul 1, 5:54 PM MDT | Severe Thunderstorm Warning | BYZ | 36 min |
| Jul 1, 6:27 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jul 1, 7:23 PM MDT | Severe Thunderstorm Warning | BYZ | 67 min |
| Jul 2, 1:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 2, 2:20 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 3:54 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 5:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 3, 7:53 PM MDT | Severe Thunderstorm Warning | BYZ | 67 min |
| Jul 3, 7:59 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jul 3, 7:59 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Jul 3, 8:40 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jul 3, 9:41 PM MDT | Severe Thunderstorm Warning | BYZ | 34 min |
| Jul 4, 8:36 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 9:09 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 12:46 AM MDT | Severe Thunderstorm Warning | BYZ | 44 min |
| Jul 5, 12:56 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 1:30 AM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Jul 5, 2:08 AM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Jul 5, 2:19 AM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 5, 2:43 AM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Jul 5, 2:55 AM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jul 5, 2:55 AM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 5, 3:23 AM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 5, 3:55 AM MDT | Areal Flood Advisory | BYZ | 8 hr |
| Jul 5, 3:58 AM MDT | Severe Thunderstorm Warning | BYZ | 77 min |
| Jul 5, 5:07 AM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Jul 5, 5:26 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 6:04 AM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 5, 2:28 PM MDT | Flood Watch | BYZ | 31 hr |
| Jul 5, 5:47 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 6, 7:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 6, 10:58 PM MDT | Special Weather Statement | BYZ | 77 min |
| Jul 7, 9:23 AM MDT | Flood Watch | BYZ | 11 hr |
| Jul 8, 7:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 9, 12:17 AM MDT | Severe Thunderstorm Warning | BYZ | 28 min |
| Jul 9, 6:12 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 9, 7:28 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 9, 10:57 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jul 9, 11:59 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jul 12, 2:11 AM MDT | Heat Advisory | BYZ | 42 hr |
| Jul 13, 4:44 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | 42 min |
| Jul 15, 3:32 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 15, 5:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 15, 5:43 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 15, 6:46 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jul 15, 7:29 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 15, 7:41 PM MDT | Special Weather Statement | BYZ | 64 min |
| Jul 16, 11:45 AM MDT | Heat Advisory | BYZ | 58 hr |
| Jul 18, 11:13 AM MDT | High Wind Warning | BYZ | 27 hr |
| Jul 18, 12:08 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 2:22 AM MDT | Heat Advisory | BYZ | 42 hr |
| Jul 31, 3:02 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Jul 31, 2:29 PM MDT | Red Flag Warning | BYZ | 55 hr |
| Aug 3, 2:09 AM MDT | Heat Advisory | BYZ | 42 hr |
| Aug 3, 2:12 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Aug 12, 5:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 14, 10:29 PM MDT | Special Weather Statement | BYZ | 46 min |
| Aug 14, 11:09 PM MDT | Special Weather Statement | BYZ | 51 min |
| Aug 27, 3:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Sep 2, 1:10 AM MDT | Fire Weather Watch | BYZ | 12 hr |
| Sep 2, 12:42 PM MDT | Red Flag Warning | BYZ | 56 hr |
| Sep 3, 2:27 AM MDT | Heat Advisory | BYZ | 18 hr |
| Sep 5, 2:02 PM MDT | Heat Advisory | BYZ | 53 hr |
| Sep 5, 2:46 PM MDT | Fire Weather Watch | BYZ | 11 hr |
| Sep 6, 2:05 AM MDT | Red Flag Warning | BYZ | 46 hr |
| Sep 22, 1:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Sep 22, 3:51 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Oct 2, 3:22 PM MDT | Special Weather Statement | BYZ | 38 min |
| Oct 2, 3:34 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Oct 2, 4:35 PM MDT | Special Weather Statement | BYZ | 40 min |
| Oct 19, 1:29 AM MDT | Fire Weather Watch | BYZ | 12 hr |
| Oct 19, 1:14 PM MDT | Red Flag Warning | BYZ | 32 hr |
| Oct 22, 2:39 AM MDT | Winter Weather Advisory | BYZ | 56 hr |
| Nov 3, 1:54 PM MDT | High Wind Watch | BYZ | 36 hr |
| Nov 4, 1:42 AM MDT | High Wind Warning | BYZ | 46 hr |
| Nov 7, 12:53 AM MST | Winter Weather Advisory | BYZ | 4 days |
| Nov 11, 4:43 AM MST | Special Weather Statement | BYZ | 2 hr |
| Nov 15, 8:09 PM MST | Special Weather Statement | BYZ | 111 min |
| Nov 17, 1:28 AM MST | Wind Chill Advisory | BYZ | 33 hr |
| Dec 5, 3:00 PM MST | Winter Weather Advisory | BYZ | 44 hr |
| Dec 6, 5:10 AM MST | Special Weather Statement | BYZ | 3 hr |
| Dec 9, 1:30 PM MST | Winter Storm Watch | BYZ | 62 hr |
| Dec 11, 2:40 PM MST | Winter Storm Warning | BYZ | 4 days |
| Dec 14, 2:32 AM MST | Winter Weather Advisory | BYZ | 54 hr |
| Dec 15, 11:34 AM MST | Blizzard Warning | BYZ | 21 hr |
| Dec 18, 1:07 AM MST | Wind Chill Advisory | BYZ | 61 hr |
| Dec 20, 1:06 AM MST | Winter Weather Advisory | BYZ | 64 hr |
| Dec 20, 2:22 PM MST | Wind Chill Warning | BYZ | 70 hr |
| Dec 23, 12:53 PM MST | Wind Chill Advisory | BYZ | 20 hr |
| Dec 24, 1:34 PM MST | High Wind Watch | BYZ | 12 hr |
| Dec 25, 1:56 AM MST | Winter Weather Advisory | BYZ | 13 hr |
| Dec 25, 3:08 AM MST | Special Weather Statement | BYZ | 112 min |
| Dec 26, 5:16 AM MST | Special Weather Statement | BYZ | 3 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 archive20212023
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.