Alert archive / Montana / Treasure County
Weather alerts in Treasure County, Montana, 2020
74 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Treasure County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 74
- Warnings
- 20
- Watches
- 15
- Advisories
- 10
- Busiest month
- July11 alerts
- Busiest day
- July 7, 20204 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Treasure County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 3 | 100% | 56 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: severe thunderstorm warnings | 71 | 41 | 42% | 143 | 55% | 29 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 2, 12:29 PM MST | High Wind Watch | BYZ | 23 hr |
| Jan 3, 2:58 AM MST | High Wind Warning | BYZ | 48 hr |
| Jan 7, 1:13 PM MST | Special Weather Statement | BYZ | 3 hr |
| Jan 13, 3:37 AM MST | Dense Fog Advisory | BYZ | 5 hr |
| Jan 27, 7:47 AM MST | Special Weather Statement | BYZ | 118 min |
| Jan 30, 4:41 AM MST | Special Weather Statement | BYZ | 94 min |
| Feb 8, 2:05 AM MST | Winter Weather Advisory | BYZ | 30 hr |
| Feb 17, 3:57 PM MST | Special Weather Statement | BYZ | 33 min |
| Feb 23, 3:11 PM MST | Winter Weather Advisory | BYZ | 43 hr |
| Feb 23, 10:45 PM MST | Special Weather Statement | BYZ | 90 min |
| Feb 24, 1:48 AM MST | Special Weather Statement | BYZ | 102 min |
| Feb 24, 3:39 AM MST | Special Weather Statement | BYZ | 111 min |
| Mar 2, 3:08 AM MST | High Wind Warning | BYZ | 65 hr |
| Mar 3, 3:25 AM MST | Red Flag Warning | BYZ | 39 hr |
| Mar 12, 2:57 PM MDT | Winter Weather Advisory | BYZ | 3 days |
| Mar 25, 5:23 PM MDT | Special Weather Statement | BYZ | 52 min |
| Apr 9, 3:21 AM MDT | Winter Storm Watch | BYZ | 24 hr |
| Apr 10, 3:01 AM MDT | Winter Weather Advisory | BYZ | 56 hr |
| May 3, 2:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 3:38 PM MDT | Special Weather Statement | BYZ | 82 min |
| May 3, 4:03 PM MDT | Special Weather Statement | BYZ | 42 min |
| May 5, 2:45 PM MDT | High Wind Watch | BYZ | 20 hr |
| May 6, 3:46 AM MDT | High Wind Warning | BYZ | 35 hr |
| May 20, 1:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 20, 3:11 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 20, 6:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 3, 2:47 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 3, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | 15 min |
| Jul 4, 11:02 PM MDT | Special Weather Statement | BYZ | 43 min |
| Jul 6, 1:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 6, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 2:54 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jul 7, 12:47 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 1:14 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 5:13 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 7, 5:41 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jul 23, 1:56 PM MDT | Fire Weather Watch | BYZ | 24 hr |
| Aug 3, 12:20 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Aug 6, 6:21 PM MDT | Special Weather Statement | BYZ | 39 min |
| Aug 11, 1:49 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Aug 16, 1:02 PM MDT | Heat Advisory | BYZ | 55 hr |
| Aug 17, 2:11 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Aug 20, 9:59 PM MDT | Special Weather Statement | BYZ | 46 min |
| Aug 25, 5:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 25, 8:52 PM MDT | Special Weather Statement | BYZ | 53 min |
| Aug 30, 2:17 PM MDT | Fire Weather Watch | BYZ | 13 hr |
| Aug 31, 3:27 AM MDT | Red Flag Warning | BYZ | 69 hr |
| Sep 3, 3:14 AM MDT | Fire Weather Watch | BYZ | 32 hr |
| Sep 4, 11:14 AM MDT | Red Flag Warning | BYZ | 57 hr |
| Sep 12, 2:46 AM MDT | Fire Weather Watch | BYZ | 24 hr |
| Sep 13, 3:11 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Sep 18, 1:53 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Sep 22, 1:46 PM MDT | Fire Weather Watch | BYZ | 24 hr |
| Sep 23, 1:22 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Sep 25, 10:53 AM MDT | Red Flag Warning | BYZ | 33 hr |
| Oct 6, 3:26 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Oct 13, 2:57 PM MDT | High Wind Warning | BYZ | 27 hr |
| Oct 16, 2:32 PM MDT | Winter Weather Advisory | BYZ | 4 days |
| Oct 20, 3:33 AM MDT | Winter Storm Watch | BYZ | 25 hr |
| Oct 21, 4:34 AM MDT | Winter Weather Advisory | BYZ | 40 hr |
| Oct 22, 2:31 PM MDT | Winter Storm Watch | BYZ | 24 hr |
| Oct 23, 3:58 AM MDT | Winter Storm Warning | BYZ | 50 hr |
| Nov 5, 1:28 PM MST | Winter Storm Watch | BYZ | 38 hr |
| Nov 7, 3:51 AM MST | Winter Storm Warning | BYZ | 37 hr |
| Nov 8, 9:27 AM MST | Mesoscale Discussion | SPC | 5 hr |
| Nov 12, 12:34 AM MST | Special Weather Statement | BYZ | 3 hr |
| Nov 14, 1:08 PM MST | Special Weather Statement | BYZ | 112 min |
| Dec 21, 11:00 AM MST | High Wind Watch | BYZ | 15 hr |
| Dec 21, 7:49 PM MST | Dense Fog Advisory | BYZ | 6 hr |
| Dec 22, 2:18 AM MST | High Wind Warning | BYZ | 24 hr |
| Dec 28, 5:44 AM MST | Dense Fog Advisory | BYZ | 6 hr |
| Dec 28, 5:38 PM MST | Special Weather Statement | BYZ | 3 hr |
| Dec 28, 8:30 PM MST | Special Weather Statement | BYZ | 2 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 | 3 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 18 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 6 |
| Heat | |
| Heat Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 3 |
| Fire | |
| Red Flag Warning | 10 |
| Fire Weather Watch | 5 |
| 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 archive20192021
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.