Alert archive / Montana / Yellowstone County
Weather alerts in Yellowstone County, Montana, 2021
114 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Yellowstone County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 114
- Warnings
- 30
- Watches
- 19
- Advisories
- 13
- Busiest month
- July27 alerts
- Busiest day
- July 6, 20216 alerts
Over time
By month
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 9, 6:15 AM MST | Special Weather Statement | BYZ | 2 hr |
| Jan 9, 8:16 AM MST | Special Weather Statement | BYZ | 89 min |
| Jan 9, 9:47 AM MST | Special Weather Statement | BYZ | 58 min |
| Jan 9, 8:09 PM MST | Special Weather Statement | BYZ | 3 hr |
| Jan 9, 11:01 PM MST | Special Weather Statement | BYZ | 119 min |
| Jan 11, 3:04 AM MST | High Wind Watch | BYZ | 34 hr |
| Jan 12, 2:51 AM MST | High Wind Warning | BYZ | 65 hr |
| Jan 27, 5:46 AM MST | Special Weather Statement | BYZ | 4 hr |
| Feb 3, 6:35 AM MST | Special Weather Statement | BYZ | 85 min |
| Feb 3, 2:50 PM MST | Winter Storm Watch | BYZ | 37 hr |
| Feb 4, 9:28 AM MST | Winter Storm Warning | BYZ | 3 days |
| Feb 6, 3:26 AM MST | Wind Chill Advisory | BYZ | 10 days |
| Feb 7, 3:48 AM MST | Winter Weather Advisory | BYZ | 24 hr |
| Feb 18, 6:30 AM MST | Special Weather Statement | BYZ | 75 min |
| Feb 18, 6:32 AM MST | Special Weather Statement | BYZ | 73 min |
| Feb 20, 3:00 AM MST | High Wind Warning | BYZ | 4 days |
| Feb 27, 1:10 PM MST | Special Weather Statement | BYZ | 35 min |
| Feb 28, 12:29 AM MST | Special Weather Statement | BYZ | 76 min |
| Mar 27, 3:15 AM MDT | High Wind Watch | BYZ | 23 hr |
| Mar 28, 2:27 AM MDT | High Wind Warning | BYZ | 40 hr |
| Mar 29, 5:52 AM MDT | Special Weather Statement | BYZ | 113 min |
| Apr 17, 3:31 PM MDT | Winter Weather Advisory | BYZ | 42 hr |
| Apr 22, 2:19 AM MDT | Winter Weather Advisory | BYZ | 32 hr |
| May 1, 9:01 PM MDT | Special Weather Statement | BYZ | 59 min |
| May 28, 3:55 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 4:11 PM MDT | Special Weather Statement | BYZ | 34 min |
| Jun 4, 8:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 2:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 4:14 PM MDT | Special Weather Statement | BYZ | 31 min |
| Jun 5, 4:44 PM MDT | Severe Thunderstorm Warning | BYZ | 31 min |
| Jun 9, 3:19 AM MDT | High Wind Watch | BYZ | 24 hr |
| Jun 9, 3:57 AM MDT | Fire Weather Watch | BYZ | 10 hr |
| Jun 9, 1:38 PM MDT | Red Flag Warning | BYZ | 32 hr |
| Jun 10, 3:47 PM MDT | Severe Thunderstorm Warning | BYZ | 43 min |
| Jun 10, 4:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 5:19 PM MDT | Special Weather Statement | BYZ | 11 min |
| Jun 10, 5:30 PM MDT | Special Weather Statement | BYZ | 30 min |
| Jun 10, 5:57 PM MDT | Special Weather Statement | BYZ | 48 min |
| Jun 10, 7:02 PM MDT | Special Weather Statement | BYZ | 43 min |
| Jun 13, 2:34 PM MDT | Excessive Heat Warning | BYZ | 54 hr |
| Jun 14, 9:26 AM MDT | Red Flag Warning | BYZ | 43 hr |
| Jun 14, 2:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 2:46 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Jun 18, 2:00 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Jun 23, 4:31 PM MDT | Special Weather Statement | BYZ | 44 min |
| Jun 23, 4:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 29, 1:38 AM MDT | Excessive Heat Watch | BYZ | 36 hr |
| Jun 30, 1:34 PM MDT | Heat Advisory | BYZ | 4 days |
| Jul 3, 7:30 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 6, 2:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jul 6, 4:43 PM MDT | Severe Thunderstorm Warning | BYZ | 32 min |
| Jul 6, 5:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 6, 5:12 PM MDT | Severe Thunderstorm Warning | BYZ | 48 min |
| Jul 6, 5:27 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jul 6, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | 50 min |
| Jul 6, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 6, 6:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 7, 2:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 7, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 5:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 7, 6:35 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jul 7, 7:24 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jul 9, 2:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 9, 3:36 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jul 13, 2:21 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 14, 12:51 PM MDT | Excessive Heat Watch | BYZ | 46 hr |
| Jul 16, 11:06 AM MDT | Excessive Heat Warning | BYZ | 6 days |
| Jul 16, 4:28 PM MDT | Special Weather Statement | BYZ | 47 min |
| Jul 16, 4:49 PM MDT | Severe Thunderstorm Warning | BYZ | 41 min |
| Jul 16, 6:22 PM MDT | Special Weather Statement | BYZ | 38 min |
| Jul 18, 2:06 AM MDT | Fire Weather Watch | BYZ | 13 hr |
| Jul 18, 3:10 PM MDT | Red Flag Warning | BYZ | 57 hr |
| Jul 21, 5:11 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jul 24, 12:18 PM MDT | Excessive Heat Watch | BYZ | 25 hr |
| Jul 25, 1:39 PM MDT | Excessive Heat Warning | BYZ | 58 hr |
| Aug 3, 3:14 PM MDT | Special Weather Statement | BYZ | 46 min |
| Aug 7, 3:06 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Aug 7, 2:26 PM MDT | Red Flag Warning | BYZ | 34 hr |
| Aug 9, 2:58 AM MDT | Fire Weather Watch | BYZ | 10 hr |
| Aug 9, 12:55 PM MDT | Red Flag Warning | BYZ | 57 hr |
| Aug 14, 3:08 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Aug 14, 2:07 PM MDT | Red Flag Warning | BYZ | 3 days |
| Aug 15, 1:30 PM MDT | Heat Advisory | BYZ | 55 hr |
| Aug 16, 2:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Aug 16, 4:34 PM MDT | Special Weather Statement | BYZ | 41 min |
| Aug 16, 4:56 PM MDT | Severe Thunderstorm Warning | BYZ | 50 min |
| Aug 16, 5:45 PM MDT | Special Weather Statement | BYZ | 45 min |
| Aug 17, 2:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 26, 2:06 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 27, 2:48 PM MDT | Special Weather Statement | BYZ | 42 min |
| Sep 4, 2:20 PM MDT | Fire Weather Watch | BYZ | 24 hr |
| Sep 5, 2:29 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Sep 14, 1:04 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Sep 16, 1:53 PM MDT | Red Flag Warning | BYZ | 55 hr |
| Sep 27, 1:50 AM MDT | Fire Weather Watch | BYZ | 12 hr |
| Sep 27, 2:06 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Oct 9, 1:08 PM MDT | Winter Storm Watch | BYZ | 38 hr |
| Oct 11, 3:34 AM MDT | Winter Weather Advisory | BYZ | 47 hr |
| Oct 25, 1:31 PM MDT | High Wind Watch | BYZ | 36 hr |
| Nov 15, 2:44 AM MST | High Wind Warning | BYZ | 39 hr |
| Nov 24, 3:56 AM MST | Special Weather Statement | BYZ | 4 hr |
| Nov 24, 9:36 PM MST | Special Weather Statement | BYZ | 84 min |
| Nov 25, 1:06 AM MST | Special Weather Statement | BYZ | 114 min |
| Dec 6, 1:18 AM MST | Winter Weather Advisory | BYZ | 32 hr |
| Dec 13, 2:37 PM MST | Winter Weather Advisory | BYZ | 50 hr |
| Dec 18, 2:41 PM MST | Winter Weather Advisory | BYZ | 44 hr |
| Dec 20, 11:36 PM MST | Special Weather Statement | BYZ | 54 min |
| Dec 24, 12:49 PM MST | Special Weather Statement | BYZ | 56 min |
| Dec 26, 4:06 AM MST | Winter Weather Advisory | BYZ | 17 hr |
| Dec 26, 4:59 AM MST | Special Weather Statement | BYZ | 3 hr |
| Dec 26, 8:00 AM MST | Special Weather Statement | BYZ | 90 min |
| Dec 26, 6:39 PM MST | Wind Chill Advisory | BYZ | 41 hr |
| Dec 27, 12:21 PM MST | Special Weather Statement | BYZ | 69 min |
| Dec 30, 12:30 PM MST | Winter Weather Advisory | BYZ | 27 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 | 11 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 37 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Excessive Heat Warning | 3 |
| Excessive Heat Watch | 3 |
| Heat Advisory | 2 |
| Cold | |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 4 |
| Fire | |
| Red Flag Warning | 11 |
| Fire Weather Watch | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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. Rebuilt daily.