Alert archive / Montana / Silver Bow County
Weather alerts in Silver Bow County, Montana, 2022
114 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Silver Bow County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 114
- Warnings
- 27
- Watches
- 16
- Advisories
- 41
- Busiest month
- July23 alerts
- Busiest day
- December 1, 20224 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Silver Bow County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 0 | ||
| 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 Missoula, MT: severe thunderstorm warnings | 76 | 39 | 49% | 90 | 74% | 16 min |
| NWS Missoula, MT: flash flood warnings | 0 | 3 | 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 2, 11:07 AM MST | Winter Weather Advisory | MSO | 48 hr |
| Jan 3, 10:15 PM MST | Special Weather Statement | MSO | 60 min |
| Jan 4, 12:08 AM MST | Special Weather Statement | MSO | 52 min |
| Jan 4, 12:34 PM MST | Winter Weather Advisory | MSO | 4 days |
| Jan 5, 4:09 AM MST | Winter Weather Advisory | MSO | 19 hr |
| Jan 5, 6:42 AM MST | Winter Storm Warning | MSO | 4 hr |
| Jan 5, 2:14 PM MST | Winter Storm Warning | MSO | 65 hr |
| Jan 17, 2:52 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Jan 24, 11:12 AM MST | Winter Weather Advisory | MSO | 9 hr |
| Jan 30, 3:31 AM MST | Winter Weather Advisory | MSO | 71 hr |
| Feb 1, 6:05 AM MST | Winter Weather Advisory | MSO | 21 hr |
| Feb 1, 10:21 AM MST | Wind Chill Advisory | MSO | 26 hr |
| Feb 1, 9:04 PM MST | Winter Storm Warning | MSO | 6 hr |
| Feb 14, 2:50 AM MST | Winter Weather Advisory | MSO | 32 hr |
| Feb 15, 12:19 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Feb 18, 12:54 PM MST | Winter Storm Watch | MSO | 41 hr |
| Feb 19, 6:29 AM MST | Winter Storm Warning | MSO | 52 hr |
| Feb 21, 5:11 AM MST | Wind Chill Warning | MSO | 30 hr |
| Feb 21, 5:11 AM MST | Wind Chill Advisory | MSO | 51 hr |
| Mar 4, 2:41 PM MST | Winter Weather Advisory | MSO | 18 hr |
| Mar 6, 2:10 PM MST | Winter Storm Watch | MSO | 21 hr |
| Mar 7, 11:25 AM MST | Winter Weather Advisory | MSO | 37 hr |
| Mar 8, 10:02 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Mar 8, 1:16 PM MST | Wind Chill Advisory | MSO | 22 hr |
| Apr 3, 1:18 AM MDT | High Wind Watch | MSO | 26 hr |
| Apr 3, 3:07 PM MDT | Winter Weather Advisory | MSO | 57 hr |
| Apr 4, 3:01 AM MDT | High Wind Warning | MSO | 25 hr |
| Apr 5, 3:43 AM MDT | Wind Advisory | MSO | 17 hr |
| Apr 9, 2:28 PM MDT | Winter Storm Watch | MSO | 35 hr |
| Apr 10, 2:44 PM MDT | Winter Storm Warning | MSO | 45 hr |
| Apr 15, 1:57 PM MDT | Winter Weather Advisory | MSO | 43 hr |
| Apr 27, 1:53 PM MDT | Winter Storm Watch | MSO | 13 hr |
| Apr 28, 2:50 AM MDT | Winter Storm Warning | MSO | 24 hr |
| Apr 28, 2:50 AM MDT | Winter Weather Advisory | MSO | 30 hr |
| May 8, 5:18 PM MDT | Special Weather Statement | MSO | 27 min |
| May 12, 1:44 PM MDT | Wind Advisory | MSO | 30 hr |
| May 16, 7:00 PM MDT | Special Weather Statement | TFX | 30 min |
| May 16, 7:21 PM MDT | Special Weather Statement | MSO | 39 min |
| May 18, 12:46 PM MDT | High Wind Warning | MSO | 17 hr |
| May 18, 12:46 PM MDT | Wind Advisory | MSO | 26 hr |
| May 18, 12:46 PM MDT | Wind Advisory | MSO | 26 hr |
| May 19, 10:31 AM MDT | Winter Weather Advisory | MSO | 22 hr |
| Jun 13, 6:40 PM MDT | Wind Advisory | MSO | 26 hr |
| Jun 16, 2:06 PM MDT | Wind Advisory | MSO | 29 hr |
| Jun 18, 3:47 AM MDT | Wind Advisory | MSO | 17 hr |
| Jun 28, 2:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 28, 2:46 PM MDT | Special Weather Statement | MSO | 14 min |
| Jul 3, 12:09 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 3, 5:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 6, 1:42 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 6, 2:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 4:51 PM MDT | Special Weather Statement | MSO | 9 min |
| Jul 7, 1:08 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 7, 4:10 PM MDT | Special Weather Statement | MSO | 35 min |
| Jul 8, 2:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 8, 3:09 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 6:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 2:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 9, 2:59 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 2:02 PM MDT | Special Weather Statement | MSO | 28 min |
| Jul 13, 4:51 PM MDT | Special Weather Statement | MSO | 24 min |
| Jul 14, 5:32 PM MDT | Special Weather Statement | MSO | 43 min |
| Jul 15, 4:30 PM MDT | Severe Thunderstorm Warning | MSO | 15 min |
| Jul 16, 1:27 PM MDT | High Wind Watch | MSO | 24 hr |
| Jul 17, 1:29 PM MDT | High Wind Warning | MSO | 31 hr |
| Jul 18, 11:29 AM MDT | Red Flag Warning | MSO | 10 hr |
| Jul 20, 2:58 PM MDT | Fire Weather Watch | MSO | 25 hr |
| Jul 21, 3:29 PM MDT | Red Flag Warning | MSO | 30 hr |
| Jul 24, 3:02 PM MDT | Special Weather Statement | MSO | 13 min |
| Jul 30, 1:05 PM MDT | Red Flag Warning | MSO | 32 hr |
| Aug 3, 1:13 PM MDT | Red Flag Warning | MSO | 32 hr |
| Aug 12, 4:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Aug 24, 1:32 AM MDT | Flood Watch | MSO | 43 hr |
| Aug 24, 2:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 5:41 PM MDT | Special Weather Statement | TFX | 49 min |
| Aug 24, 7:02 PM MDT | Special Weather Statement | TFX | 43 min |
| Aug 25, 2:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 1:50 PM MDT | Fire Weather Watch | MSO | 23 hr |
| Sep 2, 1:14 PM MDT | Red Flag Warning | MSO | 52 hr |
| Sep 5, 1:53 PM MDT | Fire Weather Watch | MSO | 13 hr |
| Sep 6, 3:08 AM MDT | Red Flag Warning | MSO | 42 hr |
| Sep 7, 4:48 PM MDT | Special Weather Statement | MSO | 27 min |
| Sep 29, 12:35 PM MDT | Special Weather Statement | MSO | 25 min |
| Oct 20, 3:14 PM MDT | Winter Storm Watch | MSO | 23 hr |
| Oct 21, 2:30 PM MDT | Winter Storm Warning | MSO | 58 hr |
| Oct 23, 2:44 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Nov 3, 12:07 PM MDT | High Wind Watch | MSO | 20 hr |
| Nov 4, 8:31 AM MDT | High Wind Warning | MSO | 30 hr |
| Nov 5, 2:41 PM MDT | Winter Weather Advisory | MSO | 18 hr |
| Nov 6, 3:06 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Nov 7, 11:45 AM MST | Special Weather Statement | MSO | 30 min |
| Nov 8, 1:15 PM MST | Winter Storm Warning | MSO | 29 hr |
| Nov 8, 1:15 PM MST | Winter Weather Advisory | MSO | 40 hr |
| Nov 15, 12:31 PM MST | Winter Weather Advisory | MSO | 47 hr |
| Nov 22, 2:35 AM MST | Winter Weather Advisory | MSO | 32 hr |
| Nov 26, 12:36 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Nov 27, 4:00 PM MST | Snow Squall Warning | MSO | 60 min |
| Nov 27, 4:32 PM MST | Snow Squall Warning | MSO | 58 min |
| Nov 27, 5:26 PM MST | Snow Squall Warning | MSO | 49 min |
| Nov 28, 10:44 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Nov 29, 2:15 PM MST | Winter Weather Advisory | MSO | 64 hr |
| Dec 1, 3:55 PM MST | Special Weather Statement | MSO | 50 min |
| Dec 1, 4:12 PM MST | Snow Squall Warning | MSO | 48 min |
| Dec 1, 4:42 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Dec 1, 4:56 PM MST | Snow Squall Warning | MSO | 19 min |
| Dec 3, 2:36 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 10, 1:24 PM MST | Winter Weather Advisory | MSO | 49 hr |
| Dec 13, 2:48 PM MST | Winter Weather Advisory | MSO | 36 hr |
| Dec 18, 11:18 AM MST | Winter Storm Watch | MSO | 45 hr |
| Dec 19, 12:52 PM MST | Winter Storm Warning | MSO | 46 hr |
| Dec 21, 8:44 AM MST | Wind Chill Warning | MSO | 27 hr |
| Dec 22, 2:44 PM MST | Winter Weather Advisory | MSO | 3 days |
| Dec 22, 6:19 PM MST | Wind Chill Advisory | MSO | 17 hr |
| Dec 26, 8:08 AM MST | Winter Weather Advisory | MSO | 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 | 1 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 18 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Snow Squall Warning | 5 |
| Winter Storm Warning | 9 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 30 |
| Cold | |
| Wind Chill Warning | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 3 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 3 |
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.