Alert archive / Montana / Silver Bow County
Weather alerts in Silver Bow County, Montana, 2012
103 weather alerts in 2012, 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 2012. Tap one for its archive.
- Alerts
- 103
- Warnings
- 30
- Watches
- 25
- Advisories
- 35
- Busiest month
- August22 alerts
- Busiest day
- June 4, 20123 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, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 57 | 25 | 56% | 71 | 49% | 20 min |
| NWS Missoula, MT: flash flood warnings | 6 | 0 | 100% | 6 | 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 5, 8:18 AM MST | Wind Advisory | MSO | 8 hr |
| Jan 10, 12:54 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Jan 13, 2:56 PM MST | Winter Weather Advisory | MSO | 62 hr |
| Jan 14, 3:10 AM MST | Wind Advisory | MSO | 18 hr |
| Jan 15, 2:46 PM MST | Winter Storm Watch | MSO | 48 hr |
| Jan 17, 2:53 PM MST | Winter Weather Advisory | MSO | 66 hr |
| Jan 24, 2:03 PM MST | Wind Advisory | MSO | 27 hr |
| Jan 29, 10:27 AM MST | Wind Advisory | MSO | 10 hr |
| Feb 10, 4:39 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Feb 17, 3:36 AM MST | Winter Weather Advisory | MSO | 55 hr |
| Feb 19, 3:03 PM MST | High Wind Watch | MSO | 54 hr |
| Feb 21, 10:28 AM MST | High Wind Warning | MSO | 31 hr |
| Feb 22, 4:53 PM MST | Winter Weather Advisory | MSO | 16 hr |
| Feb 24, 2:18 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Feb 28, 11:44 AM MST | Winter Weather Advisory | MSO | 59 hr |
| Mar 5, 1:30 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 12, 12:04 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Mar 12, 12:22 PM MDT | Wind Advisory | MSO | 30 hr |
| Mar 16, 3:02 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Mar 16, 10:33 PM MDT | Winter Storm Warning | MSO | 61 hr |
| Mar 20, 8:41 AM MDT | Wind Advisory | MSO | 11 hr |
| Mar 20, 12:29 PM MDT | High Wind Warning | MSO | 8 hr |
| Mar 23, 1:49 PM MDT | Winter Weather Advisory | MSO | 7 hr |
| Apr 3, 12:15 PM MDT | Wind Advisory | MSO | 22 hr |
| Apr 4, 9:22 AM MDT | Wind Advisory | MSO | 11 hr |
| Apr 4, 2:30 PM MDT | Winter Storm Watch | MSO | 14 hr |
| Apr 5, 4:07 AM MDT | Winter Storm Warning | MSO | 46 hr |
| Apr 23, 1:21 PM MDT | Special Weather Statement | MSO | 24 min |
| Apr 26, 8:12 AM MDT | Wind Advisory | MSO | 10 hr |
| May 2, 1:51 AM MDT | Winter Weather Advisory | MSO | 8 hr |
| May 4, 3:48 AM MDT | Winter Weather Advisory | MSO | 30 hr |
| May 10, 11:03 AM MDT | Freeze Warning | MSO | 22 hr |
| May 21, 2:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| May 24, 10:48 AM MDT | Wind Advisory | MSO | 30 hr |
| May 24, 1:26 PM MDT | Winter Weather Advisory | MSO | 3 days |
| Jun 4, 9:09 AM MDT | Flood Watch | MSO | 61 hr |
| Jun 4, 1:46 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 4, 4:45 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jun 5, 5:53 PM MDT | Special Weather Statement | TFX | 52 min |
| Jun 6, 6:29 AM MDT | Flood Watch | MSO | 3 hr |
| Jun 16, 12:42 PM MDT | Wind Advisory | MSO | 32 hr |
| Jun 23, 2:55 PM MDT | Red Flag Warning | MSO | 30 hr |
| Jun 24, 8:58 PM MDT | Red Flag Warning | MSO | 24 hr |
| Jun 26, 2:35 AM MDT | Red Flag Warning | MSO | 21 hr |
| Jun 29, 5:02 AM MDT | Fire Weather Watch | MSO | 48 hr |
| Jul 1, 4:45 AM MDT | Red Flag Warning | MSO | 14 hr |
| Jul 1, 4:34 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 1, 5:04 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 3:06 AM MDT | Fire Weather Watch | MSO | 11 hr |
| Jul 2, 2:24 PM MDT | Red Flag Warning | MSO | 32 hr |
| Jul 9, 3:33 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Jul 10, 3:05 AM MDT | Red Flag Warning | MSO | 18 hr |
| Jul 10, 5:27 PM MDT | Special Weather Statement | MSO | 33 min |
| Jul 16, 2:42 PM MDT | Flash Flood Warning | MSO | 93 min |
| Jul 16, 3:04 PM MDT | Flash Flood Watch | MSO | 5 hr |
| Jul 20, 2:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 3:30 PM MDT | Special Weather Statement | TFX | 60 min |
| Jul 22, 3:39 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Jul 26, 2:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 27, 3:53 PM MDT | Severe Thunderstorm Warning | MSO | 67 min |
| Jul 27, 4:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 28, 2:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 1, 3:36 AM MDT | Fire Weather Watch | MSO | 7 hr |
| Aug 1, 10:33 AM MDT | Red Flag Warning | MSO | 34 hr |
| Aug 5, 2:44 PM MDT | Fire Weather Watch | MSO | 14 hr |
| Aug 5, 2:44 PM MDT | Red Flag Warning | MSO | 29 hr |
| Aug 7, 2:00 PM MDT | Red Flag Warning | MSO | 31 hr |
| Aug 9, 3:34 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Aug 10, 3:38 AM MDT | Red Flag Warning | MSO | 15 hr |
| Aug 12, 7:22 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Aug 13, 2:16 PM MDT | Red Flag Warning | MSO | 31 hr |
| Aug 17, 2:13 PM MDT | Fire Weather Watch | MSO | 37 hr |
| Aug 19, 3:39 AM MDT | Red Flag Warning | MSO | 17 hr |
| Aug 21, 10:51 AM MDT | Red Flag Warning | MSO | 13 hr |
| Aug 21, 2:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 3:08 PM MDT | Special Weather Statement | MSO | 37 min |
| Aug 22, 7:20 AM MDT | Fire Weather Watch | MSO | 7 hr |
| Aug 22, 2:11 PM MDT | Fire Weather Watch | MSO | 22 hr |
| Aug 22, 2:11 PM MDT | Red Flag Warning | MSO | 31 hr |
| Aug 23, 9:35 PM MDT | Red Flag Warning | MSO | 24 hr |
| Aug 27, 3:08 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Aug 28, 3:26 AM MDT | Red Flag Warning | MSO | 66 hr |
| Aug 30, 2:13 PM MDT | Red Flag Warning | MSO | 8 hr |
| Aug 31, 2:20 PM MDT | Fire Weather Watch | MSO | 13 hr |
| Sep 8, 8:34 AM MDT | Red Flag Warning | MSO | 63 hr |
| Sep 13, 3:31 AM MDT | Fire Weather Watch | MSO | 11 hr |
| Sep 13, 2:07 PM MDT | Red Flag Warning | MSO | 31 hr |
| Oct 1, 12:48 PM MDT | Fire Weather Watch | MSO | 16 hr |
| Oct 2, 4:42 AM MDT | Red Flag Warning | MSO | 16 hr |
| Oct 15, 4:39 AM MDT | High Wind Warning | MSO | 40 hr |
| Oct 19, 10:55 AM MDT | Wind Advisory | MSO | 29 hr |
| Oct 25, 6:51 PM MDT | Winter Weather Advisory | MSO | 9 hr |
| Nov 6, 4:21 AM MST | Winter Storm Watch | MSO | 49 hr |
| Nov 7, 4:16 AM MST | Winter Storm Warning | MSO | 65 hr |
| Nov 20, 2:06 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Nov 29, 1:58 AM MST | Winter Weather Advisory | MSO | 7 hr |
| Nov 30, 1:10 PM MST | Winter Storm Watch | MSO | 23 hr |
| Dec 1, 12:07 PM MST | Winter Weather Advisory | MSO | 31 hr |
| Dec 6, 10:22 AM MST | Winter Weather Advisory | MSO | 52 hr |
| Dec 7, 7:23 PM MST | Winter Storm Warning | MSO | 13 hr |
| Dec 9, 2:16 PM MST | Winter Weather Advisory | MSO | 19 hr |
| Dec 15, 2:57 PM MST | Winter Weather Advisory | MSO | 60 hr |
| Dec 23, 2:08 PM MST | Winter Weather Advisory | MSO | 33 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 | 2 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 5 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 23 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 1 |
| Wind Advisory | 12 |
| Fire | |
| Red Flag Warning | 20 |
| Fire Weather Watch | 15 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.