Alert archive / Montana / Silver Bow County
Weather alerts in Silver Bow County, Montana, 2010
107 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 107
- Warnings
- 18
- Watches
- 17
- Advisories
- 34
- Busiest month
- August20 alerts
- Busiest day
- July 1, 20108 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, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 0 | ||
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: tornado warnings | 0 | 1 | 0% | |||
| NWS Missoula, MT: severe thunderstorm warnings | 53 | 23 | 57% | 67 | 55% | 19 min |
| NWS Missoula, MT: flash flood warnings | 7 | 0 | 100% | 2 | 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 |
|---|---|---|---|
| Dec 31, 8:55 PM MST | Winter Weather Advisory | MSO | 13 hr |
| Jan 4, 1:49 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Jan 6, 8:54 AM MST | Wind Chill Advisory | MSO | 3 hr |
| Jan 14, 2:21 PM MST | Wind Advisory | MSO | 30 hr |
| Jan 22, 3:47 AM MST | Winter Storm Watch | MSO | 11 hr |
| Jan 22, 3:47 AM MST | Winter Weather Advisory | MSO | 43 hr |
| Jan 22, 7:46 AM MST | Winter Storm Warning | MSO | 37 hr |
| Jan 24, 4:21 AM MST | Winter Weather Advisory | MSO | 5 hr |
| Feb 8, 8:42 AM MST | Freezing Fog Advisory | MSO | 3 hr |
| Feb 8, 6:46 PM MST | Dense Fog Advisory | MSO | 15 hr |
| Mar 9, 5:24 PM MST | Winter Weather Advisory | MSO | 10 hr |
| Mar 12, 4:14 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Mar 29, 3:32 AM MDT | Wind Advisory | MSO | 14 hr |
| Apr 1, 3:03 PM MDT | Wind Advisory | MSO | 31 hr |
| Apr 5, 2:33 PM MDT | Winter Weather Advisory | MSO | 19 hr |
| Apr 7, 2:22 PM MDT | High Wind Warning | MSO | 31 hr |
| Apr 12, 2:50 PM MDT | Winter Storm Warning | MSO | 43 hr |
| Apr 27, 9:08 PM MDT | Special Weather Statement | MSO | 47 min |
| Apr 28, 2:59 PM MDT | Winter Weather Advisory | MSO | 39 hr |
| May 2, 11:13 AM MDT | High Wind Warning | MSO | 41 hr |
| May 4, 2:43 PM MDT | Winter Storm Watch | MSO | 14 hr |
| May 5, 4:21 AM MDT | Winter Storm Warning | MSO | 28 hr |
| May 17, 4:11 PM MDT | Special Weather Statement | MSO | 64 min |
| May 17, 5:23 PM MDT | Special Weather Statement | MSO | 97 min |
| May 21, 2:24 PM MDT | Winter Weather Advisory | MSO | 40 hr |
| May 22, 9:00 PM MDT | Winter Storm Warning | MSO | 9 hr |
| May 23, 4:07 AM MDT | Winter Storm Watch | MSO | 10 hr |
| May 23, 2:13 PM MDT | Winter Storm Warning | MSO | 26 hr |
| Jun 15, 12:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 1:45 PM MDT | Special Weather Statement | MSO | 45 min |
| Jun 20, 1:40 PM MDT | Flash Flood Watch | MSO | 5 hr |
| Jun 20, 2:08 PM MDT | Special Weather Statement | MSO | 52 min |
| Jun 20, 2:31 PM MDT | Flash Flood Warning | MSO | 60 min |
| Jun 25, 9:39 AM MDT | Flash Flood Watch | MSO | 11 hr |
| Jun 29, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 29, 5:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 30, 1:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 30, 1:58 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 12:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 1, 1:23 PM MDT | Special Weather Statement | MSO | 52 min |
| Jul 1, 1:37 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 2:15 PM MDT | Special Weather Statement | MSO | 45 min |
| Jul 1, 3:16 PM MDT | Severe Thunderstorm Warning | MSO | 15 min |
| Jul 1, 3:38 PM MDT | Severe Thunderstorm Warning | MSO | 22 min |
| Jul 1, 4:22 PM MDT | Special Weather Statement | MSO | 23 min |
| Jul 1, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 1, 6:08 PM MDT | Special Weather Statement | MSO | 22 min |
| Jul 2, 1:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 10, 4:19 PM MDT | Special Weather Statement | MSO | 41 min |
| Jul 11, 2:56 PM MDT | Wind Advisory | MSO | 30 hr |
| Jul 31, 12:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 31, 1:19 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 31, 2:05 PM MDT | Special Weather Statement | MSO | 40 min |
| Jul 31, 5:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 4, 3:03 PM MDT | Flood Watch | MSO | 5 hr |
| Aug 4, 4:28 PM MDT | Special Weather Statement | MSO | 47 min |
| Aug 4, 4:43 PM MDT | Areal Flood Advisory | MSO | 109 min |
| Aug 5, 4:39 PM MDT | Special Weather Statement | TFX | 51 min |
| Aug 5, 5:29 PM MDT | Severe Thunderstorm Warning | MSO | 46 min |
| Aug 6, 2:09 PM MDT | Flash Flood Watch | MSO | 8 hr |
| Aug 6, 2:30 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Aug 6, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 6, 4:36 PM MDT | Special Weather Statement | MSO | 39 min |
| Aug 6, 6:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Aug 7, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 1:32 PM MDT | Flash Flood Watch | MSO | 8 hr |
| Aug 10, 1:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 3:40 PM MDT | Special Weather Statement | TFX | 65 min |
| Aug 11, 4:01 PM MDT | Special Weather Statement | MSO | 44 min |
| Aug 18, 5:22 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 20, 12:00 PM MDT | Red Flag Warning | MSO | 33 hr |
| Aug 24, 1:57 PM MDT | Fire Weather Watch | MSO | 24 hr |
| Aug 25, 2:14 PM MDT | Red Flag Warning | MSO | 34 hr |
| Aug 26, 11:22 AM MDT | Wind Advisory | MSO | 12 hr |
| Sep 4, 1:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Sep 4, 4:15 PM MDT | Special Weather Statement | MSO | 45 min |
| Sep 4, 5:02 PM MDT | Special Weather Statement | MSO | 58 min |
| Sep 4, 6:10 PM MDT | Special Weather Statement | MSO | 50 min |
| Sep 8, 8:43 PM MDT | Areal Flood Advisory | MSO | 2 hr |
| Sep 13, 4:07 PM MDT | Special Weather Statement | MSO | 38 min |
| Sep 13, 4:45 PM MDT | Special Weather Statement | MSO | 45 min |
| Sep 13, 5:36 PM MDT | Special Weather Statement | MSO | 39 min |
| Sep 14, 3:11 PM MDT | Special Weather Statement | MSO | 49 min |
| Sep 14, 3:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Oct 30, 7:44 AM MDT | Dense Fog Advisory | MSO | 3 hr |
| Nov 7, 2:17 PM MST | Winter Weather Advisory | MSO | 27 hr |
| Nov 14, 2:24 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Nov 15, 11:38 AM MST | High Wind Warning | MSO | 20 hr |
| Nov 17, 2:55 PM MST | Winter Weather Advisory | MSO | 28 hr |
| Nov 19, 3:06 AM MST | Wind Chill Advisory | MSO | 56 hr |
| Nov 19, 3:06 AM MST | Winter Weather Advisory | MSO | 44 hr |
| Nov 20, 12:13 PM MST | Winter Weather Advisory | MSO | 8 hr |
| Nov 21, 3:05 AM MST | Winter Storm Warning | MSO | 58 hr |
| Nov 22, 2:27 PM MST | Blizzard Warning | MSO | 23 hr |
| Nov 23, 1:16 PM MST | Wind Chill Warning | MSO | 9 hr |
| Nov 24, 10:07 AM MST | Wind Chill Warning | MSO | 10 hr |
| Dec 1, 2:47 PM MST | Winter Weather Advisory | MSO | 38 hr |
| Dec 8, 3:30 AM MST | Winter Storm Watch | MSO | 35 hr |
| Dec 8, 7:44 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 9, 2:46 PM MST | Wind Advisory | MSO | 17 hr |
| Dec 10, 2:54 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 14, 4:37 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Dec 14, 9:48 AM MST | High Wind Watch | MSO | 5 hr |
| Dec 19, 3:52 AM MST | Winter Weather Advisory | MSO | 33 hr |
| Dec 27, 3:49 AM MST | Winter Storm Watch | MSO | 31 hr |
| Dec 28, 10:43 AM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 30, 3:49 AM MST | Wind Chill Advisory | MSO | 11 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 archive20092011
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.