Alert archive / Montana / Granite County
Weather alerts in Granite County, Montana, 2012
146 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Granite County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 146
- Warnings
- 42
- Watches
- 25
- Advisories
- 65
- Busiest month
- August22 alerts
- Busiest day
- June 4, 201210 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Granite County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 2 | 75% | 1 | 100% | 19 min |
| 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 8, 2:39 AM MST | Winter Weather Advisory | MSO | 9 hr |
| Jan 9, 10:34 AM MST | Winter Weather Advisory | MSO | 25 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 16, 3:30 PM MST | Winter Storm Warning | MSO | 4 days |
| Jan 17, 2:53 PM MST | Winter Weather Advisory | MSO | 66 hr |
| Jan 20, 2:23 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Jan 22, 2:19 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Jan 24, 4:15 AM MST | Winter Weather Advisory | MSO | 66 hr |
| Jan 24, 2:03 PM MST | Wind Advisory | MSO | 27 hr |
| Jan 28, 2:18 PM MST | Winter Weather Advisory | MSO | 51 hr |
| Jan 29, 3:37 AM MST | Freezing Rain Advisory | MSO | 5 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 12, 4:39 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Feb 13, 3:51 AM MST | Dense Fog Advisory | MSO | 7 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 19, 3:06 PM MST | Winter Storm Watch | MSO | 47 hr |
| Feb 21, 3:46 AM MST | Winter Storm Warning | MSO | 48 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 23, 2:11 PM MST | Winter Storm Watch | MSO | 24 hr |
| Feb 24, 2:18 PM MST | Winter Storm Warning | MSO | 37 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 2, 11:20 AM MST | Winter Weather Advisory | MSO | 26 hr |
| Mar 2, 11:20 AM MST | Freezing Rain Advisory | MSO | 19 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 14, 2:29 PM MDT | Winter Weather Advisory | MSO | 49 hr |
| Mar 16, 3:02 PM MDT | Winter Storm Watch | MSO | 8 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 18, 12:59 PM MDT | Winter Weather Advisory | MSO | 23 hr |
| Mar 19, 2:54 PM MDT | Winter Weather Advisory | MSO | 66 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 20, 2:25 PM MDT | Winter Storm Warning | MSO | 43 hr |
| Mar 23, 1:49 PM MDT | Winter Weather Advisory | MSO | 7 hr |
| Mar 28, 2:00 PM MDT | Special Weather Statement | MSO | 60 min |
| Mar 31, 2:45 PM MDT | Winter Weather Advisory | MSO | 23 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 5, 4:07 AM MDT | Winter Weather Advisory | MSO | 46 hr |
| 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 24, 10:48 AM MDT | Wind Advisory | MSO | 30 hr |
| May 24, 1:26 PM MDT | Winter Weather Advisory | MSO | 3 days |
| Jun 4, 1:46 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 4, 3:03 PM MDT | Special Weather Statement | MSO | 42 min |
| Jun 4, 3:46 PM MDT | Severe Thunderstorm Warning | MSO | 44 min |
| Jun 4, 3:48 PM MDT | Severe Thunderstorm Warning | MSO | 27 min |
| Jun 4, 4:01 PM MDT | Severe Thunderstorm Warning | MSO | 29 min |
| Jun 4, 4:14 PM MDT | Severe Thunderstorm Warning | MSO | 31 min |
| Jun 4, 4:26 PM MDT | Severe Thunderstorm Warning | MSO | 49 min |
| Jun 4, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | 29 min |
| Jun 4, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | 44 min |
| Jun 4, 4:45 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jun 4, 7:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 16, 12:42 PM MDT | Wind Advisory | MSO | 32 hr |
| Jun 23, 2:43 PM MDT | Special Weather Statement | MSO | 47 min |
| Jun 23, 2:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 23, 2:55 PM MDT | Red Flag Warning | MSO | 30 hr |
| Jun 23, 2:56 PM MDT | Severe Thunderstorm Warning | MSO | 64 min |
| 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 26, 10:11 AM MDT | Special Weather Statement | MSO | 49 min |
| Jun 29, 5:02 AM MDT | Fire Weather Watch | MSO | 48 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 3, 3:53 AM MDT | Wind Advisory | MSO | 17 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 11, 5:37 PM MDT | Special Weather Statement | MSO | 23 min |
| Jul 15, 12:52 PM MDT | Areal Flood Advisory | MSO | 113 min |
| Jul 16, 3:04 PM MDT | Flash Flood Watch | MSO | 5 hr |
| Jul 16, 3:08 PM MDT | Flash Flood Warning | MSO | 112 min |
| Jul 17, 7:38 PM MDT | Special Weather Statement | MSO | 37 min |
| Jul 20, 2:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 22, 3:39 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Jul 22, 5:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jul 26, 2:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 27, 4:37 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 8, 6:39 PM MDT | Areal Flood Advisory | MSO | 2 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 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 1, 3:29 AM MDT | Red Flag Warning | MSO | 19 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 | Winter Weather Advisory | MSO | 50 hr |
| Oct 14, 7:28 PM MDT | Wind Advisory | MSO | 46 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 19, 11:20 AM MDT | Winter Weather Advisory | MSO | 32 hr |
| Oct 21, 2:36 PM MDT | Winter Storm Watch | MSO | 12 hr |
| Oct 22, 2:34 AM MDT | Winter Storm Warning | MSO | 25 hr |
| Oct 22, 2:34 AM MDT | Winter Weather Advisory | MSO | 48 hr |
| Oct 24, 1:53 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Oct 25, 6:51 PM MDT | Winter Weather Advisory | MSO | 9 hr |
| Oct 26, 2:09 PM MDT | Winter Weather Advisory | MSO | 22 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 7, 12:04 PM MST | Winter Weather Advisory | MSO | 53 hr |
| Nov 20, 2:06 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Nov 23, 10:54 AM MST | Winter Weather Advisory | MSO | 41 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 Storm Warning | MSO | 31 hr |
| Dec 1, 12:07 PM MST | Winter Weather Advisory | MSO | 31 hr |
| Dec 2, 7:04 PM MST | Winter Weather Advisory | MSO | 16 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 11, 1:51 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 15, 2:57 PM MST | Winter Weather Advisory | MSO | 60 hr |
| Dec 22, 8:57 PM MST | Winter Weather Advisory | MSO | 7 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 | 8 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 10 |
| Winter Storm Watch | 8 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 46 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 1 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 19 |
| Fire Weather Watch | 14 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.