Alert archive / Montana / Flathead County
Weather alerts in Flathead County, Montana, 2010
117 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Flathead County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 117
- Warnings
- 20
- Watches
- 10
- Advisories
- 70
- Busiest month
- August23 alerts
- Busiest day
- August 1, 20106 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Flathead County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 2 | 67% | 4 | 25% | 19 min |
| Flash flood warnings | 0 | 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 1, 5:14 AM MST | Winter Storm Warning | MSO | 30 hr |
| Jan 1, 5:14 AM MST | Winter Weather Advisory | MSO | 33 hr |
| Jan 3, 1:43 PM MST | Winter Storm Watch | MSO | 14 hr |
| Jan 4, 3:37 AM MST | Winter Storm Warning | MSO | 47 hr |
| Jan 4, 1:49 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Jan 10, 11:20 PM MST | Dense Fog Advisory | MSO | 13 hr |
| Jan 11, 10:26 PM MST | Dense Fog Advisory | MSO | 6 hr |
| Jan 12, 3:59 AM MST | Dense Fog Advisory | MSO | 4 hr |
| Jan 12, 1:54 PM MST | Winter Weather Advisory | MSO | 17 hr |
| Jan 13, 6:59 AM MST | Dense Fog Advisory | MSO | 8 hr |
| Jan 14, 3:29 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Jan 15, 2:45 PM MST | Winter Weather Advisory | MSO | 13 hr |
| Jan 16, 8:16 PM MST | Dense Fog Advisory | MSO | 18 hr |
| Jan 22, 3:47 AM MST | Winter Weather Advisory | MSO | 43 hr |
| Jan 30, 9:41 PM MST | Winter Weather Advisory | MSO | 17 hr |
| Feb 1, 8:41 PM MST | Dense Fog Advisory | MSO | 8 hr |
| Mar 8, 2:23 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Mar 31, 3:58 AM MDT | Winter Weather Advisory | MSO | 6 hr |
| Apr 7, 2:22 PM MDT | High Wind Warning | MSO | 31 hr |
| Apr 7, 2:22 PM MDT | Wind Advisory | MSO | 31 hr |
| Apr 7, 9:35 PM MDT | Winter Weather Advisory | MSO | 26 hr |
| Apr 12, 2:50 PM MDT | Winter Storm Watch | MSO | 13 hr |
| Apr 12, 2:50 PM MDT | Winter Storm Warning | MSO | 43 hr |
| Apr 13, 9:43 PM MDT | Winter Weather Advisory | MSO | 7 hr |
| Apr 24, 3:44 AM MDT | Lake Wind Advisory | MSO | 17 hr |
| Apr 27, 2:27 PM MDT | Winter Storm Watch | MSO | 13 hr |
| Apr 27, 2:31 PM MDT | Lake Wind Advisory | MSO | 31 hr |
| Apr 28, 3:32 AM MDT | Winter Storm Warning | MSO | 50 hr |
| May 1, 2:42 PM MDT | High Wind Watch | MSO | 31 hr |
| May 2, 11:13 AM MDT | High Wind Warning | MSO | 41 hr |
| May 2, 11:13 AM MDT | Wind Advisory | MSO | 28 hr |
| May 3, 9:22 PM MDT | Winter Weather Advisory | MSO | 7 hr |
| May 4, 4:01 AM MDT | Winter Storm Warning | MSO | 20 hr |
| May 19, 1:07 PM MDT | Lake Wind Advisory | MSO | 29 hr |
| May 20, 12:32 PM MDT | Frost Advisory | MSO | 19 hr |
| May 28, 10:09 PM MDT | Winter Weather Advisory | MSO | 14 hr |
| Jun 15, 2:27 PM MDT | Flood Watch | MSO | 53 hr |
| Jun 20, 1:20 AM MDT | Flood Watch | MSO | 37 hr |
| Jun 20, 5:32 PM MDT | Special Weather Statement | MSO | 43 min |
| Jun 24, 5:10 PM MDT | Special Weather Statement | MSO | 50 min |
| Jun 29, 1:41 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 29, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 29, 3:37 PM MDT | Severe Thunderstorm Warning | MSO | 27 min |
| Jul 11, 6:55 AM MDT | Lake Wind Advisory | MSO | 8 hr |
| Jul 11, 2:56 PM MDT | Wind Advisory | MSO | 30 hr |
| Jul 13, 9:26 AM MDT | Lake Wind Advisory | MSO | 7 hr |
| Jul 19, 1:08 PM MDT | Special Weather Statement | MSO | 52 min |
| Jul 19, 3:46 PM MDT | Special Weather Statement | MSO | 29 min |
| Jul 19, 5:10 PM MDT | Special Weather Statement | MSO | 20 min |
| Jul 22, 1:51 PM MDT | Lake Wind Advisory | MSO | 9 hr |
| Jul 22, 7:06 PM MDT | Severe Thunderstorm Warning | MSO | 39 min |
| Jul 31, 5:31 PM MDT | Severe Thunderstorm Warning | MSO | 29 min |
| Jul 31, 6:43 PM MDT | Special Weather Statement | MSO | 32 min |
| Jul 31, 7:30 PM MDT | Severe Thunderstorm Warning | MSO | 45 min |
| Jul 31, 8:10 PM MDT | Severe Thunderstorm Warning | MSO | 30 min |
| Jul 31, 8:13 PM MDT | Special Weather Statement | MSO | 32 min |
| Jul 31, 8:53 PM MDT | Special Weather Statement | MSO | 37 min |
| Aug 1, 1:34 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 2, 2:56 PM MDT | Areal Flood Advisory | MSO | 114 min |
| Aug 2, 3:13 PM MDT | Special Weather Statement | MSO | 32 min |
| Aug 2, 3:44 PM MDT | Special Weather Statement | MSO | 31 min |
| Aug 2, 4:18 PM MDT | Special Weather Statement | MSO | 42 min |
| Aug 2, 5:00 PM MDT | Special Weather Statement | MSO | 30 min |
| Aug 6, 4:09 PM MDT | Severe Thunderstorm Warning | MSO | 51 min |
| Aug 6, 4:54 PM MDT | Special Weather Statement | MSO | 66 min |
| Aug 6, 6:45 PM MDT | Special Weather Statement | MSO | 45 min |
| Aug 10, 5:19 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 12, 12:26 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Aug 20, 12:00 PM MDT | Red Flag Warning | MSO | 33 hr |
| Aug 20, 1:34 PM MDT | Lake Wind Advisory | MSO | 26 hr |
| Aug 23, 11:07 AM MDT | Frost Advisory | MSO | 22 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, 3:07 AM MDT | Lake Wind Advisory | MSO | 19 hr |
| Aug 31, 2:41 PM MDT | Winter Weather Advisory | MSO | 27 hr |
| Sep 4, 2:29 PM MDT | Winter Weather Advisory | MSO | 37 hr |
| Sep 16, 3:53 AM MDT | Winter Weather Advisory | MSO | 34 hr |
| Sep 16, 7:06 PM MDT | Lake Wind Advisory | MSO | 15 hr |
| Oct 23, 1:35 PM MDT | Winter Weather Advisory | MSO | 70 hr |
| Oct 30, 7:44 AM MDT | Dense Fog Advisory | MSO | 3 hr |
| Nov 5, 7:30 AM MDT | Dense Fog Advisory | MSO | 6 hr |
| Nov 11, 2:45 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Nov 14, 2:24 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Nov 15, 4:42 AM MST | Winter Storm Warning | MSO | 33 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 19, 2:26 PM MST | Lake Wind Advisory | MSO | 13 hr |
| Nov 20, 3:21 AM MST | Lake Wind Advisory | MSO | 8 hr |
| Nov 20, 3:37 AM MST | Wind Chill Advisory | MSO | 31 hr |
| Nov 21, 3:05 AM MST | Winter Storm Warning | MSO | 58 hr |
| Nov 21, 3:05 AM MST | Winter Weather Advisory | MSO | 58 hr |
| Nov 22, 2:27 PM MST | Blizzard Warning | MSO | 23 hr |
| Nov 23, 10:21 AM MST | Wind Chill Advisory | MSO | 10 hr |
| Nov 25, 8:02 AM MST | Winter Weather Advisory | MSO | 3 days |
| Nov 29, 1:57 PM MST | Winter Weather Advisory | MSO | 43 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, 7:55 AM MST | Freezing Rain Advisory | MSO | 7 hr |
| Dec 8, 10:26 AM MST | Winter Weather Advisory | MSO | 4 hr |
| Dec 8, 2:40 PM MST | Winter Storm Warning | MSO | 56 hr |
| Dec 8, 7:44 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 9, 4:36 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Dec 10, 2:54 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 19, 3:52 AM MST | Winter Weather Advisory | MSO | 33 hr |
| Dec 21, 6:04 AM MST | Freezing Fog Advisory | MSO | 7 hr |
| Dec 21, 5:48 PM MST | Freezing Fog Advisory | MSO | 19 hr |
| Dec 23, 9:26 PM MST | Freezing Fog Advisory | MSO | 11 hr |
| Dec 25, 5:44 AM MST | Freezing Fog Advisory | MSO | 8 hr |
| Dec 25, 6:17 PM MST | Freezing Fog Advisory | MSO | 19 hr |
| Dec 26, 3:38 AM MST | Winter Weather Advisory | MSO | 38 hr |
| Dec 26, 6:27 AM MST | Freezing Rain Advisory | MSO | 5 hr |
| Dec 27, 3:49 AM MST | Winter Storm Watch | MSO | 31 hr |
| Dec 27, 3:49 AM MST | Winter Weather Advisory | MSO | 13 hr |
| Dec 27, 5:17 PM MST | Winter Storm Warning | MSO | 60 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.