Alert archive / Montana / Lake County
Weather alerts in Lake County, Montana, 2011
139 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lake County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 139
- Warnings
- 20
- Watches
- 12
- Advisories
- 89
- Busiest month
- November21 alerts
- Busiest day
- July 13, 20116 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lake County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 2 | 33% | 7 | 86% | 14 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 17 | 9 | 47% | 25 | 60% | 16 min |
| NWS Missoula, MT: flash flood warnings | 4 | 0 | 100% | 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 4, 2:49 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Jan 7, 4:00 AM MST | Winter Weather Advisory | MSO | 64 hr |
| Jan 10, 2:07 PM MST | Winter Storm Watch | MSO | 14 hr |
| Jan 11, 3:58 AM MST | Winter Storm Warning | MSO | 61 hr |
| Jan 11, 3:58 AM MST | Winter Weather Advisory | MSO | 11 hr |
| Jan 11, 3:00 PM MST | Winter Weather Advisory | MSO | 50 hr |
| Jan 13, 10:07 PM MST | Freezing Rain Advisory | MSO | 11 hr |
| Jan 14, 2:31 PM MST | Winter Weather Advisory | MSO | 12 hr |
| Jan 18, 3:21 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Jan 20, 3:41 PM MST | Winter Weather Advisory | MSO | 4 hr |
| Jan 21, 3:29 AM MST | Winter Storm Warning | MSO | 29 hr |
| Jan 21, 3:29 AM MST | Winter Weather Advisory | MSO | 26 hr |
| Jan 24, 10:51 PM MST | Winter Weather Advisory | MSO | 12 hr |
| Jan 26, 1:36 AM MST | Dense Fog Advisory | MSO | 2 hr |
| Jan 27, 3:46 AM MST | Dense Fog Advisory | MSO | 9 hr |
| Jan 28, 3:21 AM MST | Winter Storm Watch | MSO | 23 hr |
| Jan 29, 2:45 AM MST | Winter Storm Warning | MSO | 38 hr |
| Jan 30, 3:00 PM MST | Wind Chill Warning | MSO | 22 hr |
| Feb 3, 1:32 PM MST | Winter Weather Advisory | MSO | 30 hr |
| Feb 5, 3:04 PM MST | Winter Storm Watch | MSO | 13 hr |
| Feb 6, 4:13 AM MST | Winter Storm Warning | MSO | 53 hr |
| Feb 7, 11:02 PM MST | Wind Chill Advisory | MSO | 10 hr |
| Feb 11, 2:03 PM MST | Wind Advisory | MSO | 44 hr |
| Feb 11, 2:09 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Feb 14, 1:53 PM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 18, 7:25 AM MST | Winter Weather Advisory | MSO | 3 hr |
| Feb 18, 11:39 AM MST | Wind Chill Advisory | MSO | 16 hr |
| Feb 19, 6:14 PM MST | Winter Weather Advisory | MSO | 34 hr |
| Feb 21, 4:31 AM MST | Winter Weather Advisory | MSO | 52 hr |
| Feb 21, 2:36 PM MST | Winter Storm Warning | MSO | 72 hr |
| Feb 23, 5:18 AM MST | Winter Weather Advisory | MSO | 54 hr |
| Feb 24, 7:34 AM MST | Wind Chill Warning | MSO | 25 hr |
| Feb 25, 1:22 PM MST | Winter Storm Watch | MSO | 25 hr |
| Feb 26, 1:57 PM MST | Wind Advisory | MSO | 56 hr |
| Feb 26, 1:58 PM MST | Winter Storm Warning | MSO | 3 days |
| Feb 26, 1:58 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Feb 28, 1:21 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Mar 4, 7:14 AM MST | Winter Weather Advisory | MSO | 3 hr |
| Mar 5, 9:05 AM MST | Winter Weather Advisory | MSO | 3 hr |
| Mar 6, 2:58 AM MST | Wind Chill Advisory | MSO | 8 hr |
| Mar 10, 9:56 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 14, 2:37 PM MDT | Winter Weather Advisory | MSO | 42 hr |
| Mar 16, 9:06 AM MDT | Lake Wind Advisory | MSO | 9 hr |
| Mar 21, 3:14 AM MDT | Winter Weather Advisory | MSO | 33 hr |
| Mar 29, 2:10 PM MDT | Lake Wind Advisory | MSO | 20 hr |
| Mar 30, 10:30 AM MDT | Lake Wind Advisory | MSO | 7 hr |
| Mar 31, 9:43 AM MDT | Lake Wind Advisory | MSO | 7 hr |
| Apr 1, 11:31 AM MDT | Winter Weather Advisory | MSO | 48 hr |
| Apr 2, 3:38 PM MDT | Lake Wind Advisory | MSO | 4 hr |
| Apr 3, 2:37 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Apr 5, 3:55 AM MDT | Lake Wind Advisory | MSO | 16 hr |
| Apr 5, 3:55 AM MDT | Wind Advisory | MSO | 16 hr |
| Apr 14, 2:01 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Apr 15, 1:59 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| Apr 16, 2:17 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Apr 17, 11:32 AM MDT | Winter Storm Warning | MSO | 12 hr |
| Apr 18, 12:49 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Apr 20, 2:13 PM MDT | Winter Weather Advisory | MSO | 44 hr |
| Apr 21, 2:03 PM MDT | Winter Storm Warning | MSO | 18 hr |
| Apr 25, 2:22 PM MDT | Winter Weather Advisory | MSO | 20 hr |
| Apr 28, 3:13 AM MDT | Winter Weather Advisory | MSO | 51 hr |
| May 14, 3:15 AM MDT | Wind Advisory | MSO | 19 hr |
| May 24, 1:24 PM MDT | Areal Flood Advisory | MSO | 72 hr |
| May 25, 3:12 AM MDT | Winter Weather Advisory | MSO | 54 hr |
| Jun 2, 2:36 PM MDT | Winter Weather Advisory | MSO | 17 hr |
| Jun 6, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 7, 10:27 AM MDT | Areal Flood Warning | MSO | 70 hr |
| Jun 14, 3:03 PM MDT | Lake Wind Advisory | MSO | 30 hr |
| Jun 18, 2:23 PM MDT | Special Weather Statement | MSO | 52 min |
| Jun 22, 12:16 PM MDT | Flood Watch | MSO | 68 hr |
| Jun 23, 12:16 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jun 23, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 7:03 AM MDT | Special Weather Statement | MSO | 27 min |
| Jun 29, 12:04 PM MDT | Lake Wind Advisory | MSO | 6 hr |
| Jun 29, 12:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 30, 7:30 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| Jul 1, 10:14 AM MDT | Flood Watch | MSO | 49 hr |
| Jul 7, 11:43 AM MDT | Wind Advisory | MSO | 33 hr |
| Jul 12, 12:56 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 12, 10:56 PM MDT | Special Weather Statement | MSO | 34 min |
| Jul 12, 11:01 PM MDT | Special Weather Statement | MSO | 44 min |
| Jul 13, 12:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 13, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 5:13 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 13, 5:46 PM MDT | Special Weather Statement | MSO | 44 min |
| Jul 13, 7:33 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 16, 6:05 PM MDT | Special Weather Statement | MSO | 40 min |
| Jul 19, 3:56 PM MDT | Special Weather Statement | MSO | 49 min |
| Jul 19, 5:30 PM MDT | Severe Thunderstorm Warning | MSO | 30 min |
| Jul 25, 5:38 PM MDT | Special Weather Statement | MSO | 52 min |
| Jul 25, 5:48 PM MDT | Severe Thunderstorm Warning | MSO | 42 min |
| Jul 25, 7:52 PM MDT | Severe Thunderstorm Warning | MSO | 38 min |
| Jul 31, 5:25 AM MDT | Special Weather Statement | MSO | 50 min |
| Aug 5, 3:59 PM MDT | Special Weather Statement | MSO | 26 min |
| Aug 8, 8:52 PM MDT | Special Weather Statement | MSO | 53 min |
| Aug 30, 11:33 AM MDT | Winter Weather Advisory | MSO | 48 hr |
| Sep 2, 7:12 AM MDT | Lake Wind Advisory | MSO | 6 hr |
| Sep 2, 7:12 AM MDT | Wind Advisory | MSO | 6 hr |
| Sep 2, 1:32 PM MDT | Frost Advisory | MSO | 19 hr |
| Sep 3, 2:19 PM MDT | Frost Advisory | MSO | 19 hr |
| Sep 19, 9:43 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| Sep 19, 10:53 AM MDT | Special Weather Statement | MSO | 67 min |
| Sep 20, 2:22 PM MDT | Frost Advisory | MSO | 19 hr |
| Sep 26, 2:45 PM MDT | Lake Wind Advisory | MSO | 31 hr |
| Oct 6, 3:55 AM MDT | Winter Weather Advisory | MSO | 14 hr |
| Oct 7, 3:10 AM MDT | Winter Weather Advisory | MSO | 18 hr |
| Oct 14, 10:55 AM MDT | Winter Weather Advisory | MSO | 19 hr |
| Oct 19, 7:50 AM MDT | Dense Fog Advisory | MSO | 3 hr |
| Oct 28, 11:12 AM MDT | Winter Weather Advisory | MSO | 22 hr |
| Nov 9, 2:11 PM MST | Winter Storm Watch | MSO | 22 hr |
| Nov 10, 12:24 PM MST | Winter Storm Warning | MSO | 45 hr |
| Nov 10, 2:02 PM MST | Lake Wind Advisory | MSO | 24 hr |
| Nov 11, 2:16 PM MST | Lake Wind Advisory | MSO | 13 hr |
| Nov 12, 9:14 AM MST | Lake Wind Advisory | MSO | 11 hr |
| Nov 12, 1:50 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Nov 13, 7:57 AM MST | Lake Wind Advisory | MSO | 12 hr |
| Nov 15, 2:10 PM MST | Winter Storm Watch | MSO | 14 hr |
| Nov 16, 3:54 AM MST | Winter Storm Warning | MSO | 43 hr |
| Nov 17, 4:48 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Nov 17, 2:36 PM MST | Wind Chill Advisory | MSO | 23 hr |
| Nov 17, 2:36 PM MST | Winter Weather Advisory | MSO | 38 hr |
| Nov 18, 8:31 AM MST | Winter Storm Warning | MSO | 20 hr |
| Nov 20, 4:27 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Nov 20, 2:48 PM MST | Winter Weather Advisory | MSO | 13 hr |
| Nov 21, 3:42 AM MST | Winter Storm Warning | MSO | 7 hr |
| Nov 21, 10:27 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Nov 23, 1:48 PM MST | Winter Weather Advisory | MSO | 48 hr |
| Nov 28, 2:44 PM MST | Winter Storm Watch | MSO | 14 hr |
| Nov 29, 4:38 AM MST | Winter Storm Warning | MSO | 36 hr |
| Nov 29, 4:38 AM MST | Winter Weather Advisory | MSO | 36 hr |
| Dec 8, 8:26 AM MST | Dense Fog Advisory | MSO | 4 hr |
| Dec 9, 2:47 PM MST | Dense Fog Advisory | MSO | 20 hr |
| Dec 10, 2:44 PM MST | Dense Fog Advisory | MSO | 17 hr |
| Dec 17, 7:35 PM MST | Dense Fog Advisory | MSO | 9 hr |
| Dec 20, 2:45 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Dec 25, 6:24 AM MST | Freezing Fog Advisory | MSO | 6 hr |
| Dec 27, 3:15 AM MST | Winter Weather Advisory | MSO | 57 hr |
| Dec 29, 2:30 PM MST | Winter Weather Advisory | MSO | 42 hr |
| Dec 29, 10:14 PM MST | Winter Storm Warning | MSO | 29 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 | 3 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 12 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 14 |
| Winter Storm Watch | 7 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 50 |
| Cold | |
| Wind Chill Warning | 2 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Lake Wind Advisory | 16 |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.