Alert archive / Montana / Lake County
Weather alerts in Lake County, Montana, 2020
125 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 125
- Warnings
- 20
- Watches
- 11
- Advisories
- 75
- Busiest month
- October17 alerts
- Busiest day
- June 13, 20205 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, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 2 | 0% | 2 | 50% | 4 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 7 | 5 | 29% | 29 | 69% | 12 min |
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 3, 8:21 AM MST | High Wind Warning | MSO | 35 hr |
| Jan 3, 8:21 AM MST | Wind Advisory | MSO | 35 hr |
| Jan 5, 12:57 PM MST | Winter Weather Advisory | MSO | 4 days |
| Jan 7, 8:21 AM MST | Winter Storm Warning | MSO | 9 hr |
| Jan 10, 4:02 AM MST | Winter Weather Advisory | MSO | 3 days |
| Jan 10, 1:34 PM MST | Winter Storm Watch | MSO | 25 hr |
| Jan 11, 2:46 PM MST | Winter Storm Warning | MSO | 66 hr |
| Jan 12, 5:45 AM MST | Winter Weather Advisory | MSO | 29 hr |
| Jan 13, 2:20 PM MST | Winter Weather Advisory | MSO | 37 hr |
| Jan 16, 1:39 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Jan 18, 9:27 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Jan 20, 6:05 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Jan 25, 3:31 AM MST | Winter Weather Advisory | MSO | 7 hr |
| Jan 27, 2:22 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Jan 31, 1:20 PM MST | Wind Advisory | MSO | 28 hr |
| Feb 1, 9:01 AM MST | High Wind Warning | MSO | 11 hr |
| Feb 1, 2:04 PM MST | Winter Weather Advisory | MSO | 34 hr |
| Feb 4, 4:04 AM MST | Winter Storm Watch | MSO | 24 hr |
| Feb 4, 1:48 PM MST | Winter Weather Advisory | MSO | 71 hr |
| Feb 7, 2:00 PM MST | Winter Weather Advisory | MSO | 33 hr |
| Feb 8, 1:46 PM MST | Winter Weather Advisory | MSO | 6 hr |
| Feb 12, 3:14 AM MST | Winter Weather Advisory | MSO | 8 hr |
| Feb 13, 3:45 AM MST | Winter Weather Advisory | MSO | 4 days |
| Feb 22, 2:43 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Mar 2, 2:41 PM MST | Winter Weather Advisory | MSO | 17 hr |
| Mar 3, 2:23 PM MST | Wind Advisory | MSO | 27 hr |
| Mar 3, 2:26 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Mar 4, 8:00 AM MST | High Wind Warning | MSO | 3 hr |
| Mar 10, 2:30 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Mar 11, 2:13 PM MDT | Winter Storm Watch | MSO | 24 hr |
| Mar 11, 6:20 PM MDT | Special Weather Statement | MSO | 40 min |
| Mar 11, 6:45 PM MDT | Winter Weather Advisory | MSO | 5 hr |
| Mar 12, 2:24 PM MDT | Winter Storm Warning | MSO | 23 hr |
| Mar 12, 2:24 PM MDT | Winter Weather Advisory | MSO | 49 hr |
| Mar 13, 3:26 AM MDT | High Wind Warning | MSO | 32 hr |
| Mar 29, 2:27 PM MDT | Wind Advisory | MSO | 31 hr |
| Mar 29, 2:29 PM MDT | Winter Weather Advisory | MSO | 70 hr |
| Mar 30, 4:46 PM MDT | Special Weather Statement | MSO | 29 min |
| Apr 1, 2:43 PM MDT | Winter Weather Advisory | MSO | 18 hr |
| Apr 3, 7:08 AM MDT | Winter Weather Advisory | MSO | 5 hr |
| Apr 3, 9:32 PM MDT | Winter Weather Advisory | MSO | 8 hr |
| Apr 8, 3:44 AM MDT | Winter Storm Watch | MSO | 59 hr |
| Apr 10, 3:26 AM MDT | Winter Storm Warning | MSO | 42 hr |
| Apr 10, 2:45 PM MDT | High Wind Warning | MSO | 20 hr |
| Apr 14, 2:59 AM MDT | Winter Weather Advisory | MSO | 33 hr |
| Apr 17, 3:49 AM MDT | Winter Weather Advisory | MSO | 28 hr |
| May 5, 2:05 PM MDT | Wind Advisory | MSO | 31 hr |
| May 5, 2:05 PM MDT | Winter Weather Advisory | MSO | 43 hr |
| May 11, 4:05 AM MDT | Winter Weather Advisory | MSO | 31 hr |
| May 17, 8:52 PM MDT | Special Weather Statement | MSO | 53 min |
| May 20, 11:26 PM MDT | Lake Wind Advisory | MSO | 19 hr |
| May 31, 7:12 AM MDT | Special Weather Statement | MSO | 33 min |
| May 31, 8:14 AM MDT | Severe Thunderstorm Warning | MSO | 31 min |
| Jun 5, 8:40 PM MDT | Special Weather Statement | MSO | 50 min |
| Jun 12, 7:14 PM MDT | Special Weather Statement | MSO | 31 min |
| Jun 12, 7:15 PM MDT | Special Weather Statement | MSO | 30 min |
| Jun 12, 7:45 PM MDT | Special Weather Statement | MSO | 30 min |
| Jun 13, 8:27 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| Jun 13, 2:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 16, 10:40 AM MDT | Winter Weather Advisory | MSO | 22 hr |
| Jun 24, 3:50 PM MDT | Special Weather Statement | MSO | 55 min |
| Jun 24, 3:56 PM MDT | Severe Thunderstorm Warning | MSO | 34 min |
| Jun 24, 4:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 24, 7:25 PM MDT | Special Weather Statement | MSO | 50 min |
| Jun 27, 1:50 PM MDT | Flood Watch | MSO | 3 days |
| Jul 3, 9:59 PM MDT | Special Weather Statement | MSO | 31 min |
| Jul 7, 2:52 AM MDT | Special Weather Statement | MSO | 23 min |
| Jul 7, 4:57 AM MDT | Special Weather Statement | MSO | 63 min |
| Jul 28, 2:51 PM MDT | Heat Advisory | MSO | 4 days |
| Aug 6, 9:17 PM MDT | Special Weather Statement | MSO | 28 min |
| Aug 6, 9:48 PM MDT | Special Weather Statement | MSO | 27 min |
| Aug 14, 11:30 AM MDT | Heat Advisory | MSO | 4 days |
| Aug 14, 11:56 AM MDT | Heat Advisory | MSO | 4 days |
| Aug 27, 1:56 PM MDT | Lake Wind Advisory | MSO | 53 hr |
| Aug 27, 2:47 PM MDT | Fire Weather Watch | MSO | 24 hr |
| Aug 28, 2:19 PM MDT | Red Flag Warning | MSO | 34 hr |
| Sep 4, 12:29 PM MDT | Red Flag Warning | MSO | 34 hr |
| Sep 4, 12:34 PM MDT | High Wind Watch | MSO | 49 hr |
| Sep 4, 12:35 PM MDT | Winter Storm Watch | MSO | 49 hr |
| Sep 6, 1:07 PM MDT | Winter Weather Advisory | MSO | 35 hr |
| Sep 6, 1:09 PM MDT | High Wind Warning | MSO | 35 hr |
| Sep 6, 1:09 PM MDT | Wind Advisory | MSO | 30 hr |
| Sep 7, 2:12 PM MDT | Freeze Warning | MSO | 19 hr |
| Sep 23, 2:06 PM MDT | Lake Wind Advisory | MSO | 29 hr |
| Oct 9, 11:16 AM MDT | Lake Wind Advisory | MSO | 37 hr |
| Oct 11, 2:19 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Oct 12, 2:14 AM MDT | Lake Wind Advisory | MSO | 16 hr |
| Oct 12, 2:14 AM MDT | Wind Advisory | MSO | 16 hr |
| Oct 12, 2:18 PM MDT | High Wind Watch | MSO | 24 hr |
| Oct 12, 2:22 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Oct 13, 3:05 AM MDT | High Wind Warning | MSO | 24 hr |
| Oct 16, 3:52 AM MDT | Winter Weather Advisory | MSO | 3 days |
| Oct 16, 11:44 AM MDT | Lake Wind Advisory | MSO | 7 hr |
| Oct 17, 2:12 PM MDT | Winter Weather Advisory | MSO | 44 hr |
| Oct 20, 2:45 PM MDT | Winter Weather Advisory | MSO | 36 hr |
| Oct 22, 2:56 AM MDT | Winter Storm Watch | MSO | 11 hr |
| Oct 22, 1:55 PM MDT | Winter Storm Warning | MSO | 52 hr |
| Oct 23, 4:36 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 25, 10:13 AM MDT | Special Weather Statement | MSO | 62 min |
| Oct 26, 12:02 PM MDT | Air Stagnation Advisory | MSO | 4 days |
| Oct 29, 1:59 PM MDT | Lake Wind Advisory | MSO | 30 hr |
| Nov 4, 11:31 AM MST | Lake Wind Advisory | MSO | 30 hr |
| Nov 5, 1:39 PM MST | Winter Storm Watch | MSO | 46 hr |
| Nov 7, 3:36 AM MST | Winter Storm Warning | MSO | 35 hr |
| Nov 7, 3:36 AM MST | Winter Weather Advisory | MSO | 49 hr |
| Nov 10, 6:55 AM MST | Winter Weather Advisory | MSO | 34 hr |
| Nov 10, 12:58 PM MST | Winter Weather Advisory | MSO | 28 hr |
| Nov 10, 9:48 PM MST | Winter Storm Warning | MSO | 7 hr |
| Nov 12, 2:33 PM MST | Lake Wind Advisory | MSO | 48 hr |
| Nov 12, 2:40 PM MST | Winter Weather Advisory | MSO | 47 hr |
| Nov 15, 11:20 PM MST | Winter Weather Advisory | MSO | 11 hr |
| Nov 18, 1:54 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Nov 24, 1:45 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Nov 30, 1:11 PM MST | Winter Weather Advisory | MSO | 19 hr |
| Nov 30, 2:27 PM MST | Air Stagnation Advisory | MSO | 8 days |
| Dec 8, 1:54 PM MST | Winter Weather Advisory | MSO | 33 hr |
| Dec 11, 11:22 AM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 15, 3:26 AM MST | Winter Weather Advisory | MSO | 28 hr |
| Dec 16, 11:32 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Dec 18, 2:16 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 19, 2:24 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Dec 21, 2:50 PM MST | Winter Weather Advisory | MSO | 32 hr |
| Dec 22, 10:39 AM MST | Snow Squall Warning | MSO | 36 min |
| Dec 25, 3:37 AM MST | Winter Weather Advisory | MSO | 41 hr |
| Dec 29, 3:29 AM MST | Winter Weather Advisory | MSO | 61 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 | 2 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 16 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 52 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 7 |
| High Wind Watch | 2 |
| Lake Wind Advisory | 10 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Air Stagnation Advisory | 2 |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.