Alert archive / Montana / Lake County
Weather alerts in Lake County, Montana, 2009
105 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 105
- Warnings
- 22
- Watches
- 17
- Advisories
- 61
- Busiest month
- March24 alerts
- Busiest day
- January 5, 20093 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, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 30 | 13 | 57% | 35 | 80% | 22 min |
| NWS Missoula, MT: flash flood warnings | 3 | 1 | 67% | 8 | 13% | 48 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 1, 4:22 AM MST | Winter Storm Warning | MSO | 37 hr |
| Jan 1, 12:57 PM MST | Winter Weather Advisory | MSO | 28 hr |
| Jan 3, 3:03 PM MST | Winter Storm Watch | MSO | 13 hr |
| Jan 4, 4:10 AM MST | Winter Storm Warning | MSO | 41 hr |
| Jan 4, 9:21 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Jan 5, 2:56 PM MST | Winter Storm Watch | MSO | 13 hr |
| Jan 5, 3:57 PM MST | Flood Watch | MSO | 44 hr |
| Jan 6, 4:15 AM MST | Winter Storm Warning | MSO | 30 hr |
| Jan 16, 7:27 AM MST | Dense Fog Advisory | MSO | 49 hr |
| Jan 17, 10:33 AM MST | Dense Fog Advisory | MSO | 26 hr |
| Jan 24, 3:25 AM MST | Wind Chill Advisory | MSO | 35 hr |
| Jan 26, 2:41 PM MST | Winter Weather Advisory | MSO | 48 hr |
| Jan 30, 4:43 AM MST | Winter Storm Watch | MSO | 10 hr |
| Jan 30, 2:43 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Feb 3, 2:48 PM MST | Dense Fog Advisory | MSO | 24 hr |
| Feb 4, 5:36 PM MST | Dense Fog Advisory | MSO | 17 hr |
| Feb 6, 3:26 AM MST | Freezing Rain Advisory | MSO | 6 hr |
| Feb 6, 8:55 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Feb 18, 8:13 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Feb 23, 2:36 PM MST | Winter Weather Advisory | MSO | 27 hr |
| Feb 24, 3:06 PM MST | Winter Storm Watch | MSO | 13 hr |
| Feb 25, 4:32 AM MST | Winter Storm Warning | MSO | 42 hr |
| Feb 25, 4:32 AM MST | Winter Weather Advisory | MSO | 10 hr |
| Mar 3, 6:19 AM MST | Dense Fog Advisory | MSO | 3 hr |
| Mar 3, 2:08 PM MST | Winter Storm Watch | MSO | 43 hr |
| Mar 4, 2:29 PM MST | Winter Storm Warning | MSO | 42 hr |
| Mar 4, 2:29 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Mar 5, 12:52 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Mar 7, 4:24 AM MST | Winter Storm Warning | MSO | 37 hr |
| Mar 7, 4:24 AM MST | Winter Weather Advisory | MSO | 37 hr |
| Mar 8, 2:23 PM MDT | Wind Chill Advisory | MSO | 23 hr |
| Mar 9, 4:45 AM MDT | Wind Chill Warning | MSO | 10 hr |
| Mar 9, 4:45 AM MDT | Winter Weather Advisory | MSO | 32 hr |
| Mar 9, 2:45 PM MDT | Winter Storm Warning | MSO | 24 hr |
| Mar 9, 11:08 PM MDT | Wind Chill Advisory | MSO | 5 hr |
| Mar 14, 3:01 PM MDT | Winter Storm Watch | MSO | 6 hr |
| Mar 14, 9:07 PM MDT | Winter Storm Warning | MSO | 47 hr |
| Mar 15, 8:38 PM MDT | Wind Advisory | MSO | 3 hr |
| Mar 17, 7:47 AM MDT | Winter Weather Advisory | MSO | 4 hr |
| Mar 23, 2:10 PM MDT | Winter Storm Watch | MSO | 38 hr |
| Mar 24, 2:12 PM MDT | Winter Storm Warning | MSO | 33 hr |
| Mar 24, 2:12 PM MDT | Winter Weather Advisory | MSO | 33 hr |
| Mar 27, 3:09 PM MDT | Winter Storm Watch | MSO | 13 hr |
| Mar 28, 4:10 AM MDT | Winter Storm Warning | MSO | 44 hr |
| Mar 28, 4:10 AM MDT | Winter Weather Advisory | MSO | 44 hr |
| Mar 30, 2:51 PM MDT | Winter Weather Advisory | MSO | 39 hr |
| Mar 31, 1:10 PM MDT | Winter Storm Warning | MSO | 17 hr |
| Apr 1, 2:14 PM MDT | Winter Weather Advisory | MSO | 8 hr |
| Apr 1, 9:58 PM MDT | Winter Weather Advisory | MSO | 32 hr |
| Apr 22, 8:10 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| Apr 23, 7:58 AM MDT | Winter Weather Advisory | MSO | 7 hr |
| Apr 26, 2:49 PM MDT | Winter Storm Watch | MSO | 13 hr |
| Apr 27, 3:54 AM MDT | Winter Storm Warning | MSO | 56 hr |
| Apr 27, 7:26 AM MDT | Winter Weather Advisory | MSO | 7 hr |
| Apr 28, 12:51 PM MDT | Wind Advisory | MSO | 7 hr |
| May 5, 10:40 AM MDT | Wind Advisory | MSO | 7 hr |
| May 6, 2:13 PM MDT | Lake Wind Advisory | MSO | 30 hr |
| May 11, 2:41 PM MDT | Winter Weather Advisory | MSO | 30 hr |
| May 12, 10:35 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| May 13, 2:38 PM MDT | Lake Wind Advisory | MSO | 29 hr |
| May 30, 3:15 PM MDT | Severe Thunderstorm Warning | MSO | 30 min |
| Jun 14, 3:09 PM MDT | Special Weather Statement | MSO | 66 min |
| Jun 25, 9:50 AM MDT | Lake Wind Advisory | MSO | 6 hr |
| Jun 28, 8:52 AM MDT | Lake Wind Advisory | MSO | 10 hr |
| Jul 24, 1:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 24, 2:49 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 12:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 28, 2:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Aug 11, 3:18 AM MDT | Lake Wind Advisory | MSO | 15 hr |
| Sep 18, 2:35 PM MDT | Lake Wind Advisory | MSO | 29 hr |
| Sep 20, 2:39 PM MDT | Frost Advisory | MSO | 18 hr |
| Sep 24, 2:45 PM MDT | Fire Weather Watch | MSO | 23 hr |
| Sep 25, 1:47 PM MDT | Red Flag Warning | MSO | 33 hr |
| Sep 25, 2:35 PM MDT | High Wind Watch | MSO | 12 hr |
| Sep 26, 2:43 AM MDT | High Wind Warning | MSO | 18 hr |
| Oct 2, 2:32 PM MDT | High Wind Watch | MSO | 24 hr |
| Oct 3, 2:05 PM MDT | High Wind Warning | MSO | 14 hr |
| Oct 3, 2:05 PM MDT | Wind Advisory | MSO | 20 hr |
| Oct 3, 2:06 PM MDT | Red Flag Warning | MSO | 14 hr |
| Oct 6, 2:50 PM MDT | Winter Weather Advisory | MSO | 29 hr |
| Oct 7, 1:56 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Oct 10, 4:32 AM MDT | Wind Chill Advisory | MSO | 25 hr |
| Oct 13, 5:07 AM MDT | Freezing Rain Advisory | MSO | 26 hr |
| Oct 14, 7:15 AM MDT | Winter Weather Advisory | MSO | 4 hr |
| Oct 25, 3:54 AM MDT | Winter Storm Watch | MSO | 24 hr |
| Oct 26, 3:59 AM MDT | Winter Storm Warning | MSO | 32 hr |
| Oct 31, 3:35 AM MDT | Lake Wind Advisory | MSO | 17 hr |
| Oct 31, 3:35 AM MDT | Wind Advisory | MSO | 17 hr |
| Nov 5, 2:40 PM MST | Lake Wind Advisory | MSO | 28 hr |
| Nov 6, 4:22 AM MST | Winter Storm Watch | MSO | 23 hr |
| Nov 7, 3:23 AM MST | Winter Storm Warning | MSO | 28 hr |
| Nov 11, 6:46 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Nov 30, 2:16 PM MST | Winter Weather Advisory | MSO | 14 hr |
| Dec 4, 2:05 PM MST | Wind Chill Warning | MSO | 69 hr |
| Dec 4, 2:05 PM MST | Winter Weather Advisory | MSO | 27 hr |
| Dec 5, 2:27 PM MST | Winter Weather Advisory | MSO | 17 hr |
| Dec 11, 4:27 AM MST | Winter Storm Watch | MSO | 24 hr |
| Dec 11, 1:30 PM MST | Winter Storm Warning | MSO | 3 days |
| Dec 14, 2:53 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Dec 15, 4:56 PM MST | Winter Weather Advisory | MSO | 18 hr |
| Dec 16, 6:34 PM MST | Freezing Rain Advisory | MSO | 16 hr |
| Dec 19, 2:23 PM MST | Winter Weather Advisory | MSO | 41 hr |
| Dec 20, 5:19 AM MST | Freezing Rain Advisory | MSO | 4 hr |
| Dec 22, 5:08 AM MST | Winter Weather Advisory | MSO | 30 hr |
| Dec 30, 2:47 PM MST | Winter Weather Advisory | MSO | 20 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 | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 1 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 15 |
| Winter Storm Watch | 12 |
| Freezing Rain Advisory | 4 |
| Winter Weather Advisory | 32 |
| Cold | |
| Wind Chill Warning | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Lake Wind Advisory | 10 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.