Alert archive / Minnesota / Lake County
Weather alerts in Lake County, Minnesota, 2009
91 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
- 91
- Warnings
- 17
- Watches
- 10
- Advisories
- 43
- Busiest month
- August13 alerts
- Busiest day
- July 22, 20095 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 Duluth, MN: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Duluth, MN: severe thunderstorm warnings | 49 | 15 | 69% | 23 | 96% | 22 min |
| NWS Duluth, MN: flash flood warnings | 2 | 2 | 0% | 2 | 100% | 56 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 3:14 PM CST | Winter Storm Watch | DLH | 24 hr |
| Jan 2, 3:38 PM CST | Winter Storm Warning | DLH | 38 hr |
| Jan 4, 11:53 AM CST | Wind Chill Advisory | DLH | 21 hr |
| Jan 11, 9:15 AM CST | Wind Chill Watch | DLH | 19 hr |
| Jan 12, 4:31 AM CST | Wind Chill Warning | DLH | 31 hr |
| Jan 13, 3:13 PM CST | Wind Chill Warning | DLH | 69 hr |
| Jan 16, 11:35 PM CST | Winter Weather Advisory | DLH | 15 hr |
| Jan 23, 4:15 AM CST | Wind Chill Advisory | DLH | 4 days |
| Feb 2, 8:29 AM CST | Winter Storm Warning | DLH | 7 hr |
| Feb 2, 8:29 AM CST | Winter Weather Advisory | DLH | 7 hr |
| Feb 2, 3:44 PM CST | Wind Chill Advisory | DLH | 18 hr |
| Feb 6, 3:14 PM CST | Winter Storm Watch | DLH | 48 hr |
| Feb 8, 3:27 PM CST | Ice Storm Warning | DLH | 30 hr |
| Feb 10, 3:07 AM CST | Freezing Rain Advisory | DLH | 7 hr |
| Feb 12, 6:03 AM CST | Winter Weather Advisory | DLH | 29 hr |
| Feb 17, 3:45 AM CST | Winter Weather Advisory | DLH | 41 hr |
| Feb 18, 3:47 AM CST | Wind Chill Advisory | DLH | 23 hr |
| Feb 25, 3:45 PM CST | Winter Weather Advisory | DLH | 42 hr |
| Feb 26, 3:30 PM CST | Wind Chill Advisory | DLH | 18 hr |
| Mar 1, 3:30 AM CST | Wind Chill Advisory | DLH | 5 hr |
| Mar 8, 4:48 AM CDT | Winter Storm Watch | DLH | 35 hr |
| Mar 9, 3:41 PM CDT | Winter Storm Warning | DLH | 44 hr |
| Mar 11, 9:14 PM CDT | Wind Chill Advisory | DLH | 14 hr |
| Mar 20, 7:05 AM CDT | Winter Weather Advisory | DLH | 13 hr |
| Mar 21, 4:07 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Mar 22, 3:31 PM CDT | Freezing Rain Advisory | DLH | 36 hr |
| Mar 23, 7:58 AM CDT | Ice Storm Warning | DLH | 47 hr |
| Mar 29, 3:48 AM CDT | Winter Storm Watch | DLH | 30 hr |
| Mar 29, 4:01 PM CDT | Winter Storm Warning | DLH | 70 hr |
| Apr 19, 3:52 AM CDT | Winter Weather Advisory | DLH | 50 hr |
| Apr 20, 1:46 AM CDT | Winter Storm Warning | DLH | 19 hr |
| Apr 23, 9:25 AM CDT | Red Flag Warning | DLH | 10 hr |
| May 29, 3:17 PM CDT | Freeze Watch | DLH | 15 hr |
| May 30, 6:34 AM CDT | Freeze Warning | DLH | 24 hr |
| May 30, 2:25 PM CDT | Frost Advisory | DLH | 17 hr |
| Jun 2, 9:39 AM CDT | Freeze Warning | DLH | 21 hr |
| Jun 5, 3:48 PM CDT | Frost Advisory | DLH | 14 hr |
| Jun 19, 5:11 AM CDT | Dense Fog Advisory | DLH | 6 hr |
| Jun 23, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 23, 7:33 PM CDT | Mesoscale Discussion | SPC | 27 min |
| Jul 14, 10:02 PM CDT | Dense Fog Advisory | DLH | 6 hr |
| Jul 22, 12:42 PM CDT | Special Weather Statement | DLH | 48 min |
| Jul 22, 1:18 PM CDT | Special Weather Statement | DLH | 27 min |
| Jul 22, 1:54 PM CDT | Special Weather Statement | DLH | 66 min |
| Jul 22, 2:37 PM CDT | Special Weather Statement | DLH | 23 min |
| Jul 22, 3:08 PM CDT | Special Weather Statement | DLH | 37 min |
| Jul 27, 12:37 PM CDT | Special Weather Statement | DLH | 53 min |
| Jul 27, 1:23 PM CDT | Special Weather Statement | DLH | 37 min |
| Jul 27, 2:56 PM CDT | Special Weather Statement | DLH | 34 min |
| Jul 30, 6:39 PM CDT | Special Weather Statement | DLH | 36 min |
| Aug 5, 7:16 PM CDT | Special Weather Statement | DLH | 44 min |
| Aug 15, 2:05 AM CDT | Special Weather Statement | DLH | 85 min |
| Aug 15, 2:54 AM CDT | Special Weather Statement | DLH | 51 min |
| Aug 15, 3:17 AM CDT | Severe Thunderstorm Warning | DLH | 23 min |
| Aug 15, 4:10 AM CDT | Special Weather Statement | DLH | 50 min |
| Aug 15, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 17, 7:24 PM CDT | Special Weather Statement | DLH | 36 min |
| Aug 19, 12:45 PM CDT | Special Weather Statement | DLH | 15 min |
| Aug 19, 3:00 PM CDT | Special Weather Statement | DLH | 105 min |
| Aug 19, 8:37 PM CDT | Areal Flood Advisory | DLH | 6 hr |
| Aug 19, 9:28 PM CDT | Wind Advisory | DLH | 5 hr |
| Aug 29, 11:16 AM CDT | Frost Advisory | DLH | 15 hr |
| Aug 30, 11:01 AM CDT | Frost Advisory | DLH | 15 hr |
| Sep 9, 2:00 PM CDT | Special Weather Statement | DLH | 90 min |
| Sep 9, 3:46 PM CDT | Special Weather Statement | DLH | 59 min |
| Sep 9, 11:38 PM CDT | Dense Fog Advisory | DLH | 10 hr |
| Sep 12, 3:28 AM CDT | Dense Fog Advisory | DLH | 6 hr |
| Sep 13, 3:21 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Sep 13, 3:29 PM CDT | Dense Fog Advisory | DLH | 18 hr |
| Sep 27, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 3:40 AM CDT | Freeze Watch | DLH | 24 hr |
| Sep 28, 3:40 AM CDT | Wind Advisory | DLH | 15 hr |
| Sep 29, 3:42 AM CDT | Freeze Warning | DLH | 28 hr |
| Oct 2, 3:05 AM CDT | Wind Advisory | DLH | 18 hr |
| Oct 20, 4:22 AM CDT | Winter Weather Advisory | DLH | 41 hr |
| Oct 30, 3:02 AM CDT | Dense Fog Advisory | DLH | 7 hr |
| Nov 13, 8:40 PM CST | Dense Fog Advisory | DLH | 7 hr |
| Nov 22, 12:41 PM CST | Dense Fog Advisory | DLH | 39 hr |
| Dec 1, 3:35 AM CST | Winter Weather Advisory | DLH | 24 hr |
| Dec 6, 3:46 PM CST | Winter Storm Watch | DLH | 24 hr |
| Dec 7, 3:53 PM CST | Winter Storm Warning | DLH | 60 hr |
| Dec 7, 3:53 PM CST | Winter Weather Advisory | DLH | 48 hr |
| Dec 9, 3:27 PM CST | Wind Chill Advisory | DLH | 19 hr |
| Dec 10, 2:49 PM CST | Wind Chill Advisory | DLH | 18 hr |
| Dec 12, 3:44 PM CST | Wind Chill Advisory | DLH | 18 hr |
| Dec 14, 1:29 PM CST | Wind Chill Advisory | DLH | 20 hr |
| Dec 22, 3:49 AM CST | Winter Storm Watch | DLH | 25 hr |
| Dec 22, 2:46 PM CST | Winter Storm Warning | DLH | 4 days |
| Dec 23, 2:13 PM CST | Blizzard Warning | DLH | 49 hr |
| Dec 25, 3:12 PM CST | Winter Weather Advisory | DLH | 27 hr |
| Dec 27, 8:37 AM CST | Winter Weather Advisory | DLH | 3 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 | 3 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Ice Storm Warning | 2 |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 6 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 2 |
| Freeze Watch | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 11 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
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.