Alert archive / Wisconsin / Bayfield County
Weather alerts in Bayfield County, Wisconsin, 2009
73 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bayfield County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 73
- Warnings
- 17
- Watches
- 11
- Advisories
- 23
- Busiest month
- July13 alerts
- Busiest day
- July 22, 20098 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Bayfield County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 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 7, 7:15 PM CST | Lake Effect Snow Advisory | DLH | 6 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 14, 4:01 AM CST | Wind Chill Warning | DLH | 56 hr |
| Jan 14, 4:01 AM CST | Wind Chill Advisory | DLH | 12 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 1, 3:49 PM CST | Lake Effect Snow Advisory | DLH | 28 hr |
| Feb 2, 6:37 PM CST | Lake Effect Snow Warning | DLH | 17 hr |
| Feb 8, 3:27 PM CST | Freezing Rain Advisory | DLH | 30 hr |
| Feb 17, 3:45 AM CST | Winter Weather Advisory | DLH | 41 hr |
| Feb 25, 3:40 AM CST | Winter Storm Watch | DLH | 12 hr |
| Feb 25, 4:44 AM CST | Winter Weather Advisory | DLH | 4 hr |
| Feb 25, 3:45 PM CST | Winter Weather Advisory | DLH | 42 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 29, 3:48 AM CDT | Winter Storm Watch | DLH | 30 hr |
| Mar 29, 4:01 PM CDT | Winter Storm Warning | DLH | 70 hr |
| Mar 30, 10:07 AM CDT | Winter Weather Advisory | DLH | 48 hr |
| Mar 31, 1:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 23, 9:25 AM CDT | Red Flag Warning | DLH | 10 hr |
| Apr 24, 7:32 PM CDT | Severe Thunderstorm Warning | DLH | 43 min |
| May 5, 3:28 PM CDT | Severe Thunderstorm Warning | DLH | 32 min |
| May 5, 3:55 PM CDT | Severe Thunderstorm Warning | DLH | 50 min |
| May 5, 4:14 PM CDT | Severe Thunderstorm Warning | DLH | 21 min |
| May 29, 3:17 PM CDT | Freeze Watch | DLH | 15 hr |
| May 30, 6:34 AM CDT | Freeze Warning | DLH | 24 hr |
| Jun 2, 9:39 AM CDT | Frost Advisory | DLH | 21 hr |
| Jun 5, 3:48 PM CDT | Frost Advisory | DLH | 14 hr |
| Jun 18, 7:34 PM CDT | Severe Thunderstorm Watch | SPC | 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, 7:07 PM CDT | Special Weather Statement | DLH | 53 min |
| Jul 14, 9:06 PM CDT | Special Weather Statement | DLH | 24 min |
| Jul 14, 10:01 PM CDT | Severe Thunderstorm Warning | DLH | 44 min |
| Jul 21, 6:16 PM CDT | Special Weather Statement | DLH | 59 min |
| Jul 22, 12:51 PM CDT | Special Weather Statement | DLH | 24 min |
| Jul 22, 12:55 PM CDT | Special Weather Statement | DLH | 20 min |
| Jul 22, 1:21 PM CDT | Special Weather Statement | DLH | 39 min |
| Jul 22, 2:35 PM CDT | Special Weather Statement | DLH | 25 min |
| Jul 22, 3:05 PM CDT | Special Weather Statement | DLH | 40 min |
| Jul 22, 3:34 PM CDT | Special Weather Statement | DLH | 41 min |
| Jul 22, 4:03 PM CDT | Areal Flood Advisory | DLH | 3 hr |
| Jul 22, 4:20 PM CDT | Special Weather Statement | DLH | 25 min |
| Jul 30, 4:13 PM CDT | Special Weather Statement | DLH | 47 min |
| Aug 1, 6:45 PM CDT | Special Weather Statement | DLH | 45 min |
| Aug 8, 10:54 PM CDT | Severe Thunderstorm Warning | DLH | 57 min |
| Aug 9, 2:20 AM CDT | Special Weather Statement | DLH | 40 min |
| Aug 9, 2:22 AM CDT | Special Weather Statement | DLH | 38 min |
| Aug 15, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 16, 3:29 AM CDT | Special Weather Statement | DLH | 61 min |
| Aug 16, 4:38 AM CDT | Special Weather Statement | DLH | 52 min |
| Aug 30, 11:01 AM CDT | Frost Advisory | DLH | 15 hr |
| Sep 9, 11:38 PM CDT | Dense Fog Advisory | DLH | 10 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, 8:31 AM CDT | Special Weather Statement | DLH | 44 min |
| Sep 27, 8:32 AM CDT | Special Weather Statement | DLH | 43 min |
| 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 |
| 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 10, 3:26 AM CST | Lake Effect Snow Advisory | DLH | 30 hr |
| Dec 10, 2:49 PM CST | Wind Chill Advisory | DLH | 18 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 27, 2:20 AM CST | Winter Weather Advisory | DLH | 6 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 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.