Alert archive / Minnesota / Olmsted County
Weather alerts in Olmsted County, Minnesota, 2018
139 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Olmsted County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 139
- Warnings
- 30
- Watches
- 21
- Advisories
- 40
- Busiest month
- September24 alerts
- Busiest day
- September 4, 20188 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Olmsted County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 12 | 58% | 19 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 11 | 0 | 100% | 4 | 0% | |
| NWS La Crosse, WI: severe thunderstorm warnings | 115 | 62 | 46% | 187 | 67% | 24 min |
| NWS La Crosse, WI: flash flood warnings | 28 | 18 | 36% | 53 | 81% | 100 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, 12:11 PM CST | Wind Chill Advisory | ARX | 23 hr |
| Jan 3, 2:07 PM CST | Wind Chill Advisory | ARX | 17 hr |
| Jan 9, 3:25 PM CST | Winter Storm Watch | ARX | 23 hr |
| Jan 10, 3:05 AM CST | Dense Fog Advisory | ARX | 8 hr |
| Jan 10, 2:07 PM CST | Winter Storm Warning | ARX | 14 hr |
| Jan 10, 2:07 PM CST | Winter Weather Advisory | ARX | 28 hr |
| Jan 11, 2:59 PM CST | Wind Chill Advisory | ARX | 19 hr |
| Jan 12, 3:00 PM CST | Wind Chill Advisory | ARX | 18 hr |
| Jan 14, 3:51 AM CST | Wind Chill Advisory | ARX | 54 hr |
| Jan 14, 3:51 AM CST | Winter Weather Advisory | ARX | 44 hr |
| Jan 19, 3:01 PM CST | Winter Storm Watch | ARX | 37 hr |
| Jan 21, 3:56 AM CST | Winter Storm Warning | ARX | 44 hr |
| Jan 22, 9:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 1, 3:02 AM CST | Wind Chill Advisory | ARX | 9 hr |
| Feb 1, 2:15 PM CST | Wind Chill Advisory | ARX | 20 hr |
| Feb 18, 3:30 AM CST | Wind Advisory | ARX | 12 hr |
| Feb 18, 3:48 AM CST | Winter Weather Advisory | ARX | 58 hr |
| Feb 19, 1:32 AM CST | Winter Weather Advisory | ARX | 36 hr |
| Feb 20, 2:43 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 22, 3:04 AM CST | Winter Weather Advisory | ARX | 30 hr |
| Feb 22, 3:17 PM CST | Winter Storm Watch | ARX | 23 hr |
| Feb 23, 2:38 PM CST | Winter Weather Advisory | ARX | 36 hr |
| Feb 24, 1:24 AM CST | Dense Fog Advisory | ARX | 8 hr |
| Mar 3, 2:18 PM CST | Winter Storm Watch | ARX | 25 hr |
| Mar 4, 3:15 PM CST | Winter Storm Warning | ARX | 36 hr |
| Mar 5, 1:17 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 22, 3:23 AM CDT | Winter Storm Watch | ARX | 24 hr |
| Mar 23, 3:50 AM CDT | Winter Weather Advisory | ARX | 24 hr |
| Mar 30, 2:42 PM CDT | Wind Advisory | ARX | 22 hr |
| Apr 1, 2:53 PM CDT | Winter Storm Watch | ARX | 20 hr |
| Apr 2, 11:09 AM CDT | Winter Storm Warning | ARX | 41 hr |
| Apr 7, 2:21 PM CDT | Winter Weather Advisory | ARX | 41 hr |
| Apr 12, 3:37 PM CDT | Winter Storm Watch | ARX | 24 hr |
| Apr 13, 8:44 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 13, 4:04 PM CDT | Winter Storm Warning | ARX | 54 hr |
| Apr 13, 4:04 PM CDT | Winter Weather Advisory | ARX | 51 hr |
| Apr 13, 6:56 PM CDT | Special Weather Statement | ARX | 64 min |
| Apr 14, 6:02 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 16, 3:11 AM CDT | Winter Storm Watch | ARX | 36 hr |
| Apr 17, 3:35 AM CDT | Winter Storm Warning | ARX | 44 hr |
| Apr 17, 3:19 PM CDT | Winter Weather Advisory | ARX | 30 hr |
| Apr 28, 3:08 PM CDT | Fire Weather Watch | ARX | 12 hr |
| Apr 29, 3:37 AM CDT | Red Flag Warning | ARX | 17 hr |
| Apr 30, 3:35 PM CDT | Wind Advisory | ARX | 4 hr |
| May 1, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 1, 7:21 PM CDT | Special Weather Statement | ARX | 54 min |
| May 1, 7:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 5, 7:31 PM CDT | Special Weather Statement | ARX | 89 min |
| May 5, 8:21 PM CDT | Special Weather Statement | ARX | 114 min |
| May 15, 2:02 AM CDT | Dense Fog Advisory | ARX | 7 hr |
| May 25, 12:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 2:02 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 25, 2:40 PM CDT | Severe Thunderstorm Warning | ARX | 20 min |
| May 25, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 25, 6:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 8:15 PM CDT | Severe Thunderstorm Warning | ARX | 45 min |
| May 25, 8:53 PM CDT | Severe Thunderstorm Warning | ARX | 41 min |
| May 28, 7:26 PM CDT | Severe Thunderstorm Warning | ARX | 35 min |
| May 29, 1:31 PM CDT | Special Weather Statement | ARX | 74 min |
| May 29, 1:32 PM CDT | Severe Thunderstorm Warning | ARX | 43 min |
| May 29, 2:12 PM CDT | Severe Thunderstorm Warning | ARX | 48 min |
| May 29, 2:55 PM CDT | Severe Thunderstorm Warning | ARX | 35 min |
| May 29, 3:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 9, 11:38 AM CDT | Special Weather Statement | ARX | 67 min |
| Jun 9, 3:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 15, 2:10 PM CDT | Heat Advisory | ARX | 53 hr |
| Jun 15, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 6:26 PM CDT | Special Weather Statement | ARX | 49 min |
| Jun 26, 7:52 PM CDT | Areal Flood Advisory | ARX | 3 hr |
| Jun 28, 3:13 AM CDT | Excessive Heat Warning | ARX | 64 hr |
| Jun 28, 3:13 AM CDT | Heat Advisory | ARX | 64 hr |
| Jun 30, 12:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 6:35 PM CDT | Severe Thunderstorm Warning | ARX | 40 min |
| Jun 30, 7:15 PM CDT | Severe Thunderstorm Warning | ARX | 30 min |
| Jun 30, 9:23 PM CDT | River Flood Warning | ARX | 22 hr |
| Jul 3, 3:08 PM CDT | Heat Advisory | ARX | 27 hr |
| Jul 4, 9:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 1:32 PM CDT | Special Weather Statement | ARX | 88 min |
| Jul 4, 2:55 PM CDT | Special Weather Statement | ARX | 80 min |
| Jul 4, 3:04 PM CDT | Severe Thunderstorm Warning | ARX | 35 min |
| Jul 11, 3:42 PM CDT | Heat Advisory | ARX | 28 hr |
| Jul 12, 4:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 12, 5:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 6:41 PM CDT | Special Weather Statement | ARX | 109 min |
| Jul 12, 7:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 12, 9:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 13, 2:04 AM CDT | Special Weather Statement | ARX | 86 min |
| Jul 14, 3:16 AM CDT | Dense Fog Advisory | ARX | 5 hr |
| Jul 25, 3:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 4:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 25, 6:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 8, 1:03 AM CDT | Dense Fog Advisory | ARX | 8 hr |
| Aug 24, 3:18 AM CDT | Special Weather Statement | ARX | 42 min |
| Aug 27, 2:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 27, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 4:57 PM CDT | Severe Thunderstorm Warning | ARX | 78 min |
| Aug 27, 5:28 PM CDT | Severe Thunderstorm Warning | ARX | 77 min |
| Aug 31, 9:32 AM CDT | Special Weather Statement | ARX | 58 min |
| Sep 4, 4:00 AM CDT | Flash Flood Watch | ARX | 33 hr |
| Sep 4, 2:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 3:01 PM CDT | Special Weather Statement | ARX | 89 min |
| Sep 4, 3:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 4, 4:47 PM CDT | Severe Thunderstorm Warning | ARX | 30 min |
| Sep 4, 6:19 PM CDT | Special Weather Statement | ARX | 86 min |
| Sep 4, 6:22 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Sep 4, 6:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 9:16 PM CDT | Areal Flood Warning | ARX | 3 hr |
| Sep 4, 9:56 PM CDT | River Flood Warning | ARX | 42 hr |
| Sep 17, 2:11 PM CDT | Special Weather Statement | ARX | 64 min |
| Sep 17, 3:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 17, 3:19 PM CDT | Special Weather Statement | ARX | 71 min |
| Sep 17, 5:27 PM CDT | Special Weather Statement | ARX | 63 min |
| Sep 19, 4:10 AM CDT | Flash Flood Watch | ARX | 32 hr |
| Sep 20, 2:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 20, 5:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 20, 5:59 PM CDT | Special Weather Statement | ARX | 61 min |
| Sep 20, 6:23 PM CDT | Tornado Watch | SPC | 5 hr |
| Sep 20, 6:38 PM CDT | Severe Thunderstorm Warning | ARX | 52 min |
| Sep 20, 6:56 PM CDT | Special Weather Statement | ARX | 94 min |
| Sep 20, 7:04 PM CDT | Severe Thunderstorm Warning | ARX | 56 min |
| Sep 20, 8:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 28, 3:40 AM CDT | Freeze Warning | ARX | 29 hr |
| Oct 3, 12:01 PM CDT | Wind Advisory | ARX | 13 hr |
| Oct 3, 5:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 8, 3:13 AM CDT | Flood Watch | ARX | 56 hr |
| Oct 11, 2:39 AM CDT | Freeze Warning | ARX | 30 hr |
| Oct 19, 7:30 PM CDT | Wind Advisory | ARX | 19 hr |
| Oct 27, 2:46 PM CDT | Wind Advisory | ARX | 22 hr |
| Nov 16, 2:45 AM CST | Winter Weather Advisory | ARX | 27 hr |
| Nov 29, 4:04 AM CST | Winter Storm Watch | ARX | 35 hr |
| Nov 30, 2:40 PM CST | Winter Weather Advisory | ARX | 45 hr |
| Dec 1, 3:48 AM CST | Winter Storm Warning | ARX | 32 hr |
| Dec 10, 4:15 AM CST | Dense Fog Advisory | ARX | 6 hr |
| Dec 12, 8:48 PM CST | Dense Fog Advisory | ARX | 13 hr |
| Dec 14, 1:04 AM CST | Dense Fog Advisory | ARX | 11 hr |
| Dec 28, 2:34 AM CST | Winter Weather Advisory | ARX | 9 hr |
| Dec 30, 2:48 PM CST | Winter Weather Advisory | ARX | 33 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 | 15 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| River Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 9 |
| Winter Weather Advisory | 14 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Advisory | 7 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.