Alert archive / Nebraska / Boone County
Weather alerts in Boone County, Nebraska, 2020
93 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Boone County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 93
- Warnings
- 25
- Watches
- 13
- Advisories
- 28
- Busiest month
- July21 alerts
- Busiest day
- July 1, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Boone County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 4 | 64% | 2 | 100% | 9 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 Omaha, NE: tornado warnings | 7 | 1 | 86% | 3 | 67% | 6 min |
| NWS Omaha, NE: severe thunderstorm warnings | 209 | 126 | 40% | 318 | 84% | 23 min |
| NWS Omaha, NE: flash flood warnings | 15 | 10 | 33% | 22 | 73% | 65 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 5, 3:35 AM CST | Wind Advisory | OAX | 9 hr |
| Jan 16, 3:12 AM CST | Winter Weather Advisory | OAX | 51 hr |
| Jan 17, 6:32 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 17, 2:59 PM CST | High Wind Warning | OAX | 15 hr |
| Jan 18, 2:56 AM CST | Wind Advisory | OAX | 10 hr |
| Jan 22, 3:20 PM CST | Winter Weather Advisory | OAX | 33 hr |
| Feb 8, 3:23 PM CST | Wind Advisory | OAX | 22 hr |
| Feb 12, 4:00 AM CST | Wind Chill Advisory | OAX | 32 hr |
| Feb 14, 3:43 AM CST | Wind Advisory | OAX | 14 hr |
| Feb 18, 3:22 PM CST | Winter Weather Advisory | OAX | 30 hr |
| Mar 4, 1:46 PM CST | Red Flag Warning | OAX | 28 hr |
| Mar 10, 6:42 AM CDT | Dense Fog Advisory | OAX | 3 hr |
| Mar 11, 2:19 AM CDT | Dense Fog Advisory | OAX | 10 hr |
| Mar 12, 4:24 PM CDT | Winter Weather Advisory | OAX | 44 hr |
| Mar 18, 3:39 PM CDT | Winter Weather Advisory | OAX | 38 hr |
| Mar 23, 3:27 AM CDT | Dense Fog Advisory | OAX | 7 hr |
| Mar 24, 6:58 AM CDT | Dense Fog Advisory | OAX | 3 hr |
| Mar 27, 3:10 PM CDT | Wind Advisory | OAX | 33 hr |
| Apr 2, 3:34 AM CDT | Winter Weather Advisory | OAX | 33 hr |
| Apr 7, 1:55 PM CDT | Red Flag Warning | OAX | 5 hr |
| Apr 8, 3:32 PM CDT | Wind Advisory | OAX | 27 hr |
| Apr 9, 3:48 AM CDT | Red Flag Warning | OAX | 15 hr |
| Apr 10, 3:22 PM CDT | Winter Storm Watch | OAX | 24 hr |
| Apr 11, 3:08 PM CDT | Winter Storm Warning | OAX | 28 hr |
| Apr 15, 3:55 PM CDT | Winter Weather Advisory | OAX | 36 hr |
| Apr 20, 3:51 AM CDT | Red Flag Warning | OAX | 15 hr |
| Apr 28, 4:09 PM CDT | Special Weather Statement | OAX | 36 min |
| Apr 28, 5:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 28, 6:17 PM CDT | Special Weather Statement | OAX | 28 min |
| Apr 28, 8:04 PM CDT | Special Weather Statement | OAX | 11 min |
| Apr 28, 8:23 PM CDT | Special Weather Statement | OAX | 37 min |
| May 9, 2:55 AM CDT | Freeze Warning | OAX | 30 hr |
| May 9, 9:04 PM CDT | Special Weather Statement | OAX | 86 min |
| May 10, 2:49 AM CDT | Freeze Warning | OAX | 28 hr |
| May 23, 11:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 24, 1:20 AM CDT | Mesoscale Discussion | SPC | 55 min |
| May 24, 1:56 AM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| May 24, 2:37 AM CDT | Severe Thunderstorm Warning | OAX | 38 min |
| May 24, 4:00 AM CDT | Flash Flood Watch | OAX | 39 hr |
| Jun 2, 4:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 4, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 4, 9:32 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Jun 4, 9:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 8, 3:37 PM CDT | High Wind Watch | OAX | 12 hr |
| Jun 9, 3:22 AM CDT | High Wind Warning | OAX | 25 hr |
| Jun 21, 2:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 21, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 6:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 12:31 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 9:00 PM CDT | Severe Thunderstorm Warning | OAX | 30 min |
| Jun 30, 9:19 PM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Jun 30, 9:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 9:56 PM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Jun 30, 10:26 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Jul 1, 1:32 AM CDT | Special Weather Statement | OAX | 28 min |
| Jul 6, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 6, 8:12 PM CDT | Severe Thunderstorm Warning | OAX | 45 min |
| Jul 6, 8:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 6, 8:51 PM CDT | Special Weather Statement | OAX | 24 min |
| Jul 7, 12:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 3:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 8, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 10:06 PM CDT | Special Weather Statement | OAX | 24 min |
| Jul 8, 10:24 PM CDT | Severe Thunderstorm Warning | OAX | 51 min |
| Jul 10, 2:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 10, 11:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 2:43 AM CDT | Dense Fog Advisory | OAX | 5 hr |
| Jul 17, 3:30 AM CDT | Heat Advisory | OAX | 41 hr |
| Jul 20, 2:14 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 3:02 PM CDT | Heat Advisory | OAX | 29 hr |
| Aug 16, 9:40 AM CDT | Severe Thunderstorm Warning | OAX | 25 min |
| Aug 16, 1:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 16, 3:48 PM CDT | Severe Thunderstorm Warning | OAX | 42 min |
| Aug 30, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 30, 8:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 12:20 AM CDT | Special Weather Statement | OAX | 40 min |
| Oct 1, 3:33 AM CDT | Frost Advisory | OAX | 28 hr |
| Oct 11, 3:05 PM CDT | Wind Advisory | OAX | 10 hr |
| Oct 13, 3:15 PM CDT | Fire Weather Watch | OAX | 13 hr |
| Oct 13, 3:15 PM CDT | Red Flag Warning | OAX | 28 hr |
| Oct 15, 3:36 AM CDT | Freeze Warning | OAX | 30 hr |
| Oct 23, 3:53 PM CDT | Winter Weather Advisory | OAX | 69 hr |
| Nov 5, 2:19 PM CST | Red Flag Warning | OAX | 28 hr |
| Nov 7, 2:39 PM CST | Wind Advisory | OAX | 27 hr |
| Nov 9, 3:15 PM CST | Winter Weather Advisory | OAX | 24 hr |
| Nov 10, 9:42 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 22, 1:02 PM CST | Winter Weather Advisory | OAX | 10 hr |
| Dec 22, 10:51 PM CST | Blizzard Warning | OAX | 19 hr |
| Dec 27, 3:05 PM CST | Winter Storm Watch | OAX | 12 hr |
| Dec 28, 3:34 AM CST | Winter Weather Advisory | OAX | 44 hr |
| Dec 28, 3:43 PM CST | Winter Storm Warning | OAX | 27 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 | 11 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 6 |
| 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 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.