Alert archive / Nebraska / Box Butte County
Weather alerts in Box Butte County, Nebraska, 2020
111 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Box Butte County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 111
- Warnings
- 31
- Watches
- 11
- Advisories
- 17
- Busiest month
- July28 alerts
- Busiest day
- July 20, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Box Butte County in 2020 had a tornado report inside them.
Box Butte County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 22 | 10 | 55% | 10 | 100% | 30 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 Cheyenne, WY: tornado warnings | 6 | 1 | 83% | 6 | 50% | 14 min |
| NWS Cheyenne, WY: severe thunderstorm warnings | 154 | 76 | 51% | 255 | 75% | 23 min |
| NWS Cheyenne, WY: flash flood warnings | 5 | 2 | 60% | 3 | 67% | 30 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 2, 3:52 AM MST | High Wind Watch | CYS | 47 hr |
| Jan 16, 1:37 PM MST | High Wind Warning | CYS | 55 hr |
| Jan 27, 3:30 AM MST | Freezing Fog Advisory | CYS | 6 hr |
| Feb 2, 2:17 AM MST | Winter Weather Advisory | CYS | 56 hr |
| Feb 15, 2:06 PM MST | Winter Weather Advisory | CYS | 54 hr |
| Mar 12, 2:44 PM MDT | Winter Weather Advisory | CYS | 43 hr |
| Mar 13, 11:38 AM MDT | Winter Storm Warning | CYS | 15 hr |
| Mar 16, 1:57 PM MDT | Winter Storm Watch | CYS | 14 hr |
| Mar 17, 4:20 AM MDT | Blizzard Warning | CYS | 64 hr |
| Mar 17, 4:20 AM MDT | Winter Weather Advisory | CYS | 4 days |
| Mar 17, 11:55 PM MDT | Freezing Fog Advisory | CYS | 12 hr |
| Mar 19, 1:47 AM MDT | Dense Fog Advisory | CYS | 4 hr |
| Mar 19, 4:45 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 26, 12:42 PM MDT | Winter Weather Advisory | CYS | 48 hr |
| Mar 28, 1:15 AM MDT | Winter Storm Warning | CYS | 10 hr |
| Apr 1, 3:15 AM MDT | Winter Weather Advisory | CYS | 41 hr |
| Apr 6, 4:08 AM MDT | Dense Fog Advisory | CYS | 4 hr |
| Apr 10, 2:44 PM MDT | Winter Weather Advisory | CYS | 45 hr |
| Apr 15, 3:02 AM MDT | Winter Weather Advisory | CYS | 39 hr |
| Apr 30, 7:08 PM MDT | Special Weather Statement | CYS | 67 min |
| May 3, 2:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 4:39 PM MDT | Special Weather Statement | CYS | 36 min |
| May 20, 1:07 PM MDT | Mesoscale Discussion | SPC | 83 min |
| May 20, 2:22 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 20, 5:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| May 20, 8:10 PM MDT | Mesoscale Discussion | SPC | 95 min |
| May 23, 12:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 23, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 2:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 23, 5:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 23, 5:29 PM MDT | Special Weather Statement | CYS | 46 min |
| May 29, 6:08 PM MDT | Mesoscale Discussion | SPC | 97 min |
| May 31, 3:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 6:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 4, 2:13 PM MDT | Special Weather Statement | CYS | 47 min |
| Jun 4, 3:21 PM MDT | Special Weather Statement | CYS | 24 min |
| Jun 4, 3:29 PM MDT | Severe Thunderstorm Warning | CYS | 31 min |
| Jun 5, 7:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 6, 1:23 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 6, 2:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 6, 5:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 5:32 PM MDT | Severe Thunderstorm Warning | CYS | 43 min |
| Jun 6, 5:58 PM MDT | Severe Thunderstorm Warning | CYS | 77 min |
| Jun 6, 7:30 PM MDT | Severe Thunderstorm Warning | CYS | 29 min |
| Jun 8, 8:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 25, 5:04 PM MDT | Severe Thunderstorm Warning | CYS | 54 min |
| Jul 2, 4:12 PM MDT | Severe Thunderstorm Warning | CYS | 48 min |
| Jul 2, 4:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 4:59 PM MDT | Severe Thunderstorm Warning | CYS | 61 min |
| Jul 2, 5:14 PM MDT | Tornado Warning | CYS | 46 min |
| Jul 2, 6:08 PM MDT | Severe Thunderstorm Warning | CYS | 52 min |
| Jul 7, 2:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 7, 10:14 PM MDT | Special Weather Statement | CYS | 46 min |
| Jul 8, 4:19 PM MDT | Special Weather Statement | CYS | 41 min |
| Jul 8, 5:36 PM MDT | Severe Thunderstorm Warning | CYS | 39 min |
| Jul 8, 7:21 PM MDT | Special Weather Statement | CYS | 39 min |
| Jul 9, 12:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 9, 7:27 PM MDT | Special Weather Statement | CYS | 48 min |
| Jul 9, 7:37 PM MDT | Severe Thunderstorm Warning | CYS | 53 min |
| Jul 9, 8:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 9, 8:27 PM MDT | Severe Thunderstorm Warning | CYS | 22 min |
| Jul 10, 2:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 2:36 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 19, 2:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 19, 4:06 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 5:55 PM MDT | Severe Thunderstorm Warning | CYS | 29 min |
| Jul 19, 6:32 PM MDT | Severe Thunderstorm Warning | CYS | 58 min |
| Jul 19, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 19, 8:11 PM MDT | Severe Thunderstorm Warning | CYS | 49 min |
| Jul 19, 8:54 PM MDT | Severe Thunderstorm Warning | CYS | 38 min |
| Jul 19, 9:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 19, 9:31 PM MDT | Special Weather Statement | CYS | 44 min |
| Jul 20, 2:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 20, 5:39 PM MDT | Special Weather Statement | CYS | 51 min |
| Aug 4, 5:05 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 5, 1:26 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 5, 3:50 PM MDT | Special Weather Statement | CYS | 40 min |
| Aug 5, 10:16 PM MDT | Special Weather Statement | CYS | 59 min |
| Aug 6, 5:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 1:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 8, 5:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 6:27 PM MDT | Severe Thunderstorm Warning | CYS | 18 min |
| Aug 8, 6:29 PM MDT | Severe Thunderstorm Warning | CYS | 19 min |
| Aug 11, 1:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 11, 3:35 PM MDT | Special Weather Statement | CYS | 40 min |
| Aug 11, 4:12 PM MDT | Special Weather Statement | CYS | 48 min |
| Aug 11, 4:23 PM MDT | Special Weather Statement | CYS | 52 min |
| Aug 12, 4:02 PM MDT | Special Weather Statement | CYS | 73 min |
| Aug 12, 4:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Aug 12, 4:32 PM MDT | Severe Thunderstorm Warning | CYS | 26 min |
| Aug 12, 5:34 PM MDT | Special Weather Statement | CYS | 41 min |
| Aug 12, 5:50 PM MDT | Special Weather Statement | LBF | 40 min |
| Aug 15, 1:42 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 15, 2:06 PM MDT | Severe Thunderstorm Warning | CYS | 39 min |
| Aug 15, 2:41 PM MDT | Severe Thunderstorm Warning | CYS | 34 min |
| Aug 15, 3:16 PM MDT | Severe Thunderstorm Warning | CYS | 44 min |
| Aug 17, 4:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 5:24 PM MDT | Areal Flood Advisory | CYS | 3 hr |
| Aug 17, 5:35 PM MDT | Severe Thunderstorm Warning | CYS | 40 min |
| Aug 17, 6:17 PM MDT | Special Weather Statement | LBF | 28 min |
| Sep 7, 4:09 AM MDT | Winter Weather Advisory | CYS | 46 hr |
| Sep 7, 1:28 PM MDT | Freeze Warning | CYS | 43 hr |
| Sep 8, 8:21 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 23, 2:54 PM MDT | Winter Weather Advisory | CYS | 51 hr |
| Oct 24, 4:22 AM MDT | Winter Storm Warning | CYS | 46 hr |
| Oct 26, 2:34 PM MDT | Wind Chill Advisory | CYS | 18 hr |
| Nov 6, 1:32 PM MST | High Wind Watch | CYS | 14 hr |
| Nov 7, 3:37 AM MST | High Wind Warning | CYS | 31 hr |
| Dec 21, 1:31 PM MST | High Wind Warning | CYS | 4 days |
| Dec 22, 3:39 AM MST | High Wind Watch | CYS | 10 hr |
| Dec 28, 1:17 AM MST | Winter Weather Advisory | CYS | 39 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 | 22 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 7 |
| Mesoscale Discussion | 32 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Freezing Fog Advisory | 2 |
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.