Alert archive / Nebraska / Sherman County
Weather alerts in Sherman County, Nebraska, 2018
116 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sherman County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 116
- Warnings
- 30
- Watches
- 21
- Advisories
- 27
- Busiest month
- June29 alerts
- Busiest day
- June 2, 20189 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Sherman County in 2018 had a tornado report inside them.
Sherman County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 11 | 35% | 10 | 100% | 32 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Hastings, NE: tornado warnings | 29 | 7 | 76% | 13 | 69% | 15 min |
| NWS Hastings, NE: severe thunderstorm warnings | 240 | 113 | 53% | 337 | 84% | 23 min |
| NWS Hastings, NE: flash flood warnings | 9 | 1 | 89% | 1 | 100% | 34 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 9, 3:09 AM CST | Winter Storm Watch | GID | 24 hr |
| Jan 9, 3:30 PM CST | Winter Weather Advisory | GID | 43 hr |
| Jan 14, 2:37 PM CST | Wind Chill Advisory | GID | 45 hr |
| Jan 19, 3:37 AM CST | Winter Storm Watch | GID | 35 hr |
| Jan 20, 4:02 AM CST | Winter Storm Warning | GID | 24 hr |
| Jan 20, 2:52 PM CST | Winter Weather Advisory | GID | 51 hr |
| Jan 21, 3:52 AM CST | Blizzard Warning | GID | 38 hr |
| Jan 22, 2:02 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 5, 7:29 AM CST | Winter Weather Advisory | GID | 6 hr |
| Feb 9, 2:39 PM CST | Winter Weather Advisory | GID | 12 hr |
| Feb 10, 5:25 AM CST | Wind Chill Advisory | GID | 5 hr |
| Feb 18, 3:31 AM CST | Winter Weather Advisory | GID | 29 hr |
| Feb 21, 2:51 PM CST | Winter Weather Advisory | GID | 33 hr |
| Feb 22, 2:23 PM CST | Winter Storm Watch | GID | 13 hr |
| Feb 23, 3:50 AM CST | Winter Weather Advisory | GID | 36 hr |
| Mar 3, 3:16 PM CST | High Wind Watch | GID | 24 hr |
| Mar 4, 3:28 PM CST | High Wind Watch | GID | 34 hr |
| Mar 4, 3:28 PM CST | High Wind Warning | GID | 29 hr |
| Mar 5, 1:41 PM CST | High Wind Warning | GID | 25 hr |
| Mar 21, 4:25 AM CDT | Dense Fog Advisory | GID | 8 hr |
| Mar 30, 3:25 PM CDT | Winter Weather Advisory | GID | 46 hr |
| Mar 31, 3:31 AM CDT | Winter Storm Warning | GID | 24 hr |
| Apr 4, 3:26 PM CDT | Winter Weather Advisory | GID | 49 hr |
| Apr 10, 3:56 AM CDT | Fire Weather Watch | GID | 25 hr |
| Apr 11, 4:50 AM CDT | Red Flag Warning | GID | 15 hr |
| Apr 11, 3:18 PM CDT | Winter Storm Watch | GID | 37 hr |
| Apr 12, 11:54 AM CDT | Blizzard Warning | GID | 55 hr |
| Apr 13, 4:14 AM CDT | Winter Weather Advisory | GID | 42 hr |
| Apr 30, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 30, 8:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 3, 11:58 AM CDT | Special Weather Statement | GID | 47 min |
| May 3, 12:43 PM CDT | Special Weather Statement | GID | 47 min |
| May 5, 7:02 PM CDT | Special Weather Statement | GID | 43 min |
| May 10, 7:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 7:59 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 10, 10:57 PM CDT | Severe Thunderstorm Warning | GID | 63 min |
| May 10, 11:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 10, 11:44 PM CDT | Severe Thunderstorm Warning | GID | 61 min |
| May 11, 12:06 AM CDT | Severe Thunderstorm Warning | GID | 39 min |
| May 18, 9:14 AM CDT | Special Weather Statement | GID | 61 min |
| May 18, 10:09 AM CDT | Special Weather Statement | GID | 51 min |
| May 18, 2:25 PM CDT | Flood Watch | GID | 25 hr |
| May 21, 12:56 AM CDT | Dense Fog Advisory | GID | 9 hr |
| Jun 1, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 3:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 7:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 9:04 PM CDT | Severe Thunderstorm Warning | GID | 41 min |
| Jun 1, 9:24 PM CDT | Severe Thunderstorm Warning | GID | 51 min |
| Jun 1, 9:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 1, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 1, 10:14 PM CDT | Severe Thunderstorm Warning | GID | 46 min |
| Jun 1, 10:18 PM CDT | Severe Thunderstorm Warning | GID | 42 min |
| Jun 1, 10:24 PM CDT | Tornado Warning | GID | 36 min |
| Jun 1, 11:00 PM CDT | Severe Thunderstorm Warning | GID | 45 min |
| Jun 6, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 6, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 7, 1:00 AM CDT | Special Weather Statement | GID | 60 min |
| Jun 8, 11:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 12:37 AM CDT | Severe Thunderstorm Warning | GID | 23 min |
| Jun 9, 1:00 AM CDT | Severe Thunderstorm Warning | GID | 30 min |
| Jun 9, 1:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 1:41 AM CDT | Special Weather Statement | GID | 34 min |
| Jun 18, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 19, 3:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 6:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 9:01 PM CDT | Special Weather Statement | LBF | 29 min |
| Jun 23, 9:46 PM CDT | Special Weather Statement | GID | 29 min |
| Jun 27, 2:30 PM CDT | Heat Advisory | GID | 54 hr |
| Jun 30, 3:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 30, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 30, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 8:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 9:40 PM CDT | Severe Thunderstorm Warning | GID | 50 min |
| Jul 2, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 8:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 14, 4:33 AM CDT | Dense Fog Advisory | GID | 5 hr |
| Jul 18, 4:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 18, 6:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 7:51 PM CDT | Severe Thunderstorm Warning | GID | 39 min |
| Jul 18, 8:04 PM CDT | Special Weather Statement | LBF | 41 min |
| Jul 18, 8:21 PM CDT | Severe Thunderstorm Warning | GID | 39 min |
| Jul 18, 8:58 PM CDT | Severe Thunderstorm Warning | GID | 17 min |
| Jul 18, 9:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 18, 9:32 PM CDT | Severe Thunderstorm Warning | GID | 43 min |
| Jul 23, 12:37 AM CDT | Special Weather Statement | LBF | 23 min |
| Jul 23, 12:39 AM CDT | Special Weather Statement | GID | 51 min |
| Jul 23, 1:02 AM CDT | Special Weather Statement | LBF | 43 min |
| Jul 25, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 28, 9:24 PM CDT | Severe Thunderstorm Warning | GID | 36 min |
| Aug 6, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 8, 5:43 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 15, 2:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 3:50 AM CDT | Severe Thunderstorm Warning | GID | 25 min |
| Aug 30, 8:26 AM CDT | Dense Fog Advisory | GID | 3 hr |
| Sep 19, 5:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 25, 2:06 PM CDT | Frost Advisory | GID | 19 hr |
| Oct 5, 2:49 PM CDT | Frost Advisory | GID | 19 hr |
| Oct 9, 2:21 PM CDT | Freeze Watch | GID | 14 hr |
| Oct 10, 4:20 AM CDT | Freeze Warning | GID | 30 hr |
| Nov 6, 2:23 PM CST | Winter Weather Advisory | GID | 52 hr |
| Nov 23, 3:30 AM CST | Winter Storm Watch | GID | 10 hr |
| Nov 23, 1:39 PM CST | Winter Weather Advisory | GID | 49 hr |
| Nov 29, 4:04 AM CST | Winter Storm Watch | GID | 10 hr |
| Nov 29, 2:09 PM CST | Winter Storm Warning | GID | 61 hr |
| Nov 29, 2:09 PM CST | Winter Weather Advisory | GID | 3 days |
| Nov 29, 9:12 PM CST | Dense Fog Advisory | GID | 14 hr |
| Dec 1, 2:17 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 8, 5:46 AM CST | Dense Fog Advisory | GID | 4 hr |
| Dec 24, 2:23 PM CST | Winter Storm Watch | GID | 37 hr |
| Dec 25, 5:53 PM CST | Dense Fog Advisory | GID | 10 hr |
| Dec 26, 3:43 AM CST | Winter Weather Advisory | GID | 24 hr |
| Dec 26, 2:32 PM CST | Winter Storm Warning | GID | 27 hr |
| Dec 27, 3:57 AM CST | Blizzard Warning | GID | 8 hr |
| Dec 27, 3:57 AM CST | Winter Storm Warning | GID | 14 hr |
| Dec 31, 3:06 PM CST | Areal Flood Advisory | GID | 3 days |
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 | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 25 |
| Special Weather Statement | 13 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 14 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
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.