Alert archive / Nebraska / Sherman County
Weather alerts in Sherman County, Nebraska, 2015
132 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 132
- Warnings
- 32
- Watches
- 22
- Advisories
- 23
- Busiest month
- June27 alerts
- Busiest day
- September 9, 20159 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sherman County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 19 | 13 | 32% | 7 | 100% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Hastings, NE: tornado warnings | 38 | 14 | 63% | 25 | 76% | 14 min |
| NWS Hastings, NE: severe thunderstorm warnings | 285 | 138 | 52% | 329 | 79% | 19 min |
| NWS Hastings, NE: flash flood warnings | 7 | 3 | 57% | 3 | 100% | 29 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 3, 4:03 AM CST | Wind Chill Advisory | GID | 32 hr |
| Jan 3, 12:07 PM CST | Winter Weather Advisory | GID | 13 hr |
| Jan 6, 2:03 PM CST | Wind Chill Advisory | GID | 22 hr |
| Jan 31, 4:10 AM CST | Winter Weather Advisory | GID | 38 hr |
| Feb 1, 6:47 PM CST | Wind Chill Advisory | GID | 15 hr |
| Feb 3, 3:42 AM CST | Winter Weather Advisory | GID | 32 hr |
| Feb 4, 4:24 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 4, 6:49 AM CST | Winter Storm Warning | GID | 5 hr |
| Feb 9, 3:56 AM CST | Dense Fog Advisory | GID | 9 hr |
| Feb 9, 6:23 PM CST | Dense Fog Advisory | GID | 10 hr |
| Feb 17, 8:59 AM CST | Winter Weather Advisory | GID | 4 hr |
| Mar 11, 3:25 PM CDT | Red Flag Warning | GID | 28 hr |
| Mar 14, 3:44 AM CDT | Fire Weather Watch | GID | 11 hr |
| Mar 14, 2:57 PM CDT | Red Flag Warning | GID | 29 hr |
| Mar 19, 3:36 PM CDT | Fire Weather Watch | GID | 11 hr |
| Mar 20, 3:03 AM CDT | Red Flag Warning | GID | 17 hr |
| Mar 25, 12:14 AM CDT | Dense Fog Advisory | GID | 7 hr |
| Mar 28, 3:19 PM CDT | Fire Weather Watch | GID | 14 hr |
| Mar 29, 4:53 AM CDT | Red Flag Warning | GID | 14 hr |
| Mar 30, 4:06 AM CDT | Red Flag Warning | GID | 15 hr |
| Apr 1, 3:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 1, 6:15 PM CDT | Severe Thunderstorm Warning | GID | 30 min |
| Apr 1, 6:45 PM CDT | Severe Thunderstorm Warning | GID | 32 min |
| Apr 1, 6:59 PM CDT | Areal Flood Advisory | GID | 3 hr |
| Apr 3, 2:30 AM CDT | Fire Weather Watch | GID | 13 hr |
| Apr 3, 3:09 PM CDT | Red Flag Warning | GID | 30 hr |
| Apr 12, 5:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 13, 3:00 PM CDT | Red Flag Warning | GID | 29 hr |
| Apr 18, 6:27 PM CDT | Severe Thunderstorm Warning | GID | 33 min |
| Apr 24, 10:09 PM CDT | Special Weather Statement | GID | 51 min |
| May 2, 6:45 PM CDT | Special Weather Statement | GID | 30 min |
| May 2, 7:14 PM CDT | Special Weather Statement | GID | 31 min |
| May 6, 1:41 PM CDT | Tornado Watch | SPC | 7 hr |
| May 11, 3:38 AM CDT | Frost Advisory | GID | 29 hr |
| May 16, 12:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 16, 6:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 2, 9:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 11:57 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 12:07 AM CDT | Special Weather Statement | GID | 38 min |
| Jun 3, 12:39 AM CDT | Severe Thunderstorm Warning | GID | 51 min |
| Jun 3, 1:03 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 3, 3:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 4, 1:46 AM CDT | Special Weather Statement | GID | 44 min |
| Jun 4, 1:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 4, 12:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 4, 1:00 PM CDT | Severe Thunderstorm Warning | GID | 45 min |
| Jun 5, 2:31 AM CDT | Special Weather Statement | GID | 29 min |
| Jun 6, 2:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 6, 3:40 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 6, 6:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 10, 2:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 10, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 10, 5:58 PM CDT | Special Weather Statement | GID | 47 min |
| Jun 10, 6:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 6:25 PM CDT | Severe Thunderstorm Warning | GID | 50 min |
| Jun 10, 8:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 14, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 16, 11:23 PM CDT | Mesoscale Discussion | SPC | 37 min |
| Jun 18, 3:49 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 18, 5:21 AM CDT | Special Weather Statement | GID | 39 min |
| Jun 18, 6:07 AM CDT | Special Weather Statement | GID | 38 min |
| Jun 24, 12:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 24, 2:25 AM CDT | Special Weather Statement | GID | 35 min |
| Jul 10, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 11, 2:53 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 11, 6:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 12, 4:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 14, 3:36 PM CDT | Severe Thunderstorm Warning | GID | 24 min |
| Jul 14, 3:59 PM CDT | Severe Thunderstorm Warning | GID | 31 min |
| Jul 14, 4:02 PM CDT | Special Weather Statement | GID | 13 min |
| Jul 14, 4:17 PM CDT | Areal Flood Advisory | GID | 6 hr |
| Jul 14, 4:20 PM CDT | Severe Thunderstorm Warning | GID | 21 min |
| Jul 17, 4:03 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 8:57 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 9:17 PM CDT | Severe Thunderstorm Warning | GID | 43 min |
| Jul 17, 9:58 PM CDT | Severe Thunderstorm Warning | GID | 31 min |
| Jul 17, 10:54 PM CDT | Special Weather Statement | GID | 36 min |
| Jul 23, 3:04 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 23, 6:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 8:44 PM CDT | Special Weather Statement | GID | 46 min |
| Jul 24, 9:00 PM CDT | Severe Thunderstorm Warning | GID | 45 min |
| Jul 31, 2:45 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 1, 4:27 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 2, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 2, 5:17 PM CDT | Special Weather Statement | GID | 43 min |
| Aug 2, 5:29 PM CDT | Severe Thunderstorm Warning | GID | 29 min |
| Aug 7, 3:45 AM CDT | Flash Flood Watch | GID | 25 hr |
| Aug 16, 4:27 AM CDT | Flash Flood Watch | GID | 5 hr |
| Aug 16, 9:19 AM CDT | Flash Flood Watch | GID | 13 hr |
| Aug 16, 2:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 4:59 PM CDT | Special Weather Statement | GID | 31 min |
| Aug 27, 3:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 5:41 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 27, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Aug 30, 3:47 AM CDT | Dense Fog Advisory | GID | 6 hr |
| Sep 9, 12:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 9, 2:27 PM CDT | Special Weather Statement | GID | 33 min |
| Sep 9, 2:54 PM CDT | Special Weather Statement | GID | 36 min |
| Sep 9, 5:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 9, 5:58 PM CDT | Severe Thunderstorm Warning | GID | 47 min |
| Sep 9, 6:16 PM CDT | Severe Thunderstorm Warning | GID | 29 min |
| Sep 9, 6:26 PM CDT | Severe Thunderstorm Warning | GID | 34 min |
| Sep 9, 6:45 PM CDT | Severe Thunderstorm Warning | GID | 30 min |
| Sep 9, 6:57 PM CDT | Severe Thunderstorm Warning | GID | 33 min |
| Sep 9, 7:07 PM CDT | Areal Flood Advisory | GID | 6 hr |
| Sep 9, 10:41 PM CDT | Areal Flood Advisory | GID | 12 hr |
| Sep 10, 2:04 PM CDT | Special Weather Statement | GID | 26 min |
| Sep 10, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 10, 5:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Sep 15, 6:16 PM CDT | Special Weather Statement | GID | 44 min |
| Sep 18, 9:15 AM CDT | Severe Thunderstorm Warning | GID | 45 min |
| Oct 10, 3:19 AM CDT | Fire Weather Watch | GID | 24 hr |
| Oct 11, 3:26 AM CDT | Red Flag Warning | GID | 16 hr |
| Oct 11, 7:24 PM CDT | Special Weather Statement | GID | 81 min |
| Oct 11, 7:50 PM CDT | Special Weather Statement | GID | 40 min |
| Oct 12, 3:16 AM CDT | Red Flag Warning | GID | 15 hr |
| Oct 13, 3:21 AM CDT | Red Flag Warning | GID | 15 hr |
| Oct 14, 2:51 PM CDT | Freeze Watch | GID | 13 hr |
| Oct 15, 3:32 AM CDT | Freeze Warning | GID | 29 hr |
| Nov 9, 3:33 PM CST | High Wind Watch | GID | 23 hr |
| Nov 10, 2:17 PM CST | High Wind Warning | GID | 28 hr |
| Nov 10, 2:37 PM CST | Winter Storm Watch | GID | 13 hr |
| Nov 11, 3:43 AM CST | Winter Weather Advisory | GID | 14 hr |
| Nov 16, 6:50 PM CST | Mesoscale Discussion | SPC | 85 min |
| Nov 17, 4:07 AM CST | Winter Weather Advisory | GID | 26 hr |
| Nov 24, 3:53 PM CST | Winter Weather Advisory | GID | 56 hr |
| Nov 25, 5:34 AM CST | Dense Fog Advisory | GID | 5 hr |
| Nov 28, 3:13 PM CST | Winter Storm Watch | GID | 13 hr |
| Nov 28, 3:13 PM CST | Winter Weather Advisory | GID | 46 hr |
| Dec 12, 4:13 AM CST | Winter Storm Watch | GID | 24 hr |
| Dec 15, 3:22 PM CST | Dense Fog Advisory | GID | 7 hr |
| Dec 25, 3:52 PM CST | Winter Weather Advisory | GID | 20 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 | 19 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 34 |
| Special Weather Statement | 21 |
| Flooding | |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 10 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.