Alert archive / Nebraska / Sheridan County
Weather alerts in Sheridan County, Nebraska, 2011
164 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sheridan County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 164
- Warnings
- 48
- Watches
- 37
- Advisories
- 37
- Busiest month
- June35 alerts
- Busiest day
- June 26, 20118 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 Sheridan County in 2011 had a tornado report inside them.
Sheridan County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 31 | 20 | 35% | 34 | 91% | 19 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 236 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS North Platte, NE: tornado warnings | 58 | 11 | 81% | 29 | 52% | 12 min |
| NWS North Platte, NE: severe thunderstorm warnings | 334 | 199 | 40% | 433 | 84% | 21 min |
| NWS North Platte, NE: flash flood warnings | 17 | 8 | 53% | 15 | 60% | 119 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 8, 2:46 AM MST | Winter Weather Advisory | LBF | 66 hr |
| Jan 10, 11:26 AM MST | Wind Chill Advisory | LBF | 24 hr |
| Jan 18, 11:57 AM MST | Winter Weather Advisory | LBF | 32 hr |
| Jan 20, 2:16 AM MST | Wind Chill Advisory | LBF | 7 hr |
| Jan 30, 2:28 PM MST | Winter Weather Advisory | LBF | 25 hr |
| Jan 31, 2:31 AM MST | Wind Chill Warning | LBF | 56 hr |
| Jan 31, 2:31 AM MST | Wind Chill Advisory | LBF | 13 hr |
| Feb 2, 2:22 PM MST | Wind Chill Advisory | LBF | 19 hr |
| Feb 7, 2:52 AM MST | Winter Weather Advisory | LBF | 36 hr |
| Feb 7, 3:23 PM MST | Wind Chill Advisory | LBF | 20 hr |
| Feb 8, 12:26 PM MST | Wind Chill Advisory | LBF | 22 hr |
| Feb 13, 2:46 AM MST | Wind Advisory | LBF | 14 hr |
| Feb 17, 2:49 AM MST | Wind Advisory | LBF | 14 hr |
| Feb 17, 11:46 AM MST | Red Flag Warning | LBF | 5 hr |
| Feb 18, 11:55 AM MST | Winter Storm Watch | LBF | 27 hr |
| Feb 19, 2:38 PM MST | Winter Storm Warning | LBF | 24 hr |
| Feb 24, 4:47 AM MST | Winter Weather Advisory | LBF | 26 hr |
| Mar 5, 10:15 PM MST | Winter Weather Advisory | LBF | 41 hr |
| Mar 11, 3:05 AM MST | Wind Advisory | LBF | 11 hr |
| Mar 17, 2:44 PM MDT | Winter Weather Advisory | LBF | 12 hr |
| Mar 19, 1:51 AM MDT | Wind Advisory | LBF | 16 hr |
| Mar 21, 5:42 PM MDT | Fire Weather Watch | LBF | 9 hr |
| Mar 23, 3:08 AM MDT | Wind Advisory | LBF | 15 hr |
| Apr 1, 1:07 PM MDT | Fire Weather Watch | LBF | 14 hr |
| Apr 2, 2:43 AM MDT | Red Flag Warning | LBF | 17 hr |
| Apr 3, 2:22 AM MDT | Wind Advisory | LBF | 34 hr |
| Apr 13, 3:02 PM MDT | Winter Storm Watch | LBF | 23 hr |
| Apr 14, 2:09 PM MDT | Winter Storm Warning | LBF | 24 hr |
| Apr 14, 5:19 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 18, 2:52 PM MDT | Winter Weather Advisory | LBF | 14 hr |
| Apr 22, 2:30 AM MDT | Wind Advisory | LBF | 19 hr |
| Apr 29, 2:14 PM MDT | Wind Advisory | LBF | 31 hr |
| May 8, 2:21 PM MDT | Red Flag Warning | LBF | 30 hr |
| May 9, 2:26 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 9, 8:32 PM MDT | Tornado Warning | LBF | 28 min |
| May 9, 8:34 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 9, 9:02 PM MDT | Severe Thunderstorm Warning | LBF | 28 min |
| May 12, 2:29 AM MDT | Wind Advisory | LBF | 17 hr |
| May 17, 2:02 AM MDT | Wind Advisory | LBF | 16 hr |
| May 23, 2:04 PM MDT | Flash Flood Watch | LBF | 43 hr |
| May 30, 4:50 PM MDT | Severe Thunderstorm Warning | LBF | 40 min |
| May 30, 5:25 PM MDT | Severe Thunderstorm Warning | LBF | 50 min |
| Jun 2, 5:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 7, 9:45 AM MDT | Red Flag Warning | LBF | 10 hr |
| Jun 11, 1:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 3:35 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 12:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 12, 3:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 13, 1:53 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 4:24 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 16, 1:55 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 16, 4:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 16, 4:59 PM MDT | Severe Thunderstorm Warning | LBF | 61 min |
| Jun 16, 5:29 PM MDT | Severe Thunderstorm Warning | LBF | 46 min |
| Jun 16, 5:45 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Jun 20, 2:55 AM MDT | Flash Flood Watch | LBF | 24 hr |
| Jun 24, 2:41 PM MDT | Flash Flood Watch | LBF | 15 hr |
| Jun 24, 4:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 5:46 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 5:55 PM MDT | Severe Thunderstorm Warning | LBF | 50 min |
| Jun 24, 7:13 PM MDT | Severe Thunderstorm Warning | LBF | 47 min |
| Jun 25, 5:21 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 25, 7:14 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 1:42 AM MDT | Severe Thunderstorm Warning | LBF | 63 min |
| Jun 26, 9:44 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 11:07 AM MDT | Severe Thunderstorm Warning | LBF | 38 min |
| Jun 26, 12:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 1:30 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 4:59 PM MDT | Severe Thunderstorm Warning | LBF | 61 min |
| Jun 26, 5:38 PM MDT | Severe Thunderstorm Warning | LBF | 52 min |
| Jun 26, 6:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 26, 6:26 PM MDT | Severe Thunderstorm Warning | LBF | 34 min |
| Jun 26, 6:53 PM MDT | Severe Thunderstorm Warning | LBF | 37 min |
| Jun 26, 6:56 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 7:37 PM MDT | Severe Thunderstorm Warning | LBF | 38 min |
| Jun 30, 4:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 30, 4:39 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 30, 6:33 PM MDT | Severe Thunderstorm Warning | LBF | 57 min |
| Jun 30, 7:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 2:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 2, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 4, 7:49 PM MDT | Severe Thunderstorm Warning | LBF | 41 min |
| Jul 5, 1:17 PM MDT | Mesoscale Discussion | SPC | 73 min |
| Jul 6, 2:56 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 5:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 6, 5:31 PM MDT | Severe Thunderstorm Warning | LBF | 44 min |
| Jul 6, 6:15 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Jul 8, 3:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 3:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 1:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 11, 2:07 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 3:19 PM MDT | Severe Thunderstorm Warning | LBF | 56 min |
| Jul 11, 4:01 PM MDT | Mesoscale Discussion | SPC | 29 min |
| Jul 11, 4:04 PM MDT | Flash Flood Warning | LBF | 6 hr |
| Jul 11, 4:06 PM MDT | Tornado Watch | SPC | 5 hr |
| Jul 11, 4:12 PM MDT | Severe Thunderstorm Warning | LBF | 63 min |
| Jul 11, 5:14 PM MDT | Severe Thunderstorm Warning | LBF | 61 min |
| Jul 11, 6:14 PM MDT | Severe Thunderstorm Warning | LBF | 61 min |
| Jul 11, 6:54 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 14, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 8:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 19, 10:30 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Jul 25, 8:50 PM MDT | Severe Thunderstorm Warning | LBF | 29 min |
| Jul 29, 12:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 29, 4:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jul 31, 3:33 AM MDT | Heat Advisory | LBF | 15 hr |
| Aug 4, 6:53 PM MDT | Severe Thunderstorm Warning | LBF | 67 min |
| Aug 5, 4:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 6:12 PM MDT | Severe Thunderstorm Warning | LBF | 46 min |
| Aug 5, 6:41 PM MDT | Severe Thunderstorm Warning | LBF | 38 min |
| Aug 7, 12:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Aug 7, 1:58 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 7, 5:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 7, 5:58 PM MDT | Severe Thunderstorm Warning | LBF | 47 min |
| Aug 8, 2:09 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Aug 8, 3:52 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 8, 5:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 9:25 AM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 10, 3:42 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Aug 10, 4:03 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 5:54 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Aug 11, 3:15 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Aug 11, 3:38 PM MDT | Tornado Watch | SPC | 9 hr |
| Aug 11, 8:22 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 12, 12:24 AM MDT | Severe Thunderstorm Warning | LBF | 66 min |
| Aug 14, 1:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 14, 2:29 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 6:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 17, 2:00 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 2:37 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 17, 4:43 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 25, 3:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Aug 29, 5:33 PM MDT | Severe Thunderstorm Warning | LBF | 57 min |
| Sep 20, 8:12 PM MDT | Frost Advisory | LBF | 11 hr |
| Sep 29, 10:47 AM MDT | Frost Advisory | LBF | 21 hr |
| Oct 3, 3:16 PM MDT | Fire Weather Watch | LBF | 13 hr |
| Oct 3, 3:16 PM MDT | Red Flag Warning | LBF | 35 hr |
| Oct 5, 3:22 AM MDT | Wind Advisory | LBF | 15 hr |
| Oct 5, 2:29 PM MDT | Wind Advisory | LBF | 34 hr |
| Oct 5, 6:40 PM MDT | High Wind Watch | LBF | 8 hr |
| Oct 6, 2:04 AM MDT | High Wind Warning | LBF | 22 hr |
| Oct 6, 2:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Oct 6, 2:32 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Oct 6, 4:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Oct 7, 2:50 AM MDT | Wind Advisory | LBF | 12 hr |
| Oct 7, 3:07 AM MDT | Red Flag Warning | LBF | 15 hr |
| Oct 14, 2:23 PM MDT | Fire Weather Watch | LBF | 14 hr |
| Oct 17, 2:26 PM MDT | Freeze Watch | LBF | 24 hr |
| Oct 17, 2:26 PM MDT | Freeze Warning | LBF | 19 hr |
| Oct 31, 11:57 AM MDT | Winter Storm Watch | LBF | 16 hr |
| Nov 1, 3:15 AM MDT | Winter Weather Advisory | LBF | 32 hr |
| Nov 12, 10:33 AM MST | Wind Advisory | LBF | 5 hr |
| Nov 12, 11:06 AM MST | Wind Advisory | LBF | 23 hr |
| Nov 19, 5:42 AM MST | Winter Weather Advisory | LBF | 5 hr |
| Nov 24, 12:09 PM MST | Red Flag Warning | LBF | 4 hr |
| Nov 24, 2:09 PM MST | High Wind Watch | LBF | 24 hr |
| Nov 25, 3:35 AM MST | Fire Weather Watch | LBF | 11 hr |
| Nov 25, 2:14 PM MST | High Wind Warning | LBF | 24 hr |
| Nov 25, 2:34 PM MST | Red Flag Warning | LBF | 26 hr |
| Nov 26, 2:05 PM MST | Wind Advisory | LBF | 3 hr |
| Dec 1, 2:52 AM MST | Winter Weather Advisory | LBF | 5 hr |
| Dec 30, 2:18 AM MST | High Wind Watch | LBF | 9 hr |
| Dec 30, 11:30 AM MST | High Wind Warning | LBF | 33 hr |
| Dec 30, 11:30 AM MST | Wind Advisory | LBF | 33 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.