Alert archive / Nebraska / Sheridan County
Weather alerts in Sheridan County, Nebraska, 2009
172 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 172
- Warnings
- 67
- Watches
- 33
- Advisories
- 27
- Busiest month
- June42 alerts
- Busiest day
- June 18, 20098 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sheridan County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 48 | 18 | 63% | 21 | 100% | 19 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 10 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS North Platte, NE: tornado warnings | 71 | 11 | 85% | 20 | 65% | 15 min |
| NWS North Platte, NE: severe thunderstorm warnings | 416 | 197 | 53% | 456 | 76% | 22 min |
| NWS North Platte, NE: flash flood warnings | 8 | 4 | 50% | 4 | 100% | 61 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 9, 2:34 AM MST | Wind Advisory | LBF | 14 hr |
| Jan 11, 2:16 PM MST | Wind Advisory | LBF | 27 hr |
| Jan 12, 1:46 AM MST | High Wind Warning | LBF | 13 hr |
| Jan 18, 2:30 AM MST | Wind Advisory | LBF | 15 hr |
| Jan 19, 2:19 AM MST | Wind Advisory | LBF | 15 hr |
| Jan 19, 11:30 AM MST | Red Flag Warning | LBF | 6 hr |
| Jan 24, 2:29 AM MST | Winter Weather Advisory | LBF | 64 hr |
| Feb 6, 2:43 AM MST | Red Flag Warning | LBF | 14 hr |
| Feb 12, 2:24 PM MST | Winter Weather Advisory | LBF | 24 hr |
| Mar 5, 2:24 AM MST | Red Flag Warning | LBF | 16 hr |
| Mar 15, 11:41 AM MDT | Red Flag Warning | LBF | 7 hr |
| Mar 15, 2:10 PM MDT | Fire Weather Watch | LBF | 13 hr |
| Mar 16, 2:50 AM MDT | Red Flag Warning | LBF | 16 hr |
| Mar 21, 2:45 PM MDT | Winter Storm Watch | LBF | 24 hr |
| Mar 21, 5:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Mar 22, 2:26 PM MDT | Blizzard Warning | LBF | 46 hr |
| Mar 22, 2:26 PM MDT | Winter Weather Advisory | LBF | 51 hr |
| Mar 24, 2:41 AM MDT | Wind Advisory | LBF | 17 hr |
| Mar 29, 2:28 AM MDT | Winter Storm Watch | LBF | 25 hr |
| Mar 29, 8:57 PM MDT | Winter Storm Warning | LBF | 42 hr |
| Mar 30, 3:43 AM MDT | Winter Weather Advisory | LBF | 32 hr |
| Apr 2, 2:28 AM MDT | Winter Storm Watch | LBF | 24 hr |
| Apr 3, 2:36 AM MDT | Blizzard Warning | LBF | 51 hr |
| Apr 3, 2:36 AM MDT | Winter Storm Warning | LBF | 32 hr |
| Apr 4, 4:57 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 13, 2:35 AM MDT | Dense Fog Advisory | LBF | 2 hr |
| Apr 14, 4:28 PM MDT | Wind Advisory | LBF | 28 hr |
| Apr 22, 2:03 PM MDT | Fire Weather Watch | LBF | 13 hr |
| Apr 23, 3:18 AM MDT | Red Flag Warning | LBF | 16 hr |
| Apr 28, 2:12 AM MDT | Wind Advisory | LBF | 12 hr |
| May 8, 1:13 PM MDT | Wind Advisory | LBF | 5 hr |
| May 12, 2:09 PM MDT | Wind Advisory | LBF | 29 hr |
| May 13, 2:29 PM MDT | Frost Advisory | LBF | 17 hr |
| May 19, 1:58 PM MDT | Red Flag Warning | LBF | 4 hr |
| May 20, 2:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| May 22, 6:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 6:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| May 28, 4:34 PM MDT | Severe Thunderstorm Warning | LBF | 56 min |
| May 31, 2:35 PM MDT | Severe Thunderstorm Warning | LBF | 25 min |
| May 31, 2:57 PM MDT | Severe Thunderstorm Warning | LBF | 63 min |
| May 31, 3:34 PM MDT | Severe Thunderstorm Warning | LBF | 56 min |
| Jun 5, 2:48 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 5, 4:55 PM MDT | Severe Thunderstorm Warning | LBF | 50 min |
| Jun 5, 5:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 5, 6:29 PM MDT | Severe Thunderstorm Warning | LBF | 46 min |
| Jun 6, 12:02 AM MDT | Severe Thunderstorm Warning | LBF | 58 min |
| Jun 9, 6:04 PM MDT | Areal Flood Advisory | LBF | 100 min |
| Jun 13, 4:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 13, 5:21 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 7:58 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 14, 1:50 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 14, 6:46 PM MDT | Tornado Watch | SPC | 5 hr |
| Jun 15, 6:02 PM MDT | Severe Thunderstorm Warning | LBF | 58 min |
| Jun 15, 6:58 PM MDT | Severe Thunderstorm Warning | LBF | 22 min |
| Jun 17, 4:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 17, 4:26 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 17, 4:50 PM MDT | Severe Thunderstorm Warning | LBF | 55 min |
| Jun 17, 5:32 PM MDT | Severe Thunderstorm Warning | LBF | 58 min |
| Jun 17, 5:35 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 9:40 PM MDT | Severe Thunderstorm Warning | LBF | 50 min |
| Jun 17, 9:49 PM MDT | Severe Thunderstorm Warning | LBF | 41 min |
| Jun 17, 10:01 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 17, 10:27 PM MDT | Severe Thunderstorm Warning | LBF | 48 min |
| Jun 17, 10:30 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Jun 17, 11:15 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Jun 18, 12:46 AM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 18, 5:52 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jun 18, 6:49 PM MDT | Severe Thunderstorm Warning | LBF | 41 min |
| Jun 18, 7:27 PM MDT | Severe Thunderstorm Warning | LBF | 33 min |
| Jun 23, 12:07 AM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 23, 12:38 AM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 23, 1:09 AM MDT | Severe Thunderstorm Warning | LBF | 51 min |
| Jun 23, 1:49 AM MDT | Severe Thunderstorm Warning | LBF | 71 min |
| Jun 23, 2:00 AM MDT | Severe Thunderstorm Warning | LBF | 60 min |
| Jun 23, 2:17 AM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 23, 2:18 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 23, 5:37 PM MDT | Tornado Watch | SPC | 6 hr |
| Jun 26, 2:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 26, 2:38 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 3:50 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 5:55 PM MDT | Severe Thunderstorm Warning | LBF | 35 min |
| Jun 29, 3:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 30, 5:40 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 30, 6:39 PM MDT | Severe Thunderstorm Warning | LBF | 66 min |
| Jun 30, 7:27 PM MDT | Severe Thunderstorm Warning | LBF | 48 min |
| Jun 30, 8:17 PM MDT | Severe Thunderstorm Warning | LBF | 43 min |
| Jul 1, 12:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 1, 4:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 1, 6:38 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 9:19 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 2, 2:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 2, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 2, 9:08 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 3, 2:21 PM MDT | Severe Thunderstorm Warning | LBF | 39 min |
| Jul 3, 2:48 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 2:57 PM MDT | Severe Thunderstorm Warning | LBF | 48 min |
| Jul 3, 3:11 PM MDT | Severe Thunderstorm Warning | LBF | 33 min |
| Jul 7, 10:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 10, 12:32 AM MDT | Severe Thunderstorm Warning | LBF | 43 min |
| Jul 10, 5:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 10, 7:22 PM MDT | Severe Thunderstorm Warning | LBF | 42 min |
| Jul 11, 12:28 AM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 11, 3:56 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 11, 10:30 PM MDT | Severe Thunderstorm Warning | LBF | 75 min |
| Jul 13, 4:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 2:22 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 20, 1:52 PM MDT | Severe Thunderstorm Warning | LBF | 53 min |
| Jul 20, 2:25 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 5:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 23, 1:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 23, 2:30 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 6:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 3, 7:44 PM MDT | Severe Thunderstorm Warning | LBF | 46 min |
| Aug 3, 8:35 PM MDT | Severe Thunderstorm Warning | LBF | 40 min |
| Aug 4, 3:37 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 5:19 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 4, 6:40 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Aug 4, 9:47 PM MDT | Severe Thunderstorm Warning | LBF | 58 min |
| Aug 4, 10:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 4, 10:40 PM MDT | Severe Thunderstorm Warning | LBF | 65 min |
| Aug 6, 4:07 PM MDT | Tornado Watch | SPC | 4 hr |
| Aug 6, 7:14 PM MDT | Severe Thunderstorm Warning | LBF | 46 min |
| Aug 6, 7:30 PM MDT | Severe Thunderstorm Warning | LBF | 45 min |
| Aug 6, 7:34 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Aug 7, 5:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Aug 7, 7:57 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 7, 8:52 PM MDT | Areal Flood Advisory | LBF | 3 hr |
| Aug 7, 10:16 PM MDT | Severe Thunderstorm Warning | LBF | 59 min |
| Aug 7, 10:53 PM MDT | Severe Thunderstorm Warning | LBF | 37 min |
| Aug 8, 2:18 AM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 8, 8:57 AM MDT | Severe Thunderstorm Warning | LBF | 48 min |
| Aug 8, 9:52 AM MDT | Mesoscale Discussion | SPC | 23 min |
| Aug 8, 7:29 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 12, 1:22 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 14, 3:28 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 3:50 PM MDT | Severe Thunderstorm Warning | LBF | 55 min |
| Aug 14, 4:05 PM MDT | Flash Flood Warning | LBF | 3 hr |
| Aug 15, 2:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 15, 4:53 PM MDT | Severe Thunderstorm Warning | LBF | 67 min |
| Aug 15, 5:33 PM MDT | Severe Thunderstorm Warning | LBF | 57 min |
| Aug 15, 5:45 PM MDT | Severe Thunderstorm Warning | LBF | 60 min |
| Aug 15, 5:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 18, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 18, 5:10 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 18, 6:22 PM MDT | Severe Thunderstorm Warning | LBF | 38 min |
| Sep 7, 5:34 PM MDT | Severe Thunderstorm Warning | LBF | 42 min |
| Sep 8, 1:53 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 8, 4:52 PM MDT | Severe Thunderstorm Warning | LBF | 53 min |
| Sep 26, 1:34 PM MDT | Wind Advisory | LBF | 25 hr |
| Sep 27, 2:54 PM MDT | Freeze Warning | LBF | 18 hr |
| Sep 30, 2:35 AM MDT | High Wind Watch | LBF | 24 hr |
| Sep 30, 2:57 PM MDT | Wind Advisory | LBF | 49 hr |
| Sep 30, 5:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Oct 1, 2:51 AM MDT | High Wind Warning | LBF | 17 hr |
| Oct 2, 12:58 PM MDT | Freeze Warning | LBF | 19 hr |
| Oct 9, 12:53 PM MDT | Winter Weather Advisory | LBF | 20 hr |
| Oct 10, 2:53 PM MDT | Winter Storm Watch | LBF | 12 hr |
| Oct 11, 2:41 AM MDT | Winter Weather Advisory | LBF | 30 hr |
| Oct 27, 2:14 AM MDT | Winter Storm Watch | LBF | 25 hr |
| Oct 27, 3:04 PM MDT | Winter Storm Warning | LBF | 66 hr |
| Oct 28, 12:13 PM MDT | Mesoscale Discussion | SPC | 6 hr |
| Oct 28, 9:56 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 29, 5:57 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Nov 6, 8:23 AM MST | Red Flag Warning | LBF | 9 hr |
| Dec 6, 2:13 AM MST | Winter Weather Advisory | LBF | 15 hr |
| Dec 7, 2:18 PM MST | Winter Weather Advisory | LBF | 36 hr |
| Dec 8, 2:41 AM MST | Wind Chill Advisory | LBF | 30 hr |
| Dec 9, 2:43 PM MST | Wind Chill Advisory | LBF | 18 hr |
| Dec 21, 3:13 AM MST | Winter Storm Watch | LBF | 11 hr |
| Dec 21, 2:40 PM MST | Winter Storm Warning | LBF | 5 days |
| Dec 21, 4:15 PM MST | Winter Weather Advisory | LBF | 6 hr |
| Dec 24, 3:44 AM MST | Winter Weather Advisory | LBF | 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 | 48 |
| Severe Thunderstorm Watch | 18 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 45 |
| Flooding | |
| Flash Flood Warning | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 11 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.