Alert archive / Nebraska / Antelope County
Weather alerts in Antelope County, Nebraska, 2009
120 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Antelope County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 120
- Warnings
- 30
- Watches
- 19
- Advisories
- 36
- Busiest month
- August22 alerts
- Busiest day
- March 23, 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.
Antelope County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 6 | 65% | 4 | 100% | 31 min |
| Flash flood warnings | 5 | 2 | 60% | 2 | 100% | 121 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 17 | 5 | 71% | 7 | 100% | 16 min |
| NWS Omaha, NE: severe thunderstorm warnings | 216 | 129 | 40% | 280 | 85% | 21 min |
| NWS Omaha, NE: flash flood warnings | 7 | 2 | 71% | 5 | 80% | 137 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, 11:39 AM CST | Winter Weather Advisory | OAX | 4 hr |
| Jan 11, 2:49 PM CST | Wind Advisory | OAX | 13 hr |
| Jan 12, 2:56 AM CST | Winter Weather Advisory | OAX | 7 hr |
| Jan 12, 9:31 AM CST | Wind Advisory | OAX | 11 hr |
| Jan 12, 10:56 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 2:41 PM CST | Winter Weather Advisory | OAX | 5 hr |
| Jan 14, 4:09 AM CST | Wind Chill Advisory | OAX | 32 hr |
| Jan 17, 4:42 AM CST | Wind Advisory | OAX | 2 hr |
| Jan 24, 3:12 PM CST | Winter Weather Advisory | OAX | 39 hr |
| Feb 9, 3:13 AM CST | Wind Advisory | OAX | 24 hr |
| Feb 11, 1:02 PM CST | Winter Storm Watch | OAX | 25 hr |
| Feb 12, 1:44 PM CST | Winter Weather Advisory | OAX | 24 hr |
| Feb 20, 3:34 PM CST | Wind Advisory | OAX | 6 hr |
| Feb 25, 3:10 PM CST | Winter Weather Advisory | OAX | 21 hr |
| Feb 27, 3:35 AM CST | Winter Weather Advisory | OAX | 33 hr |
| Feb 27, 11:25 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 27, 6:22 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 6, 3:49 PM CST | Winter Storm Watch | OAX | 12 hr |
| Mar 7, 4:13 AM CST | Winter Storm Warning | OAX | 23 hr |
| Mar 7, 4:13 AM CST | Winter Weather Advisory | OAX | 29 hr |
| Mar 9, 3:48 PM CDT | Winter Weather Advisory | OAX | 23 hr |
| Mar 10, 3:04 PM CDT | Wind Chill Advisory | OAX | 19 hr |
| Mar 22, 3:13 PM CDT | Wind Advisory | OAX | 31 hr |
| Mar 23, 1:38 AM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| Mar 23, 10:13 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 23, 12:16 PM CDT | Tornado Watch | SPC | 4 hr |
| Mar 23, 2:13 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| Mar 23, 2:44 PM CDT | Severe Thunderstorm Warning | OAX | 46 min |
| Mar 23, 3:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 23, 3:26 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Mar 23, 3:50 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 24, 4:11 AM CDT | Wind Advisory | OAX | 17 hr |
| Mar 29, 3:00 PM CDT | Winter Storm Watch | OAX | 25 hr |
| Mar 30, 4:06 AM CDT | Winter Storm Warning | OAX | 39 hr |
| Apr 2, 3:20 PM CDT | Winter Storm Watch | OAX | 36 hr |
| Apr 3, 2:49 PM CDT | Blizzard Watch | OAX | 13 hr |
| Apr 4, 3:00 AM CDT | Wind Advisory | OAX | 16 hr |
| Apr 4, 3:20 AM CDT | Blizzard Warning | OAX | 28 hr |
| Apr 4, 9:11 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 5, 3:30 AM CDT | Winter Weather Advisory | OAX | 13 hr |
| Apr 5, 6:28 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 20, 11:02 AM CDT | Wind Advisory | OAX | 8 hr |
| May 13, 12:46 AM CDT | Mesoscale Discussion | SPC | 29 min |
| May 19, 3:43 AM CDT | Wind Advisory | OAX | 16 hr |
| May 20, 3:44 AM CDT | Wind Advisory | OAX | 16 hr |
| May 20, 11:53 PM CDT | Severe Thunderstorm Warning | OAX | 52 min |
| May 25, 9:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 11:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 7, 3:49 PM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Jun 17, 5:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 17, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 8:07 PM CDT | Severe Thunderstorm Warning | OAX | 53 min |
| Jun 17, 8:59 PM CDT | Severe Thunderstorm Warning | OAX | 61 min |
| Jun 18, 4:21 AM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| Jun 18, 6:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 18, 11:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 18, 11:55 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 21, 3:46 PM CDT | Heat Advisory | OAX | 3 days |
| Jun 23, 7:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 23, 8:01 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 11:53 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 8:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 26, 9:05 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 26, 10:51 PM CDT | Severe Thunderstorm Warning | OAX | 54 min |
| Jun 26, 11:44 PM CDT | Severe Thunderstorm Warning | OAX | 61 min |
| Jun 26, 11:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 7, 9:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 7, 9:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 7, 11:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 9, 6:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 9, 7:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 11:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 16, 4:12 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 2:16 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Jul 31, 5:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 31, 6:50 PM CDT | Severe Thunderstorm Warning | OAX | 40 min |
| Jul 31, 7:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 6:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 8:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 10:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 4, 11:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 7, 1:23 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 8, 2:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 15, 5:35 PM CDT | Flash Flood Warning | OAX | 3 hr |
| Aug 15, 7:01 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Aug 15, 8:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 15, 8:31 PM CDT | Flash Flood Warning | OAX | 3 hr |
| Aug 15, 11:08 PM CDT | Flash Flood Warning | OAX | 4 hr |
| Aug 15, 11:35 PM CDT | Severe Thunderstorm Warning | OAX | 55 min |
| Aug 15, 11:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 16, 2:58 AM CDT | Flash Flood Warning | OAX | 3 hr |
| Aug 19, 2:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 19, 4:49 PM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Aug 24, 9:47 PM CDT | Severe Thunderstorm Warning | OAX | 58 min |
| Aug 24, 10:21 PM CDT | Areal Flood Advisory | OAX | 116 min |
| Aug 24, 10:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 24, 11:30 PM CDT | Flash Flood Warning | OAX | 6 hr |
| Sep 2, 4:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 10, 5:17 AM CDT | Dense Fog Advisory | OAX | 4 hr |
| Sep 26, 3:45 PM CDT | Wind Advisory | OAX | 28 hr |
| Sep 28, 3:30 PM CDT | Frost Advisory | OAX | 17 hr |
| Oct 1, 3:10 PM CDT | Wind Advisory | OAX | 24 hr |
| Oct 9, 4:13 AM CDT | Freeze Warning | OAX | 29 hr |
| Oct 11, 3:27 PM CDT | Winter Weather Advisory | OAX | 19 hr |
| Oct 22, 4:08 PM CDT | Winter Weather Advisory | OAX | 14 hr |
| Dec 6, 4:20 AM CST | Winter Storm Watch | OAX | 35 hr |
| Dec 6, 4:20 AM CST | Winter Weather Advisory | OAX | 23 hr |
| Dec 7, 4:04 AM CST | Winter Storm Warning | OAX | 41 hr |
| Dec 7, 3:45 PM CST | Blizzard Watch | OAX | 21 hr |
| Dec 8, 12:55 PM CST | Blizzard Warning | OAX | 17 hr |
| Dec 8, 9:38 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 5:42 AM CST | Winter Weather Advisory | OAX | 10 hr |
| Dec 9, 3:34 PM CST | Wind Chill Advisory | OAX | 18 hr |
| Dec 21, 4:01 AM CST | Winter Storm Watch | OAX | 60 hr |
| Dec 22, 3:47 PM CST | Winter Storm Warning | OAX | 56 hr |
| Dec 22, 3:47 PM CST | Winter Weather Advisory | OAX | 32 hr |
| Dec 24, 4:00 PM CST | Blizzard Warning | OAX | 44 hr |
| Dec 25, 7:21 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 25, 3:26 PM CST | Winter Weather Advisory | OAX | 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 | 17 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 35 |
| Flooding | |
| Flash Flood Warning | 5 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 4 |
| Blizzard Watch | 2 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 16 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 13 |
| 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.