Alert archive / Nebraska / Knox County
Weather alerts in Knox County, Nebraska, 2008
136 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Knox County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 136
- Warnings
- 41
- Watches
- 22
- Advisories
- 34
- Busiest month
- June36 alerts
- Busiest day
- June 5, 200811 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Knox County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 30 | 8 | 73% | 4 | 100% | 28 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 64 | 24 | 63% | 55 | 76% | 17 min |
| NWS Omaha, NE: severe thunderstorm warnings | 457 | 150 | 67% | 322 | 82% | 20 min |
| NWS Omaha, NE: flash flood warnings | 65 | 17 | 74% | 27 | 89% | 86 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 19, 3:44 PM CST | Snow Advisory | OAX | 47 hr |
| Jan 22, 3:46 PM CST | Blowing Snow Advisory | OAX | 25 hr |
| Jan 28, 3:32 PM CST | Winter Weather Advisory | OAX | 24 hr |
| Jan 28, 3:43 PM CST | Wind Advisory | OAX | 23 hr |
| Feb 3, 9:51 PM CST | Winter Weather Advisory | OAX | 14 hr |
| Feb 9, 3:30 PM CST | Wind Chill Advisory | OAX | 21 hr |
| Feb 11, 8:54 AM CST | Snow Advisory | OAX | 15 hr |
| Feb 11, 12:32 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 16, 4:06 PM CST | Wind Advisory | OAX | 26 hr |
| Feb 19, 3:37 PM CST | Wind Chill Advisory | OAX | 19 hr |
| Feb 20, 3:55 AM CST | Wind Chill Warning | OAX | 6 hr |
| Feb 24, 3:37 PM CST | Winter Weather Advisory | OAX | 24 hr |
| Feb 25, 1:43 PM CST | River Flood Warning | OAX | 19 hr |
| Mar 2, 4:07 AM CST | Wind Advisory | OAX | 14 hr |
| Mar 16, 3:10 PM CDT | Snow Advisory | OAX | 22 hr |
| Mar 29, 3:52 AM CDT | Wind Advisory | OAX | 12 hr |
| Mar 31, 2:30 AM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 31, 2:41 AM CDT | Snow Advisory | OAX | 12 hr |
| Apr 9, 4:10 AM CDT | Winter Storm Watch | OAX | 32 hr |
| Apr 10, 12:00 PM CDT | Winter Storm Warning | OAX | 23 hr |
| Apr 11, 3:28 AM CDT | Wind Advisory | OAX | 16 hr |
| Apr 14, 3:27 PM CDT | Wind Advisory | OAX | 30 hr |
| Apr 20, 3:49 AM CDT | Wind Advisory | OAX | 15 hr |
| Apr 25, 6:06 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 25, 9:55 AM CDT | Winter Weather Advisory | OAX | 6 hr |
| May 1, 3:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| May 1, 4:39 PM CDT | Severe Thunderstorm Warning | OAX | 40 min |
| May 6, 10:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 6, 12:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 6, 2:06 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| May 6, 2:28 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| May 10, 4:07 AM CDT | Wind Advisory | OAX | 27 hr |
| May 22, 6:37 AM CDT | Areal Flood Advisory | OAX | 82 days |
| May 23, 3:49 PM CDT | Flash Flood Watch | OAX | 28 hr |
| May 24, 2:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 24, 3:08 PM CDT | Tornado Watch | SPC | 6 hr |
| May 24, 5:43 PM CDT | Severe Thunderstorm Warning | OAX | 32 min |
| May 24, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 28, 11:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 29, 5:32 AM CDT | Mesoscale Discussion | SPC | 118 min |
| May 29, 5:35 AM CDT | Flash Flood Watch | OAX | 22 hr |
| May 29, 8:33 AM CDT | Areal Flood Advisory | OAX | 148 days |
| May 29, 2:30 PM CDT | Tornado Watch | SPC | 8 hr |
| May 29, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 29, 5:41 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| May 29, 5:55 PM CDT | Mesoscale Discussion | SPC | 35 min |
| May 29, 6:13 PM CDT | Flash Flood Warning | OAX | 4 hr |
| May 29, 7:06 PM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| May 29, 7:22 PM CDT | Severe Thunderstorm Warning | OAX | 23 min |
| May 29, 9:38 PM CDT | Mesoscale Discussion | SPC | 37 min |
| Jun 3, 1:19 AM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| Jun 3, 1:39 AM CDT | Severe Thunderstorm Warning | OAX | 36 min |
| Jun 3, 1:57 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 4, 3:30 PM CDT | Flash Flood Watch | OAX | 31 hr |
| Jun 4, 4:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 5, 10:11 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 5, 10:41 AM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Jun 5, 10:55 AM CDT | Tornado Watch | SPC | 8 hr |
| Jun 5, 11:24 AM CDT | Severe Thunderstorm Warning | OAX | 36 min |
| Jun 5, 11:34 AM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Jun 5, 12:17 PM CDT | Severe Thunderstorm Warning | OAX | 28 min |
| Jun 5, 12:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 5, 5:50 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 5, 6:08 PM CDT | Severe Thunderstorm Warning | OAX | 52 min |
| Jun 5, 6:16 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Jun 5, 6:59 PM CDT | Severe Thunderstorm Warning | OAX | 46 min |
| Jun 6, 8:24 AM CDT | River Flood Warning | OAX | 27 hr |
| Jun 7, 4:30 AM CDT | Flash Flood Watch | OAX | 39 hr |
| Jun 7, 10:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 7, 10:34 PM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| Jun 7, 11:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 7, 11:11 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 3:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 19, 5:45 PM CDT | Severe Thunderstorm Warning | OAX | 45 min |
| Jun 21, 3:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 21, 6:32 PM CDT | Severe Thunderstorm Warning | OAX | 58 min |
| Jun 21, 7:13 PM CDT | Severe Thunderstorm Warning | OAX | 62 min |
| Jun 21, 7:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 25, 1:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 26, 3:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 26, 6:16 AM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Jun 26, 6:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 7:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 26, 9:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:52 AM CDT | Wind Advisory | OAX | 14 hr |
| Jul 5, 2:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 6, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 11:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 1:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 15, 2:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 15, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 15, 4:43 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| Jul 19, 1:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 2:28 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 20, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 8:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 10:50 PM CDT | Severe Thunderstorm Warning | OAX | 55 min |
| Jul 20, 11:48 PM CDT | Severe Thunderstorm Warning | OAX | 42 min |
| Jul 21, 12:11 AM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Jul 21, 12:43 AM CDT | Severe Thunderstorm Warning | OAX | 17 min |
| Jul 23, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 1:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 24, 9:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 2, 10:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 2, 11:13 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 13, 4:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 27, 4:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 24, 11:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 28, 4:59 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 28, 7:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Sep 28, 7:58 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| Sep 28, 8:20 PM CDT | Severe Thunderstorm Warning | OAX | 40 min |
| Sep 28, 8:45 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Sep 28, 9:57 PM CDT | Severe Thunderstorm Warning | OAX | 48 min |
| Oct 1, 3:31 PM CDT | Frost Advisory | OAX | 16 hr |
| Oct 12, 3:43 AM CDT | Wind Advisory | OAX | 12 hr |
| Oct 13, 3:34 PM CDT | Freeze Warning | OAX | 17 hr |
| Oct 15, 3:28 PM CDT | Freeze Warning | OAX | 18 hr |
| Oct 26, 3:33 AM CDT | Wind Advisory | OAX | 15 hr |
| Oct 26, 2:16 PM CDT | High Wind Warning | OAX | 5 hr |
| Oct 26, 3:17 PM CDT | Freeze Warning | OAX | 18 hr |
| Nov 6, 4:05 AM CST | Wind Advisory | OAX | 36 hr |
| Nov 10, 3:55 PM CST | Winter Weather Advisory | OAX | 18 hr |
| Nov 10, 7:19 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 8, 12:40 PM CST | Winter Weather Advisory | OAX | 21 hr |
| Dec 13, 4:11 PM CST | Winter Weather Advisory | OAX | 30 hr |
| Dec 14, 3:35 AM CST | Wind Chill Advisory | OAX | 32 hr |
| Dec 14, 9:49 PM CST | Wind Chill Warning | OAX | 14 hr |
| Dec 15, 11:57 AM CST | Wind Chill Advisory | OAX | 4 hr |
| Dec 18, 6:37 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 18, 8:34 PM CST | Winter Weather Advisory | OAX | 7 hr |
| Dec 19, 3:34 PM CST | Wind Chill Watch | OAX | 24 hr |
| Dec 19, 3:34 PM CST | Winter Weather Advisory | OAX | 28 hr |
| Dec 20, 3:35 PM CST | Wind Chill Warning | OAX | 31 hr |
| Dec 30, 3:27 AM CST | Wind Advisory | OAX | 15 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 archive20072009
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.