Alert archive / Nebraska / Sarpy County
Weather alerts in Sarpy County, Nebraska, 2013
118 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sarpy County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 118
- Warnings
- 24
- Watches
- 17
- Advisories
- 23
- Busiest month
- May25 alerts
- Busiest day
- October 4, 201310 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sarpy County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 16 | 24% | 15 | 93% | 14 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 23 | 7 | 70% | 19 | 79% | 16 min |
| NWS Omaha, NE: severe thunderstorm warnings | 229 | 124 | 46% | 266 | 82% | 16 min |
| NWS Omaha, NE: flash flood warnings | 22 | 12 | 45% | 16 | 94% | 37 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 10, 7:31 PM CST | Dense Fog Advisory | OAX | 16 hr |
| Jan 27, 3:22 PM CST | Dense Fog Advisory | OAX | 35 hr |
| Jan 29, 4:00 AM CST | Winter Weather Advisory | OAX | 29 hr |
| Jan 29, 8:29 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 3:17 PM CST | Wind Advisory | OAX | 36 hr |
| Feb 18, 9:57 AM CST | Special Weather Statement | OAX | 78 min |
| Feb 18, 3:15 PM CST | Winter Storm Watch | OAX | 49 hr |
| Feb 19, 4:09 PM CST | Winter Storm Warning | OAX | 60 hr |
| Feb 21, 1:24 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 4, 3:54 AM CST | Wind Advisory | OAX | 35 hr |
| Mar 9, 3:39 AM CST | Winter Storm Warning | OAX | 46 hr |
| Mar 9, 3:39 AM CST | Winter Weather Advisory | OAX | 45 hr |
| Mar 12, 1:53 PM CDT | Special Weather Statement | OAX | 3 hr |
| Mar 23, 4:34 AM CDT | Winter Weather Advisory | OAX | 26 hr |
| Mar 24, 7:00 AM CDT | Winter Weather Advisory | OAX | 3 hr |
| Apr 9, 8:06 PM CDT | Severe Thunderstorm Warning | OAX | 24 min |
| Apr 9, 8:16 PM CDT | Severe Thunderstorm Warning | OAX | 29 min |
| Apr 9, 8:53 PM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| Apr 9, 10:01 PM CDT | Special Weather Statement | OAX | 59 min |
| Apr 24, 7:01 PM CDT | Special Weather Statement | OAX | 59 min |
| Apr 29, 7:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 1, 3:53 PM CDT | Winter Weather Advisory | OAX | 18 hr |
| May 1, 8:10 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| May 9, 3:19 PM CDT | Special Weather Statement | OAX | 86 min |
| May 11, 2:56 PM CDT | Frost Advisory | OAX | 17 hr |
| May 13, 3:36 PM CDT | Fire Weather Watch | OAX | 12 hr |
| May 14, 3:55 AM CDT | Red Flag Warning | OAX | 17 hr |
| May 18, 8:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 18, 9:26 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 19, 12:54 AM CDT | Special Weather Statement | OAX | 51 min |
| May 19, 3:14 PM CDT | Severe Thunderstorm Warning | OAX | 31 min |
| May 19, 3:46 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| May 19, 4:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 26, 6:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 26, 11:03 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 1:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 27, 1:53 AM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| May 27, 2:29 AM CDT | Severe Thunderstorm Warning | OAX | 31 min |
| May 29, 8:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 10:13 AM CDT | Flash Flood Watch | OAX | 28 hr |
| May 29, 6:24 PM CDT | Tornado Watch | SPC | 4 hr |
| May 30, 7:34 PM CDT | Severe Thunderstorm Warning | OAX | 26 min |
| May 30, 7:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 7:50 PM CDT | Severe Thunderstorm Warning | OAX | 25 min |
| May 30, 8:03 PM CDT | Severe Thunderstorm Warning | OAX | 27 min |
| May 30, 8:27 PM CDT | Severe Thunderstorm Warning | OAX | 33 min |
| Jun 8, 3:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 8, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 8, 5:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 8, 7:05 PM CDT | Special Weather Statement | OAX | 25 min |
| Jun 8, 7:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 2:28 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 3:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 3:37 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 14, 6:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 14, 7:50 PM CDT | Special Weather Statement | OAX | 40 min |
| Jun 14, 8:03 PM CDT | Severe Thunderstorm Warning | OAX | 42 min |
| Jun 14, 8:41 PM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Jun 14, 8:44 PM CDT | Severe Thunderstorm Warning | OAX | 46 min |
| Jun 14, 9:43 PM CDT | Special Weather Statement | OAX | 32 min |
| Jun 23, 7:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 24, 9:25 AM CDT | Special Weather Statement | OAX | 50 min |
| Jun 24, 9:53 AM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| Jun 25, 8:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 27, 4:28 AM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 27, 11:35 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 27, 2:05 PM CDT | Special Weather Statement | OAX | 25 min |
| Jul 2, 5:59 PM CDT | Special Weather Statement | OAX | 31 min |
| Jul 7, 9:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 3:20 PM CDT | Heat Advisory | OAX | 28 hr |
| Jul 21, 6:27 PM CDT | Severe Thunderstorm Warning | OAX | 48 min |
| Jul 21, 7:30 PM CDT | Severe Thunderstorm Warning | OAX | 45 min |
| Jul 22, 3:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 25, 5:18 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 30, 3:40 PM CDT | Dense Fog Advisory | OAX | 17 hr |
| Aug 1, 3:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 1, 6:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 1, 6:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 7:15 PM CDT | Special Weather Statement | OAX | 45 min |
| Aug 6, 5:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 6, 6:35 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 6, 8:49 AM CDT | Special Weather Statement | OAX | 26 min |
| Aug 6, 9:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 6, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 6, 9:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 25, 3:27 AM CDT | Heat Advisory | OAX | 64 hr |
| Aug 30, 3:39 AM CDT | Heat Advisory | OAX | 15 hr |
| Sep 1, 1:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Sep 1, 3:01 AM CDT | Special Weather Statement | OAX | 44 min |
| Sep 1, 3:23 AM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| Sep 19, 1:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Oct 3, 12:24 AM CDT | Special Weather Statement | OAX | 51 min |
| Oct 3, 3:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Oct 3, 7:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 3, 8:16 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Oct 3, 9:13 PM CDT | Tornado Watch | SPC | 5 hr |
| Oct 3, 9:59 PM CDT | Special Weather Statement | OAX | 31 min |
| Oct 3, 11:30 PM CDT | Severe Thunderstorm Warning | OAX | 30 min |
| Oct 3, 11:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 4, 2:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Oct 4, 1:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 4, 2:38 PM CDT | Tornado Watch | SPC | 7 hr |
| Oct 4, 5:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Oct 14, 6:11 PM CDT | Special Weather Statement | OAX | 49 min |
| Oct 14, 6:58 PM CDT | Special Weather Statement | OAX | 32 min |
| Oct 30, 6:45 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 30, 8:31 AM CDT | Severe Thunderstorm Warning | OAX | 29 min |
| Oct 30, 9:13 AM CDT | Severe Thunderstorm Warning | OAX | 32 min |
| Nov 1, 5:27 PM CDT | Special Weather Statement | OAX | 48 min |
| Nov 2, 3:55 PM CDT | Wind Advisory | OAX | 27 hr |
| Nov 21, 11:54 AM CST | Winter Weather Advisory | OAX | 12 hr |
| Dec 4, 3:20 AM CST | Winter Weather Advisory | OAX | 6 hr |
| Dec 7, 3:47 PM CST | Winter Weather Advisory | OAX | 22 hr |
| Dec 8, 3:34 AM CST | Wind Chill Advisory | OAX | 31 hr |
| Dec 13, 3:26 PM CST | Winter Weather Advisory | OAX | 6 hr |
| Dec 22, 3:40 AM CST | Wind Chill Advisory | OAX | 32 hr |
| Dec 23, 4:02 AM CST | Wind Chill Advisory | OAX | 28 hr |
| Dec 28, 3:27 PM 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.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 21 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 34 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.