Alert archive / Nebraska / Sarpy County
Weather alerts in Sarpy County, Nebraska, 2019
146 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 146
- Warnings
- 34
- Watches
- 24
- Advisories
- 53
- Busiest month
- March24 alerts
- Busiest day
- May 28, 20199 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, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 3 | 25% | 2 | 100% | 27 min |
| Flash flood warnings | 5 | 1 | 80% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 23 | 7 | 70% | 9 | 78% | 18 min |
| NWS Omaha, NE: severe thunderstorm warnings | 191 | 82 | 57% | 179 | 74% | 17 min |
| NWS Omaha, NE: flash flood warnings | 47 | 10 | 79% | 27 | 81% | 284 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 7, 2:53 PM CST | Wind Advisory | OAX | 25 hr |
| Jan 10, 3:32 PM CST | Winter Weather Advisory | OAX | 48 hr |
| Jan 14, 9:13 PM CST | Dense Fog Advisory | OAX | 12 hr |
| Jan 17, 3:38 AM CST | Winter Weather Advisory | OAX | 48 hr |
| Jan 21, 3:47 AM CST | Winter Weather Advisory | OAX | 50 hr |
| Jan 27, 3:04 AM CST | High Wind Warning | OAX | 31 hr |
| Jan 27, 3:55 AM CST | Wind Advisory | OAX | 38 hr |
| Jan 27, 3:18 PM CST | Wind Chill Watch | OAX | 36 hr |
| Jan 28, 12:43 AM CST | Wind Advisory | OAX | 17 hr |
| Jan 28, 2:38 AM CST | Wind Chill Warning | OAX | 57 hr |
| Jan 28, 2:38 AM CST | Wind Chill Advisory | OAX | 3 days |
| Jan 29, 3:15 PM CST | Wind Chill Advisory | OAX | 7 hr |
| Feb 2, 12:14 PM CST | Dense Fog Advisory | OAX | 25 hr |
| Feb 5, 7:49 AM CST | Special Weather Statement | OAX | 86 min |
| Feb 5, 3:31 PM CST | Winter Weather Advisory | OAX | 50 hr |
| Feb 7, 3:29 AM CST | Wind Chill Advisory | OAX | 33 hr |
| Feb 10, 2:55 AM CST | Winter Weather Advisory | OAX | 9 hr |
| Feb 10, 3:56 AM CST | Winter Weather Advisory | OAX | 44 hr |
| Feb 15, 3:35 PM CST | Winter Weather Advisory | OAX | 50 hr |
| Feb 16, 7:26 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 18, 3:50 AM CST | Winter Storm Watch | OAX | 24 hr |
| Feb 19, 3:40 AM CST | Winter Storm Warning | OAX | 32 hr |
| Feb 21, 4:18 AM CST | Winter Weather Advisory | OAX | 71 hr |
| Feb 21, 4:13 PM CST | Winter Storm Watch | OAX | 22 hr |
| Feb 22, 1:46 PM CST | Blizzard Warning | OAX | 37 hr |
| Mar 2, 3:22 AM CST | Wind Chill Advisory | OAX | 57 hr |
| Mar 6, 3:21 AM CST | Winter Weather Advisory | OAX | 36 hr |
| Mar 9, 3:27 AM CST | Wind Advisory | OAX | 21 hr |
| Mar 11, 3:31 AM CDT | Flood Watch | OAX | 3 days |
| Mar 12, 1:48 PM CDT | Areal Flood Advisory | OAX | 6 hr |
| Mar 12, 3:13 PM CDT | Dense Fog Advisory | OAX | 25 hr |
| Mar 13, 9:38 AM CDT | River Flood Warning | OAX | 6 days |
| Mar 13, 9:38 AM CDT | River Flood Warning | OAX | 7 days |
| Mar 13, 9:41 AM CDT | Areal Flood Warning | OAX | 3 hr |
| Mar 13, 1:25 PM CDT | Wind Advisory | OAX | 3 hr |
| Mar 13, 1:26 PM CDT | Areal Flood Warning | OAX | 6 hr |
| Mar 13, 2:58 PM CDT | River Flood Warning | OAX | 10 days |
| Mar 13, 4:02 PM CDT | Wind Advisory | OAX | 33 hr |
| Mar 13, 6:29 PM CDT | Areal Flood Warning | OAX | 39 hr |
| Mar 14, 10:54 AM CDT | Flash Flood Warning | OAX | 5 hr |
| Mar 14, 7:39 PM CDT | Flash Flood Warning | OAX | 12 hr |
| Mar 15, 9:45 AM CDT | Areal Flood Warning | OAX | 24 hr |
| Mar 16, 3:56 AM CDT | Flash Flood Warning | OAX | 8 hr |
| Mar 16, 11:23 AM CDT | Areal Flood Warning | OAX | 48 hr |
| Mar 18, 11:01 AM CDT | Areal Flood Warning | OAX | 24 hr |
| Mar 19, 10:54 AM CDT | Areal Flood Warning | OAX | 12 hr |
| Mar 19, 11:48 AM CDT | River Flood Advisory | OAX | 36 hr |
| Mar 19, 11:48 AM CDT | River Flood Advisory | OAX | 27 hr |
| Mar 23, 10:51 AM CDT | River Flood Advisory | OAX | 10 days |
| Apr 5, 1:05 AM CDT | Dense Fog Advisory | OAX | 9 hr |
| Apr 8, 9:44 AM CDT | River Flood Advisory | OAX | 50 days |
| Apr 10, 4:06 AM CDT | Wind Advisory | OAX | 30 hr |
| Apr 10, 5:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 10, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 10, 9:03 PM CDT | Severe Thunderstorm Warning | OAX | 57 min |
| Apr 10, 10:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 10:21 PM CDT | Severe Thunderstorm Warning | OAX | 13 min |
| Apr 27, 3:24 AM CDT | Frost Advisory | OAX | 24 hr |
| May 5, 1:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 5, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 5, 5:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 17, 11:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 11:41 AM CDT | Special Weather Statement | OAX | 79 min |
| May 21, 8:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 23, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 26, 1:17 PM CDT | Flash Flood Watch | OAX | 25 hr |
| May 27, 10:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 11:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| May 28, 3:18 AM CDT | Flash Flood Watch | OAX | 24 hr |
| May 28, 3:51 AM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| May 28, 4:17 AM CDT | Flash Flood Warning | OAX | 3 hr |
| May 28, 4:23 AM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| May 28, 6:31 AM CDT | River Flood Warning | OAX | 16 days |
| May 28, 7:07 AM CDT | Areal Flood Warning | OAX | 5 hr |
| May 28, 2:10 PM CDT | River Flood Warning | OAX | 49 hr |
| May 29, 8:53 AM CDT | River Flood Warning | OAX | 34 hr |
| Jun 12, 11:24 PM CDT | River Flood Advisory | OAX | 50 days |
| Jun 20, 9:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 2:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 21, 2:39 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 21, 4:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 21, 7:26 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 25, 2:19 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 25, 3:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 26, 1:55 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 2:26 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:01 PM CDT | Heat Advisory | OAX | 30 hr |
| Jun 29, 2:55 AM CDT | Heat Advisory | OAX | 41 hr |
| Jul 2, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 3, 7:52 PM CDT | Special Weather Statement | OAX | 23 min |
| Jul 3, 8:18 PM CDT | Special Weather Statement | OAX | 27 min |
| Jul 5, 4:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 4:36 AM CDT | Special Weather Statement | OAX | 54 min |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 5 hr |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 5 hr |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 36 hr |
| Jul 16, 3:56 PM CDT | Excessive Heat Warning | OAX | 4 days |
| Jul 20, 11:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 21, 3:12 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Aug 7, 3:50 AM CDT | Special Weather Statement | OAX | 55 min |
| Aug 11, 8:25 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Aug 11, 2:47 PM CDT | Flash Flood Watch | OAX | 14 hr |
| Aug 11, 10:22 PM CDT | River Flood Advisory | OAX | 3 days |
| Aug 12, 3:03 AM CDT | Special Weather Statement | OAX | 57 min |
| Aug 20, 10:18 AM CDT | Heat Advisory | OAX | 11 hr |
| Aug 20, 3:20 PM CDT | Excessive Heat Warning | OAX | 6 hr |
| Sep 11, 10:19 AM CDT | River Flood Advisory | OAX | 25 hr |
| Sep 12, 9:01 PM CDT | River Flood Advisory | OAX | 14 hr |
| Sep 13, 11:33 AM CDT | River Flood Warning | OAX | 21 days |
| Sep 18, 4:04 PM CDT | Flood Watch | OAX | 21 hr |
| Sep 18, 10:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 4:47 AM CDT | Special Weather Statement | OAX | 43 min |
| Sep 19, 5:52 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Sep 19, 6:56 AM CDT | Flash Flood Warning | OAX | 4 hr |
| Sep 19, 11:02 AM CDT | Areal Flood Warning | OAX | 5 hr |
| Sep 21, 5:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 21, 7:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 9:47 PM CDT | Areal Flood Advisory | OAX | 4 hr |
| Sep 24, 4:43 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 24, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 29, 9:57 AM CDT | River Flood Advisory | OAX | 40 days |
| Sep 30, 3:58 AM CDT | Flash Flood Watch | OAX | 41 hr |
| Sep 30, 1:02 PM CDT | River Flood Warning | OAX | 45 hr |
| Oct 1, 3:12 PM CDT | Areal Flood Advisory | OAX | 3 hr |
| Oct 1, 8:35 PM CDT | Flood Watch | OAX | 9 hr |
| Oct 5, 6:00 AM CDT | Special Weather Statement | OAX | 30 min |
| Oct 5, 10:20 AM CDT | River Flood Warning | OAX | 3 days |
| Oct 10, 3:37 AM CDT | Freeze Watch | OAX | 25 hr |
| Oct 10, 9:03 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Oct 11, 4:12 AM CDT | Freeze Warning | OAX | 30 hr |
| Oct 18, 3:47 AM CDT | Wind Advisory | OAX | 14 hr |
| Oct 20, 5:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Oct 20, 8:39 PM CDT | Special Weather Statement | OAX | 36 min |
| Oct 21, 3:42 AM CDT | Wind Advisory | OAX | 30 hr |
| Oct 29, 3:37 AM CDT | Winter Weather Advisory | OAX | 42 hr |
| Nov 10, 2:34 PM CST | Winter Weather Advisory | OAX | 18 hr |
| Nov 25, 3:32 PM CST | Winter Weather Advisory | OAX | 41 hr |
| Nov 27, 4:07 PM CST | Winter Weather Advisory | OAX | 47 hr |
| Nov 30, 3:20 AM CST | Wind Advisory | OAX | 33 hr |
| Dec 9, 1:30 AM CST | Wind Advisory | OAX | 9 hr |
| Dec 9, 6:57 AM CST | Special Weather Statement | OAX | 63 min |
| Dec 9, 7:50 AM CST | Special Weather Statement | OAX | 85 min |
| Dec 13, 6:38 AM CST | Special Weather Statement | OAX | 112 min |
| Dec 16, 11:29 PM CST | Dense Fog Advisory | OAX | 10 hr |
| Dec 28, 9:33 AM CST | Flood Watch | OAX | 10 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 archive20182020
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.