Live · updated 1 min ago
Jefferson County weather alerts
No active National Weather Service alerts for Jefferson County, Nebraska right now. The most recent was a Freeze Warning that ended Oct 17, 9:00 AM.
21 in the last 30 days 38 in 12 months (since Aug 30) most common: Flood Warning Get alerts on your phone →
Active alerts for Jefferson County
Refreshed every few minutes; times in CDT.
All clear in Jefferson County
No warnings, watches or advisories are in effect. See what is active across the country, or check a neighbouring county below.
Get Jefferson County alerts on your phone before you think to look them up
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Where
Jefferson County on the map
Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.
Last 30 days
Recent alerts for Jefferson County
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Freeze Warning | Oct 17, 8:50 AM | Oct 17, 9:00 AM | Omaha/Valley NE |
| Freeze Warning | Oct 16, 10:01 AM | Oct 17, 9:00 AM | Omaha/Valley NE |
| Freeze Watch | Oct 16, 1:38 AM | Oct 17, 8:00 AM | Omaha/Valley NE |
| Freeze Watch | Oct 15, 1:18 PM | Oct 17, 8:00 AM | Omaha/Valley NE |
| Flood Warning | Oct 2, 8:56 AM | Oct 3, 7:00 AM | Omaha/Valley NE |
| Flood Warning | Oct 1, 8:58 PM | Oct 4, 12:32 AM | Omaha/Valley NE |
| Flood Warning | Oct 1, 12:51 PM | Oct 1, 8:00 PM | Omaha/Valley NE |
| Flood Warning | Oct 1, 8:58 AM | Oct 3, 10:36 PM | Omaha/Valley NE |
| Flood Warning | Oct 1, 5:14 AM | Oct 3, 5:54 PM | Omaha/Valley NE |
| Flood Watch | Oct 1, 4:59 AM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Warning | Oct 1, 2:36 AM | Oct 3, 5:54 PM | Omaha/Valley NE |
| Flood Warning | Oct 1, 1:58 AM | Oct 1, 1:00 PM | Omaha/Valley NE |
| Flood Warning | Oct 1, 1:00 AM | Oct 4, 9:00 AM | Omaha/Valley NE |
| Flood Warning | Sep 30, 11:37 PM | Oct 1, 1:00 PM | Omaha/Valley NE |
| Flood Warning | Sep 30, 11:04 PM | Oct 1, 2:00 AM | Omaha/Valley NE |
| Flood Watch | Sep 30, 7:49 PM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Watch | Sep 30, 2:00 PM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Watch | Sep 30, 12:46 AM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Watch | Sep 29, 8:33 PM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Watch | Sep 29, 10:06 AM | Oct 1, 7:00 PM | Omaha/Valley NE |
| Flood Watch | Sep 28, 1:10 PM | Oct 1, 7:00 PM | Omaha/Valley NE |
Pattern
What Jefferson County gets alerted for
Every alert that named Jefferson County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.
Plain English
What these alerts mean
A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.
Sub-freezing temperatures are imminent. Protect tender plants and outdoor plumbing.
Sub-freezing temperatures are possible. Be ready to protect plants and pipes.
Flooding of rivers, streams or low-lying areas is occurring or expected. Avoid flooded roads and monitor river levels.
Conditions are favourable for flooding. Have a plan in case a warning is issued.
Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.
Visibility of a quarter mile or less is expected. Slow down and use low beams.
A storm with hail of 1 inch or larger, winds of 58 mph or more, or both, is occurring or imminent. Move indoors and away from windows.
Conditions are favourable for tornadoes in and near the watch area. Review your shelter plan and stay alert for warnings.
A heads-up about conditions that do not meet warning or advisory criteria but still deserve attention, such as a strong storm, patchy fog or a brief burst of snow.
Nearby
Alerts near Jefferson County
Neighbouring counties in Nebraska
Questions
About Jefferson County alerts
How do I get Jefferson County weather alerts on my iPhone?
Install Forecast Bar, add Jefferson County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Jefferson County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.
Where do these alerts come from?
From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Jefferson County. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.
What is the difference between a watch, a warning and an advisory?
A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.
Can I get this data as JSON?
Yes. /weather-alerts/ne/jefferson-county.json returns the active alerts, the last 30 days and the 12-month counts for Jefferson County, refreshed every minute. Please cache responses and credit National Weather Service as the source.
Never find out about a Jefferson County alert from this page again
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