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Jefferson Parish weather alerts

1 active alert for Jefferson Parish, Louisiana right now: a Heat Advisory.

7 in the last 30 days 7 in 12 months (since Aug 30) most common: Flash Flood Warning Get alerts on your phone →

Active alerts for Jefferson Parish

Refreshed every few minutes; times in CDT.

Moderate Expected Starts in 12 hr

Heat Advisory

Issued Sun, Sep 6, 11:03 AM CDT by NWS New Orleans LA Until Mon, Sep 7, 7:00 PM CDT (in 20 hr)

Area: Pointe Coupee; West Feliciana; East Feliciana; St. Helena; Washington; Iberville; West Baton Rouge; East Baton Rouge; Assumption; St. James; St. John The Baptist; Upper St. Bernard; Northern Tangipahoa; Southeast St. ...

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...From 11 AM to 7 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

What it means: Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.

Full alert with map and forecast →

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Where

Jefferson Parish 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 Parish

AlertIssuedEndedIssued by
Flash Flood Warning Sep 5, 5:30 PM Cancelled Sep 5, 6:20 PM New Orleans LA
Flood Advisory Sep 5, 5:17 PM Cancelled Sep 5, 5:31 PM New Orleans LA
Flash Flood Warning Sep 5, 11:03 AM Cancelled Sep 5, 12:36 PM New Orleans LA
Flash Flood Warning Sep 4, 7:39 AM Cancelled Sep 4, 9:01 AM New Orleans LA
Flash Flood Warning Sep 4, 6:22 AM Sep 4, 9:15 AM New Orleans LA
Flood Advisory Sep 4, 5:57 AM Cancelled Sep 4, 6:24 AM New Orleans LA

Pattern

What Jefferson Parish gets alerted for

Every alert that named Jefferson Parish in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.

Flash Flood Warning
4
Flood Advisory
2
Heat Advisory
1

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.

Heat Advisory

Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.

Flash Flood Warning

Flash flooding is occurring or imminent. Move to higher ground; never drive into water covering a road.

Flood Advisory

Minor flooding of streets, streams or low-lying areas is expected. Expect ponding on roads and use caution when driving.

Nearby

Alerts near Jefferson Parish

Cities in Jefferson Parish

Kenner

Neighbouring parishes in Louisiana

St. Charles Parish1 Orleans Parish1 Lafourche Parish1 St. John the Baptist Parish1 Plaquemines Parish1 St. Bernard Parish1 St. Tammany Parish1 All of Louisiana →

Questions

About Jefferson Parish alerts

How do I get Jefferson Parish weather alerts on my iPhone?

Install Forecast Bar, add Jefferson Parish as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Jefferson Parish 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 Parish. 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/la/jefferson-parish.json returns the active alerts, the last 30 days and the 12-month counts for Jefferson Parish, refreshed every minute. Please cache responses and credit National Weather Service as the source.

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