Active official alertUpdated Aug 21, 2026, 8:18 PM UTC

Flash Flood Warning for Jefferson, LA; Orleans, LA; Plaquemines, LA

Official alert fields

What you need to know

Applies to: Jefferson, Orleans, Plaquemines
Effective: Aug 21, 2026, 8:18 PM UTC
Ends or expires: Aug 21, 2026, 11:15 PM UTC
Official severity: Severe
Official urgency: Immediate
Official certainty: Likely

What is happening

What the bulletin says to do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Read official NWS bulletin

Full official description

Bulletin details

FFWLIX The National Weather Service in New Orleans has issued a * Flash Flood Warning for... Northeastern Jefferson Parish in southeastern Louisiana... Southwestern Orleans Parish in southeastern Louisiana... Northwestern Plaquemines Parish in southeastern Louisiana... * Until 615 PM CDT. * At 318 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Timberlane, Harvey, Belle Chasse, Marrero, Gretna, Terrytown, Woodmere and Estelle.

Official geometry where available

Alert boundary

Lifecycle record

Official revisions

1 captured

AlertAug 21, 2026, 8:18 PM UTC
Flash Flood Warning issued August 21 at 3:18PM CDT until August 21 at 6:15PM CDT by NWS New Orleans LA
Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS New Orleans LA. This page reorganizes official fields and does not add a forecast or expand the affected area.

CAP status: Actual
Message type: Alert
Last collected: Aug 21, 2026, 9:43 PM UTC

Methodology and corrections