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Special Marine Warning
Special Marine Warning issued August 23 at 4:53PM CDT until August 23 at 6:15PM CDT by NWS New Orleans LA Expires Sun, 6:15 PM CDT.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
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What’s next
Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Mandeville, Louisiana 70448. Forecasts and alerts update from NOAA and the National Weather Service.
96°Chance Showers And Thunderstorms44% rain94°Chance Showers And Thunderstorms46% rain
93°Chance Showers And Thunderstorms45% rain89°Chance Showers And Thunderstorms33% rain85°Slight Chance Showers And Thunderstorms24% rain
83°Partly Cloudy12% rain
82°Mostly Clear6% rain82°Mostly Clear2% rainNext 24 hours
Rain Timeline
Most likely around 4 PM, 5 PM, 6 PM. Expected type: Thunderstorms.
44%Thunderstorms
46%Thunderstorms
45%Thunderstorms
33%Thunderstorms
24%Thunderstorms
12%None
6%None
2%None
2%None
1%None
0%None
0%None
0%None
0%None
0%None
0%None
1%None
1%None
2%None
2%None
4%None
11%None
19%Thunderstorms
23%Thunderstorms
Official NWS outlook
7-Day Forecast
Today
! NWS96°78°
Chance Showers And Thunderstorms
- Precipitation
- 46%
- Wind
- SW 5 mph
- Sunrise
- 6:33 AM
- Sunset
- 7:35 PM
Mon
95°78°
Sunny then Chance Showers And Thunderstorms
- Precipitation
- 46%
- Wind
- W 5 mph
- Sunrise
- 6:33 AM
- Sunset
- 7:34 PM
Tue
93°77°
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
- Precipitation
- 66%
- Wind
- NW 5 mph
- Sunrise
- 6:34 AM
- Sunset
- 7:33 PM
Wed
95°77°
Sunny then Showers And Thunderstorms Likely
- Precipitation
- 55%
- Wind
- SW 0 to 5 mph
- Sunrise
- 6:34 AM
- Sunset
- 7:32 PM
Thu
93°75°
Showers And Thunderstorms Likely
- Precipitation
- 67%
- Wind
- SW 0 to 5 mph
- Sunrise
- 6:35 AM
- Sunset
- 7:30 PM
Fri
93°75°
Chance Showers And Thunderstorms
- Precipitation
- 49%
- Wind
- W 0 to 5 mph
- Sunrise
- 6:36 AM
- Sunset
- 7:29 PM
Sat
93°76°
Slight Chance Rain Showers then Chance Showers And Thunderstorms
- Precipitation
- 31%
- Wind
- NE 0 to 5 mph
- Sunrise
- 6:36 AM
- Sunset
- 7:28 PM
Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.
Weather for a healthier day
Healthy Weather
Real Feel114°F
Walking is not recommended now
Review the active Special Marine Warning before going outside. MyUSA.us will not recommend this activity while an NWS watch, warning, or emergency is active.
WindS5 mph
Best walk timeReview the active Special Marine Warning before leaving
MyUSA.us will not recommend an outing window while an NWS watch, warning, or emergency is active. Follow the official alert and local instructions.
Official EPA AirNowLocal air qualityMandeville, Louisiana 70448View AQI +
More weather details
Wind gustsNot reported
Rain now44%next hour
Humidity55%current
UV indexCheckingEPA forecast
Wind impact: Light wind with little expected outdoor impact.
“Better weather window” is planning guidance based on official NWS data—not a promise of safe conditions. Review active alerts and radar before leaving.
Storm & DetailsGusts, pressure, visibility and official risk outlooksView details +
Wind gustNot reported
Pressure29.93 in
Visibility10.0 mi
Peak rain chance46%
Dew point77°F
Active alerts2
Official risk outlooks
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Stay weather-ready
Active NWS alerts
Severe · Immediate
Special Marine Warning
Applies to: Lake Maurepas; Lake PontchartrainIssued by: NWS New Orleans LASpecial Marine Warning issued August 23 at 4:53PM CDT until August 23 at 6:15PM CDT by NWS New Orleans LAAlert details
For the following areas... Lake Maurepas... Lake Pontchartrain... At 453 PM CDT, a cluster of severe thunderstorms were located along a line extending from 6 nm southwest of Lake Maurepas to near Manchac to near Madisonville, moving southeast at 25 knots. HAZARD...Wind gusts in excess of 50 knots and small hail. SOURCE...Radar indicated. IMPACT...Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. Locations impacted include... Madisonville, Manchac, Lake Pontchartrain/Lake Maurepas, Orleans Marina, Lake Maurepas, Mandeville, The Mid Point Of The Causeway Bridge, Kenner, and Lacombe.Safety instructions
Dangerous high winds and suddenly higher waves are expected! Seek shelter or move to safe harbor immediately! Boaters should seek safe harbor immediately until these storms pass. Wind gusts in excess of 50 knots, small hail, high waves, dangerous lightning, and heavy rain are possible with these storms.Moderate · Expected