Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Fair

77°F

25°C

Humidity	89%
Wind Speed	NW 3 mph
Barometer	29.93 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	18 Aug 3:15 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

9 Miles SSW Port Sulphur LA

Overnight
Low: 81 °F
Mostly Clear
Monday
High: 90 °F
Mostly Sunny
Monday Night
Low: 80 °F
Partly Cloudy
Tuesday
High: 89 °F
Chance
T-storms
Tuesday Night
Low: 80 °F
Slight Chance
T-storms
Wednesday
High: 89 °F
Chance
T-storms
Wednesday Night
Low: 80 °F
Slight Chance
T-storms
Thursday
High: 88 °F
Chance
T-storms
Thursday Night
Low: 80 °F
Chance
T-storms

Detailed Forecast

Overnight

Mostly clear, with a low around 81. North wind around 5 mph.

Monday

Mostly sunny, with a high near 90. Heat index values as high as 105. North wind around 5 mph becoming southeast in the afternoon.

Monday Night

Partly cloudy, with a low around 80. South wind around 5 mph becoming calm in the evening.

Tuesday

A 30 percent chance of showers and thunderstorms, mainly after 10am. Mostly sunny, with a high near 89. Northeast wind 5 to 10 mph.

Tuesday Night

A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 80. East wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

Wednesday

A 40 percent chance of showers and thunderstorms, mainly before 4pm. Sunny, with a high near 89. North wind around 5 mph becoming southeast in the afternoon.

Wednesday Night

A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 80. Southeast wind around 5 mph becoming west after midnight. Chance of precipitation is 20%.

Thursday

A 40 percent chance of showers and thunderstorms, mainly after 7am. Sunny, with a high near 88. Northwest wind around 5 mph becoming south in the afternoon.

Thursday Night

A chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 80. South wind around 5 mph.

Friday

Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 87. South wind around 5 mph.

Friday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 79. South wind around 5 mph.

Saturday

Showers and thunderstorms likely. Partly sunny, with a high near 87. West wind around 5 mph.

Saturday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 78. Southwest wind around 5 mph.

Sunday

Showers and thunderstorms likely. Mostly sunny, with a high near 87. West wind around 5 mph.