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

82°F

28°C

Humidity	78%
Wind Speed	Calm
Barometer	29.97 in
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	17 Aug 8:55 pm CDT

More Information:

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

Extended Forecast for

4 Miles WSW Grand Isle LA

Tonight
Low: 83 °F
Partly Cloudy
Monday
High: 89 °F
Chance
T-storms
Monday Night
Low: 82 °F
Partly Cloudy
then Slight
Chance
T-storms
Tuesday
High: 89 °F
Chance
T-storms
Tuesday Night
Low: 81 °F
Mostly Clear
then Slight
Chance
T-storms
Wednesday
High: 88 °F
Chance
T-storms
Wednesday Night
Low: 82 °F
Mostly Clear
then Slight
Chance
T-storms
Thursday
High: 88 °F
Chance
T-storms
Thursday Night
Low: 81 °F
Chance
T-storms

Detailed Forecast

Tonight

Partly cloudy, with a low around 83. West wind around 5 mph becoming north after midnight.

Monday

A 30 percent chance of showers and thunderstorms, mainly between 10am and 3pm. Mostly sunny, with a high near 89. North wind around 5 mph becoming east in the afternoon.

Monday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 82. Southeast wind around 5 mph becoming calm.

Tuesday

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

Tuesday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 81. Southeast wind around 5 mph becoming north after midnight.

Wednesday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Sunny, with a high near 88. North wind around 5 mph becoming southeast in the afternoon.

Wednesday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 82. South wind around 5 mph becoming southwest after midnight.

Thursday

A 40 percent chance of showers and thunderstorms. Sunny, with a high near 88. West 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 81. South wind around 5 mph.

Friday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Southwest wind around 5 mph.

Friday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Southwest wind around 5 mph.

Saturday

Showers and thunderstorms likely. Mostly 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 80. Southwest wind around 5 mph.

Sunday

Showers and thunderstorms likely. Mostly sunny, with a high near 87. Northwest wind around 5 mph becoming southwest in the afternoon.