Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Current conditions at

Galliano, South Lafourche Airport (KGAO)

Lat: 29.44°NLon: 90.26°WElev: 0ft.

Partly Cloudy

85°F

29°C

Humidity	76%
Wind Speed	N 9 mph
Barometer	29.99 in
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	95°F (35°C)
Last update	3 Aug 10:15 am CDT

More Information:

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

Extended Forecast for

Grand Isle LA

Today
High: 85 °F
Showers
Likely then
T-storms
Likely
Tonight
Low: 85 °F
T-storms
Likely
Monday
High: 84 °F
T-storms
Monday Night
Low: 81 °F
Chance
T-storms then
T-storms
Tuesday
High: 87 °F
T-storms
Tuesday Night
Low: 82 °F
Chance
T-storms
Wednesday
High: 88 °F
T-storms
Wednesday Night
Low: 81 °F
Slight Chance
T-storms then
Chance
T-storms
Thursday
High: 88 °F
T-storms

Detailed Forecast

Today

Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a steady temperature around 85. North wind around 5 mph becoming west in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a steady temperature around 85. West wind around 5 mph becoming north after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Showers and thunderstorms likely before 7am, then showers and possibly a thunderstorm between 7am and 1pm, then showers and thunderstorms after 1pm. Steady temperature around 84. Northwest wind around 5 mph becoming south in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 81. Southwest wind around 5 mph becoming east in the evening. Chance of precipitation is 80%.

Tuesday

Showers and possibly a thunderstorm before 10am, then showers and thunderstorms, mainly after 10am. High near 87. Southwest wind around 5 mph becoming south in the afternoon. Chance of precipitation is 90%.

Tuesday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 82. South wind around 5 mph.

Wednesday

Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. High near 88. Southwest wind around 5 mph. Chance of precipitation is 80%.

Wednesday Night

A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 81. Southwest wind around 5 mph.

Thursday

Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly 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 81. Southwest wind around 5 mph.

Friday

Showers and thunderstorms likely. Sunny, with a high near 88. Northwest wind around 5 mph becoming southeast in the afternoon.

Friday Night

A chance of showers and thunderstorms. Mostly clear, with a low around 82. Southeast wind around 5 mph.

Saturday

Showers and thunderstorms likely. Sunny, with a high near 88. East wind around 5 mph.