Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Slidell, Slidell Airport (KASD)

Lat: 30.34° N Lon: 89.82° W Elev: 30 ft.

Overcast

85°F

29°C

Humidity 77%
Wind Speed S 12 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 17 Jun 4:53 pm CDT
Detailed forecast for

Southwestern St. Tammany

This Afternoon
Mostly cloudy with a chance of showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature in the mid 80s. South winds 10 to 15 mph. Chance of rain 40 percent.
Tonight
A chance of thunderstorms. Showers likely in the evening, then showers after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Humid with lows in the upper 70s. South winds around 15 mph with gusts up to 25 mph. Chance of rain 90 percent.
Thursday
Showers likely with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Humid with highs in the upper 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 70 percent. Heat index values up to 107.
Thursday Night
Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Humid with lows around 80. South winds 10 to 15 mph. Chance of rain 40 percent.
Juneteenth
Mostly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. South winds 5 to 10 mph. Chance of rain 60 percent. Heat index values up to 112.
Friday Night And Saturday
Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 70s. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 110.
Saturday Night
Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the upper 70s. Chance of rain 20 percent.
Sunday
Mostly sunny. Highs in the lower 90s. Heat index values up to 110.
Sunday Night Through Monday Night
Mostly clear. Lows in the upper 70s. Highs in the mid 90s. Heat index values up to 110.
Tuesday
Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 110.



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121 PM CDT Wed Jun 17 2026
 
 

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