Southeast St. Tammany-Southwestern St. Tammany- Including the cities of Slidell, Mandeville, and Madisonville 731 PM CDT Sun Mar 15 2026 ...WIND ADVISORY REMAINS IN EFFECT FROM 4 AM TO 7 PM CDT MONDAY... ...FREEZE WATCH IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY MORNING... .TONIGHT...Mostly cloudy with a chance of thunderstorms. A chance of showers this evening, then showers after midnight. Much cooler with lows in the mid 40s. Southwest winds 10 to 15 mph, becoming northwest 15 to 20 mph after midnight. Gusts up to 35 mph. Chance of rain 90 percent. .MONDAY...Partly sunny with a slight chance of showers and thunderstorms in the morning, then sunny in the afternoon. Much cooler. Less humid with highs in the mid 50s. Northwest winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 20 percent. .MONDAY NIGHT...Mostly cloudy. Lows in the mid 30s. North winds 15 to 20 mph with gusts up to 30 mph, diminishing to 5 to 10 mph with gusts up to 20 mph after midnight. .TUESDAY...Sunny. Highs in the upper 50s. North winds 5 to 10 mph. .TUESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. Northeast winds around 5 mph. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the mid 70s. .THURSDAY NIGHT...Mostly clear. Lows in the mid 50s. .FRIDAY...Sunny. Highs in the lower 80s. .FRIDAY NIGHT THROUGH SUNDAY...Mostly clear. Lows around 60. Highs in the lower 80s.