St. John The Baptist-
Including the cities of Laplace and Reserve
1111 PM CDT Sat Aug 15 2026

...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM CDT SUNDAY...
...EXTREME HEAT WATCH IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...

.REST OF TONIGHT...Clear. Lows in the upper 70s. Southwest winds
around 5 mph.
.SUNDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Humid with highs in the upper 90s. Northwest winds
around 5 mph, becoming south in the afternoon. Chance of rain
20 percent. Heat index values up to 114.
.SUNDAY NIGHT...Partly cloudy in the evening, then becoming
mostly clear. Humid with lows in the upper 70s. Southwest winds
around 5 mph. Heat index values up to 110 early in the evening.
.MONDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Humid with highs in the upper 90s. West winds
around 5 mph. Chance of rain 20 percent. Heat index values up to
115.
.MONDAY NIGHT...Mostly clear. Humid with lows in the upper 70s.
Southwest winds around 5 mph. Heat index values up to 107 early
in the evening.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the upper
90s. Lows in the upper 70s. Heat index values up to 115.
.WEDNESDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.
Heat index values up to 110.
.WEDNESDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 70s. Heat index values up to 105 early in the
evening.
.THURSDAY...Sunny with a slight chance of showers and
thunderstorms. Highs in the upper 90s. Chance of rain 20 percent.
Heat index values up to 110.
.THURSDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows in the upper 70s. Heat index values up to 105 early in the
evening.
.FRIDAY...Sunny. A chance of showers and thunderstorms in the
afternoon. Highs in the upper 90s. Chance of rain 30 percent.
Heat index values up to 110.
.FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows
in the upper 70s. Heat index values up to 105 early in the
evening.
.SATURDAY...Sunny. A slight chance of showers and thunderstorms
in the morning, then a chance of showers and thunderstorms in the
afternoon. Highs in the mid 90s. Chance of rain 30 percent. Heat
index values up to 110.