Mostly cloudy skies and muggy air are greeting New Orleans early Monday, but the bigger story will arrive by midday. Temperatures are expected to climb into the 90s before afternoon thunderstorms develop, with the heat index reaching as high as 111.
Heat Advisory Runs Through Monday Evening
The National Weather Service in New Orleans has issued a Heat Advisory from 11 a.m. to 7 p.m. Monday, warning that dangerous heat and humidity could cause heat-related illness, according to the National Weather Service. The high is expected to reach about 94 degrees before slipping toward the lower 90s later in the afternoon.
Showers and thunderstorms may begin after 11 a.m., with a 30% chance of rain overall. The strongest cells could produce frequent lightning, sudden wind gusts and brief heavy rain, while repeated downpours may cause localized flooding in poor-drainage areas.
The timing marks a sharper same-day update from Hoodline's earlier Labor Day forecast, which focused on holiday-weekend storm chances but did not include the new advisory. Outdoor plans may be manageable early, but conditions will become more hazardous during the hottest part of the afternoon.
Storm Chances Increase Tuesday Through Thursday
Monday night will remain warm, with a low near 79 and heat-index values still potentially reaching 105. Tuesday brings a high near 90 and a 60% chance of showers and thunderstorms, with rain possible as early as the morning.
The wet pattern becomes more persistent Wednesday and Thursday, when daily rain chances rise to about 80% and highs stay near 89. Storms could bring locally heavy rain, especially in urban areas where water can collect quickly.
Residents should drink plenty of fluids, take breaks in air conditioning or shade, and limit strenuous outdoor activity during the advisory period. Anyone who hears thunder should move indoors, while people checking on older neighbors, children, outdoor workers or anyone without reliable cooling should do so before the afternoon heat peaks.
