Dangerous heat and humidity remain the primary weather concern across Northeast Florida and Southeast Georgia Monday, with another round of afternoon thunderstorms possible later in the day.
A Heat Advisory is in effect across most of the region from 11 a.m. until 8 p.m. An Extreme Heat Warning has been issued for Glynn and Camden counties in Southeast Georgia, where the combination of heat and humidity will become especially dangerous.
Afternoon temperatures will climb into the mid and upper 90s, but it will feel considerably hotter. Peak heat index values are expected to reach between 108 and 115 degrees across the area.
Jacksonville will reach a high near 96 degrees, with mostly sunny skies through the first half of the day. Scattered showers and thunderstorms are expected to develop mainly after 2 p.m., with rain coverage around 40%. Winds will come from the west at 7 to 11 mph, with occasional gusts up to 15 mph.
Any thunderstorms that develop could produce frequent lightning, locally heavy rain and gusty winds. The storms will remain scattered, meaning not everyone will receive rain or relief from the heat.
Storm coverage will gradually decrease Monday evening, with most activity ending before 8 p.m. Overnight temperatures will only fall into the upper 70s, offering limited relief from the oppressive humidity.
Tuesday could be even hotter. Jacksonville is forecast to reach 97 degrees, with heat index values as high as 112 degrees. Showers and thunderstorms will become more numerous late in the afternoon and evening, with rain chances increasing to approximately 60%. Gusty southwest winds could reach 20 mph.
High temperatures remain near 97 degrees Wednesday and Thursday. Storm coverage drops to around 40% Wednesday and 20% Thursday, allowing the dangerous heat to remain the dominant weather story.
Rain chances increase again Friday and continue through the weekend. Scattered afternoon thunderstorms are expected Friday, followed by daily rain chances around 40% Saturday and Sunday. Temperatures will gradually ease into the lower to middle 90s, but the humidity will remain high.
Anyone spending time outside should drink plenty of water, take frequent breaks in the shade or air conditioning and wear lightweight, light-colored clothing. Outdoor activity should be limited during the hottest portion of the afternoon. Never leave children or pets inside a parked vehicle, even for a short period of time.