Jacksonville, Florida – A surge of dangerous summer storms is set to sweep into Jacksonville on Sunday, bringing intense heat and the highest chance of thunderstorms this week. Residents near Jacksonville Naval Air Station and across Duval County should brace for storms after 11 a.m., as heat index values soar to 109° — making outdoor plans risky and raising concerns for power outages and travel on key routes like Roosevelt Boulevard.
According to the National Weather Service, Sunday’s forecast calls for mostly sunny skies in the morning before scattered showers and thunderstorms roll in after 11 a.m. The high will hit 94°, with a 70% chance of rain and gusty winds that could disrupt travel and outdoor activities. South winds around 7 mph may bring localized flooding in low-lying areas and ponding on busy roadways.
Stay weather-aware: avoid non-essential travel during heavy downpours, especially on I-295 and Roosevelt Blvd, and ensure mobile devices are charged in case of outages. If you must be outdoors, hydrate often and take frequent breaks in the shade.
Storm chances remain high through the week. Monday continues the pattern, with a slight chance of morning showers before thunderstorms return after 11 a.m., keeping highs in the mid-90s. Showers and thunderstorms are likely every day through Thursday, with nighttime lows in the mid-70s.
