Jacksonville Weather Alert: Severe Storms and Temperature Swings—What to Expect This Week

Jacksonville residents will need umbrellas and patience as December opens with a soaking start. A slow-moving front is funneling Gulf moisture into Northeast Florida, pushing Monday afternoon highs to about 69 °F while showers and isolated thunderstorms roll across Duval County. Meteorologists warn that a few storms could turn strong, delivering 30–40 mph gusts and brief street flooding during the evening commute. What to expect today • Peak rain window: 2 p.m.–8 p.m. • Rain chance: 70 % with locally 1″–2″ totals. • Winds: Northeast 10–15 mph, backing southwest late. • Marine alert: Choppy intracoastal waters; seas 3–5 ft. Temperature roller coaster Warm southwest flow Tuesday will spike temperatures near 76 °F before a sharp cold front sweeps in overnight, dragging lows to the upper 40s by Wednesday morning. The mid-week chill is brief; readings rebound into the lower 70s Friday before another front arrives this weekend. Seven-day Jacksonville forecast (high/low) Mon 69/57 – wet, a few storms Tue 76/50 – windy early, clearing Wed 62/45 – sunny, cooler Thu 66/45 – mostly sunny Fri 72/53 – increasing clouds Sat 68/49 – showers, late storms Sun 65/47 – breezy, drier Why this rain matters November ended 1.8″ below normal at JAX airport, so today’s downpour will chip away at the month-long deficit while reducing the wildfire risk across inland Nassau, Baker and Clay counties. Commuter tips 1. Allow an extra 10–15 minutes; ponding likely on I-95 near the Fuller Warren Bridge. 2. Activate low-beam headlights; visibility could drop below 1 mile in heavier squalls. 3. Check JTA bus alerts for weather-related detours. Weekend outlook Another Pacific-borne storm should arrive late Friday, powering a line of thunderstorms Saturday afternoon. Early model guidance hints at small hail and damaging wind potential, so stay weather-aware and keep the First Alert Weather app handy. Beach & boating Surf builds to 4–6 ft Monday evening with a moderate rip-current threat. Atlantic seas settle below 3 ft by Wednesday, offering a mid-week fishing window before the next front. Bottom line Jacksonville weather is kicking off December with classic Sunshine-State whiplash: drenching rain today, sweatshirt weather mid-week and another round of storms by Saturday. Keep rain gear close, layer up for the mid-week chill, and check the forecast frequently to stay a step ahead of Florida’s fast-changing skies.