Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Hazardous Weather Conditions

Small Craft Advisory in effect from December 30, 03:00 AM CST until December 31, 06:00 AM CST

Last Update: 326 AM EST Mon Dec 29 2025

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Miami - South Florida Local Forecast Office

11NM W Marco Island FL

Marine Zone Forecast

Today

NW winds around 5 kt, becoming W this afternoon. Seas less than 2 ft or less. Bay and inland waters light chop.

Tonight

NW winds 5 to 10 kt, increasing to 15 to 20 kt after midnight. Seas less than 2 ft or less, then 2 to 3 ft after midnight. Wave detail: NW 1 foot at 3 seconds, becoming NW 3 ft at 4 seconds. Bay and inland waters a moderate chop.

Tue

N winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft, occasionally to 8 ft. Wave detail: NW 6 ft at 7 seconds and NW 4 ft at 4 seconds. Bay and inland waters a moderate chop.

Tue Night

N winds 15 to 20 kt. Seas 4 to 6 ft, occasionally to 8 ft. Wave detail: NW 6 ft at 7 seconds. Bay and inland waters a moderate chop.

Wed

N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 3 to 5 ft, occasionally to 6 ft. Wave detail: NW 4 ft at 7 seconds and NE 2 ft at 4 seconds. Bay and inland waters a moderate chop.

Wed Night

N winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: NW 3 ft at 6 seconds. Bay and inland waters light chop.

Thu Through Fri

S winds 5 to 10 kt. Seas around 2 ft. Bay and inland waters light chop.