Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Last Update: 513 AM EDT Tue Aug 18 2026

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Key West, FL Local Forecast Office

16NM NNW Vaca Cut FL

Marine Zone Forecast


Today
North winds near 5 knots, becoming northwest 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth, becoming smooth to a light chop.
Tonight
Northwest winds 10 to 15 knots, becoming 5 to 10 knots. Seas around 1 foot. Nearshore waters a light to moderate chop, becoming smooth to a light chop.
Wednesday
Northwest winds 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a light chop.
Wednesday Night
Northwest winds 10 to 15 knots, becoming 5 to 10 knots. Seas around 1 foot. Nearshore waters a light to moderate chop, becoming smooth to a light chop. A slight chance of showers and thunderstorms.
Thursday
West winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms.
Thursday Night
West winds near 5 knots, becoming southeast to south. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms.
Friday
South to southwest winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth.
Friday Night
Southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers.
Saturday
South winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms.
Saturday Night
Southeast winds near 5 knots. Seas 1 foot or less. Nearshore waters smooth. A slight chance of showers and thunderstorms.



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513 AM EDT Tue Aug 18 2026
 
 

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