Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend
Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >
| NWS Forecast for: Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM (GMZ055) Issued by: National Weather Service Key West, FL Last Update: 1030 PM EDT Thu Sep 17 2026 |  |
| Overnight: East winds 10 to 15 knots early, decreasing to near 10 knots. Seas 2 to 3 feet, subsiding to around 2 feet. Wave detail: east 3 feet at 5 seconds. Showers likely with a chance of thunderstorms. Friday: East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. Wave detail: east 2 feet at 5 seconds. Showers likely with a chance of thunderstorms. Friday Night: East winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: northeast to east 2 feet at 5 seconds. Showers likely with a chance of thunderstorms. Saturday: East to southeast winds near 5 knots. Seas around 1 foot. Showers likely with a chance of thunderstorms. Saturday Night: East to southeast winds 5 to 10 knots, becoming southeast to south. Seas 1 to 2 feet. Showers likely with a chance of thunderstorms. Sunday: South winds 5 to 10 knots. Seas 1 to 2 feet. Showers likely with a chance of thunderstorms. Sunday Night: South to southwest winds 5 to 10 knots. Seas 1 to 2 feet. Showers likely with a chance of thunderstorms. Monday: South to southwest winds 5 to 10 knots. Seas 1 to 2 feet. Showers likely with a chance of thunderstorms. Monday Night: Southeast winds 5 to 10 knots, increasing to near 10 knots. Seas 1 to 2 feet, building to around 2 feet. A chance of showers and thunderstorms. Tuesday: Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. Showers likely with a chance of thunderstorms. Tuesday Night: Southeast winds near 10 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. | |
| Zone Forecast: Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM (GMZ055) | |
Visit your local NWS office at: https://www.weather.gov/key |