A high pressure system building southward from the Central Plains will send a wind surge through the Florida Keys tonight. Fresh to strong north to northeast breezes will develop across the Keys coastal waters tonight...and prevail through the weekend. The approximate shoreward edge of the Gulf Stream as of November 19... 23 nm south of Dry Tortugas light...on Loggerhead Key. 5 nm south of Cosgrove Shoal light...off the Marquesas Keys. 5 nm south of Sand Key light...off Key West. 7 nm south of Looe Key...off Big Pine Key. 8 nm south of Sombrero Key light...off Marathon. 8 nm southeast of Alligator Reef light...off Islamorada. 9 nm southeast of Molasses Reef light...off Key Largo. 8 nm east of Carysfort Reef light...off Ocean Reef. Gulf Stream information courtesy of the naval oceanographic office.

Mostly north winds near 10 knots early...increasing to 20 to 25 knots. Seas beyond the reef around 2 feet...building to 4 to 8 feet. Seas higher in the Gulf Stream. Seas inside the reef 1 to 2 feet...building to 2 to 4 feet. Nearshore waters a light chop...becoming very rough.

Northeast winds 20 to 25 knots. Seas beyond the reef 5 to 9 feet...except higher in the Gulf Stream. Seas inside the reef 2 to 4 feet. Nearshore waters very rough. Isolated showers.

Northeast to east winds near 20 knots. Seas beyond the reef 5 to 8 feet...except higher in the Gulf Stream. Seas inside the reef 2 to 3 feet. Nearshore waters rough. Isolated showers.

Northeast to east winds 15 to 20 knots. Seas beyond the reef 4 to 7 feet...except higher in the Gulf Stream. Seas inside the reef 2 to 3 feet. Nearshore waters choppy. Isolated showers.

Northeast winds 10 to 15 knots. Seas beyond the reef 2 to 4 feet...except higher in the Gulf Stream. Seas inside the reef 1 to 2 feet. Nearshore waters a light to moderate chop. Isolated showers.

North winds near 15 knots. Seas beyond the reef 3 to 5 feet...except higher in the Gulf Stream. Seas inside the reef around 2 feet. Nearshore waters a moderate chop.