Synopsis...
High Pressure Will Build Into The Eastern United States Behind A Departing Low Pressure System Tonight Through Tuesday. A Large Low Pressure Area Will Develop Over The Mid Mississippi Valley On Thursday, With A Strong Cold Front Extending Southward Into The Gulf Of Mexico. This Front Will Likely Blast Through The Coastal Waters Of The Florida Keys Late Thursday Or Thursday Night. The Approximate Shoreward Edge Of The Gulf Stream As Of December 15... 40 Nm South Of Dry Tortugas Light...On Loggerhead Key. 18 Nm South Of Cosgrove Shoal Light...Off The Marquesas Keys. 11 Nm South Of Sand Key Light...Off Key West. 11 Nm South Of Looe Key...Off Big Pine Key. 14 Nm South Of Sombrero Key Light...Off Marathon. 7 Nm Southeast Of Alligator Reef Light...Off Islamorada. 2 Nm Southeast Of Molasses Reef Light...Off Key Largo. 2 Nm East Of Carysfort Reef Light...Off Ocean Reef. Gulf Stream Information Courtesy Of The Naval Oceanographic Office.

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