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They cover the North Atlantic Ocean from the west coast of Europe to the U.S. and Canadian east coasts, and the North Pacific Ocean from the U.S. and Canadian west coast to the east coast of Asia. OPC weather forecasts and warnings for these areas primarily ensure the safety of ocean-crossing commercial ships and other vessels on the high seas.
The Azores High also known as North Atlantic (Subtropical) High/Anticyclone or the Bermuda-Azores High, is a large subtropical semi-permanent centre of high atmospheric pressure typically found south of the Azores in the Atlantic Ocean, at the Horse latitudes. It forms one pole of the North Atlantic oscillation, the other being the Icelandic Low.
Map of Sea Areas and Coastal Weather Stations referred to in the Shipping Forecast. The 31 sea areas covered in the forecast are as shown in this table and map. [12] The forecast follows the order shown, going clockwise around the British Isles, with each area except Trafalgar, Irish Sea, Shannon, and Fair Isle bordering the previous.
A subtropical depression could form in the Atlantic in the next several days, with a tropical depression also likely to form in the Caribbean Sea by early next week, forecasters said.
The Atlantic Ocean, Caribbean Sea and now Gulf of Mexico are crowded with possible storm activity as a fifth tropical system is being closely watched by forecasters Thursday afternoon.
A disturbance near the Windward Islands, and another system in the far eastern Atlantic, could see some development by early next week, forecasters said.
To help shorten the length of the forecast products, single words and phrases are used to describe areas out at sea. Experimental gridded significant wave height forecasts began being produced by the Ocean Prediction Center in 2006, a first step toward digital marine service for high seas and offshore areas.
The North Atlantic Oscillation (NAO) is a weather phenomenon over the North Atlantic Ocean of fluctuations in the difference of atmospheric pressure at sea level (SLP) between the Icelandic Low and the Azores High.