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Pacific storm track
The Pacific storm track is the band over the North Pacific where migrating cyclones and anticyclones are most active, supplying much of western North America's winter weather.
Pineapple Express
The Pineapple Express is an atmospheric river carrying tropical moisture from near Hawaii to the west coast of North America, bringing heavy rain and snow.
Southern Annular Mode
The Southern Annular Mode, also called the Antarctic Oscillation, is the leading pattern of Southern Hemisphere climate variability, a north-south shift of the westerly winds circling Antarctica.