Unformatted text preview: velocity, high altitude winds flowing west to east Low-pressure systems off the Eastern Pacific Ocean moved onshore Air Masses: air mass with characteristic temp & H2O content Fronts Air masses with different temperatures and water contents do not mix easily. Boundary is called a FRONT Cold front Warm front Occluded or stationary front Hurricanes Hurricanes are Tropical Cyclones Transfer heat from warm tropics toward the poles Source of heat is warm ocean water, and release of latent heat What latitudes do they form between? Conditions Favoring Hurricane Formation Warm ocean water (>80 F) Usually occurs in late summer/fall Upper 200' of water column warm Warm, moist air mass Weak high-altitude winds Hurricane development Begins as a low pressure tropical disturbance of thunderstorms Develops into a rotating cyclonic tropical depression Strengthens into a tropical storm Becomes a hurricane when sustained winds reach 74 mph and central eye develops Cape Verde-type Hurricanes in the North Atlantic Ocean Begin as low-pressure storms over Northern Africa Moved west, 5-20 N of the equator, by the Tradewinds Location & strength of Bermuda High influences hurricane paths I.e. Hurricanes Andrew and Isabel, 2004 season Car...
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- Fall '11
- Precipitation, Tropical cyclone, Atlantic Ocean, High Pressure, low pressure