ATOC 1050 chapter 10 notes

ATOC 1050 chapter 10 notes - Chapter 10 Extratropical...

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Chapter 10 – Extratropical Cyclones Forming along the East and Gulf Coasts ATOC 1050 I. East and Gulf coast extratropical cyclones A. Form mostly from late fall to early spring B. “Coastal cyclones have the greatest economic impact of any storm type on the northeast and Canada (southeast Canada?), even more than hurricanes” (pg. 172). 1. Greatest impact is from Boston, Mass. To Washington, D.C. (Why? – consider the cost of real estate in this area and population density) 2. Snow, floods, cold, and high winds do most of damage C. Coastal cyclones form either offshore near: Cape Hatteras, NC or Texas-Louisiana border 1. These cyclones are often more intense than those that formed in eastern Colorado mainly because of: 1
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a. increased moisture and the resulting latent heat of condensation. b. sensible heat from Atlantic Ocean or Gulf of Mexico c. strong temperature contrast between land and water d. this area can be under the influence of both the polar and subtropical jets – thus more than one jet streak. II. Development of East coast cyclones which are also called “bombs” because of there “explosive” formation (form very quickly). These usually become Nor’easters as they travel up the East coast of the USA. Formation of a “bomb”: 2
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See pg. 174 in your text for an explanation of each of the maps. Basically, A, B, and C are surface maps and D, E, and F are the upper air maps that match the surface maps (A and D go together, B and E, and C and F.) 3
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A. East coast cyclones usually form near the time that a Rocky Mountain cyclone approaches after the passage of a cyclone formed in eastern Colorado OR after an older cyclone has progressed into Canada and is beginning to dissipate. B. The Rocky Mountain storm (first storm) is supplying the cold air behind its cold front. C. The polar jet is across the central Atlantic
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This note was uploaded on 05/03/2008 for the course ATOC 1050 taught by Professor Forrest,be during the Spring '06 term at Colorado.

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ATOC 1050 chapter 10 notes - Chapter 10 Extratropical...

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