Exam 10: Hurricanes and Extratropical Cyclones
Extratropical cyclones are rarer than tropical cyclones and an extratropical cyclone has not been seen in the U.S. in over 100 years.
False
Describe the development of the extratropical cyclone.
Two key ingredients contribute to the formation and movement of an extratropical cyclone-a strong temperature gradient in the air near the surface and wind patterns within the jet stream. Surface temperature gradients are generally strongest along a cold, warm, or stationary front . Therefore, most extratropical cyclones develop along fronts. Air masses, moving in opposite directions along a front provide the temperature contrast for cyclone development; a wave forms along the front at a place where upper-level winds diverge, such as a bend in the jet stream; a surface low-pressure center develops as cold air pushes south on the west side and warm air pushes north on the east side of the cyclone; the cold front advances faster than the warm front, catches up with the warm front, and displaces the warm air upward; an occluded front develops with warm air held aloft by cold and cool air masses at the surface; the temperature contrast at the surface disappears, friction slows winds, and atmospheric pr as the cyclone dissipates.
Describe the stages of development of a hurricane starting with a tropical disturbance.
Extratropical cyclones usually don't have wind or storm surge associated with them.
Which of the following will NOT affect the amount of storm surge on a coastline?
Which of the following is NOT a way in which communities should prepare for a hurricane?
What are the similarities and differences between a tropical and extratropical cyclone?
Names for especially deadly or damaging hurricanes, like Hurricane Katrina, are retired and never will be used again.
Weather satellites can give information about the early signs of hurricane formation, but can't show wind speed directly.
Just like in the case of an earthquake, people in hurricane-prone areas should have emergency supplies and should make a family plan.
Tropical disturbances for the Atlantic Ocean are caused by easterly waves off of the coast of Africa.
When is hurricane season for the Eastern and Gulf Coasts of the U.S.?
Which of the following may NOT necessarily increase with increasing category on the Saffir-Simpson scale?
Weather buoys are an outdated source of weather information that are not used currently.
People who have experienced hurricanes are usually more likely to take appropriate action than those who have not.
Hurricanes in the North Atlantic Ocean initially go from East to West due to the prevailing winds, the Trade Winds. Why do they then turn Northward?
What is different about an extratropical cyclone as compared to a tropical cyclone?
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