The most important trigger for cyclogenesis is
A) short-waves in the jet stream.
B) mountain barriers.
C) a weak temperature gradient.
D) the presence of a front.
E) none of the above
Question 2Which of the following can trigger cyclogenesis?
A) mountain barriers
B) temperature gradients
C) a strong jet stream
D) all of the above
E) none of the above
Question 3Which occurs last?
A) fully developed warm front
B) cut-off cyclone
C) occluded cyclone
D) open wave
E) fully developed cold front
Question 4Which occurs first?
A) fully developed warm front
B) cut-off cyclone
C) occluded cyclone
D) open wave
E) fully developed cold front
Question 5A cut-off cyclone
A) has well-developed fronts.
B) has dissipating clouds.
C) features heavy precipitation.
D) is the initial stage of extratropical cyclone development.
E) is rarely found over North America.
Question 6The most intense extratropical cyclones have lows of about ____ mb.
A) 870
B) 910
C) 960
D) 990
E) 1010
Question 7A frontal wave near the center of North America typically separates ____ and ____ air masses.
A) cT, mP
B) A, mP
C) mP, mT
D) mT, cP
E) cP, mP
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