Question : When an active cold front overtakes a warm front, A) the fronts cancel : 2146537
19) When an active cold front overtakes a warm front, ________.
A) the fronts cancel one another out
B) an occluded front forms
C) cloud formation ceases
D) a stationary front is created
20) You are in mid-latitudes in winter. You experience heavy snow followed by a dramatic drop in temperature as a cold front passes, but for almost 24 hours the weather is clear. Then, high clouds appear in the west, thicken to stratus clouds and you receive a light new snowfall (aka snow flurries) but the temperature remains cold. You have just seen the passage of ________.
A) an occluded front
B) a stationary front
C) a second cold front
D) a warm front
24) Norwegians originally named weather fronts as analogous to fronts of ________.
A) animal herds
C) ocean waves
25) Because surface winds circulate around a midlatitude cyclone, why do they move from west to east across North America?
A) The storm is forced toward the warm arm mass, which "pulls" the storm toward it to the east.
B) The Bermuda high in the Atlantic ocean forces circulation it, which steers the storm systems in North America.
C) The continental polar air mass that "pushes" the cold front drive the storm east.
D) The winds aloft, particularly the jet stream, move from west to east and steer the storm system.
26) TV meteorologists often point at things labeled L on a map and describe them as low pressure centers. What are they?
A) severe weather systems with tornadoes
B) low level pressure centers, hence the term L
C) midlatitude cyclones
D) low pressure centers that are mini-equivalents of hurricanes
28) When the center of circulation of a midlatitude cyclone just passes to your south, you expect ________.
A) winds shifting from the east or northeast to northwest during rainy (or snowy) weather
B) a constantly rising barometer until the cyclone passes then falling barometer
C) warming conditions during light to moderate rain with a falling barometer followed by a northwest wind and rising barometer
D) winds shifting from the south or southeast to the west or northwest with abrupt cooling at the passage of a cold front
29) Midlatitude anticyclones are typically centered on ________.
A) a maritime tropical air mass
B) a continental polar air mass
C) a continental tropical air mass
D) a maritime polar air mass
30) Where is the most severe weather typically located in a midlatitude cyclone?
A) just south of the center of circulation
B) just north of the center of circulation
C) on the warm front preceding the center of circulation
D) on the trailing cold front, south or west of the center of circulation
31) Consider the below diagram of a pair of fronts associated with a mid-latitude cyclone.
What is true of this diagram?
A) The rain in the front on the left will end sooner.
B) The front on the left is a warm front.
C) The front on the right has an easier time wedging ambient air out of the way.
D) The front on the right is faster moving.
32) Thunderstorms form from what type of cloud?