Meteorology 1010 Homework 5

Transcription

1 Meteorology 1010 Homework 5 Name: 1) On a weather map, fronts are shown with blue triangular points along a blue line. A) cold B) stationary C) occluded D) warm 2) A warm front is said to exist when: A) advancing warm air overrides retreating cold air. B) moving cold air overrides warmer air. C) warm air pushes underneath cold air. D) warm and cold air meet. E) invading cold air pushes underneath warmer air. 3) Which of these is common to both cold and warm fronts? A) divergence of surface winds B) light to calm winds C) lifting of warm air over cold D) decreasing precipitation rates E) steady barometer readings 4) The cloud type most frequently associated with a cold front is: A) cirrus. B) cumulonimbus. C) altocumulus. D) status. E) cirrocumulus. Page Ref: 243

2 5) Which of the stations listed below should have the highest temperature? A) point E B) point J C) point H D) point F E) point A Page Ref: 246 6) Rain long foretold, long last; short notice, soon past. The FIRST FIVE words of this weather proverb: A) refer to a warm front. B) refer to an anticyclone. C) refer to the formation of cumulonimbus clouds. D) have no basis in fact. E) refer to a cold front. Page Ref: 247 7) After a cold front passes, which of these does NOT usually occur? A) wind direction shift B) marked temperature drop C) drop in relative humidity D) clearing skies E) falling barometer Page Ref: 252 8) A blocking high is caused by: A) an occluded front. B) divergence in the upper atmosphere. C) a cutoff low. D) a persistent anticyclone. Page Ref: 257

3 Each of the statements refers to the approach or to the passage of a front. If the statement refers to the approach of a typical cold front, use the letter A for your answer. If the statement refers to the approach or passage of a typical warm front, use the letter B. If the statement applies to both, answer with letter C. 9) Severe thunderstorm/tornado 10) Cirrostratus clouds followed by altostratus 11) Pressure falls when front approaches 12) An "invading" cp air mass 13) The term cyclone is BEST defined as: A) a hurricane. B) a violent tornado. C) any circulation around a low-pressure center. D) a storm that develops over an ocean. Page Ref: ) Which of the following U.S. states experiences the most thunderstorms each year? A) Florida B) Texas C) Colorado D) Oklahoma Page Ref: ) Thunderstorms form when, humid air rises in a(n) environment. A) warm; stable B) cold; unstable C) warm; unstable D) cold; stable Page Ref: ) Generally there are three stages involved in the development of thunderstorms. They are: A) cumulus stage, mature stage, and dissipating stage. B) cumulus stage, mature stage, and deconstructing stage. C) cumulus stage, adolescent stage, and dissipating stage. D) cumulus stage, dissipating stage, and deconstructing stage. Page Ref: 272

4 17) Why are thunderstorms most likely to occur in the afternoon and early evening? A) Atmosphere is most unstable at that time. B) Upper-level winds are too fast at night and in morning. C) Water-vapor contents are too low at night. D) It takes all day for them to mature. E) Lower atmosphere is too unstable in the morning. Page Ref: ) Thunderstorm tops most likely occur: A) in the lower troposphere. B) in the middle stratosphere. C) in the mesosphere. D) near the tropopause. Refer to the diagram of a thunderstorm above to answer the following questions. 19) Where would you expect to find precipitation occurring in this thunderstorm? A) Letter A B) Letter B C) Letter D D) Letter E

5 20) The feature identified by Letter F is: A) a mammatus cloud B) a feature marking the downdraft C) an overshooting top D) a roll cloud 21) The feature identified by Letter F is most likely: A) the beginning of a new thunderstorm cell B) the sign of an intense downdraft C) in the mesosphere D) in the stratosphere 22) The feature identified by Letter D is: A) the gust front B) a cold front C) the storm's anvil D) experiencing very calm conditions 23) Where in the thunderstorm would you be most likely to find mammatus clouds? A) Letter C B) Letter D C) Letter E D) Letter F Page Ref: ) Which feature of the thunderstorm is created by the gust front? A) Letter A B) Letter D C) Letter C D) Letter F Page Ref: ) What does the term mesocyclone refer to in reference to a tornado? A) the rotation of the updraft in the parent thunderstorm B) a high-altitude tornado C) a false-alarm tornado warning D) a very large tornado Page Ref: 276

6 26) are relatively narrow, elongated bands of thunderstorms that develop in the warm sector of a middle-latitude cyclone, usually in advance of a cold front. A) Roll clouds B) Mesocyclones C) Squall lines D) Supercells Page Ref: ) Which type of lightning is least likely? A) within the same cloud B) cloud-to-earth C) cloud-to-cloud Page Ref: ) Which of the following demonstrates the correct order of the phases involved in a lightning stroke? A) Step leaders, return stroke, separation of charges, flow of negative charge into ground, dart leader B) Charge separation, step leaders, return stroke, flow of negative charge into ground, dart leader C) Dart leader, charge separation, flow of negative charge into ground, step leaders, return stroke D) Charge separation, dart leader, step leaders, flow of negative charge into ground, return stroke Page Ref: ) If you see lightning and then hear the associated thunder 10 seconds later, the lightning flash was about mile(s) away. A) three B) four C) one D) five E) two Page Ref: ) Tornadoes are most frequent during the: A) month of September. B) January-March period. C) April-June period. D) October-December period. E) July-August period. Page Ref: 287

7 31) Of the following states, which is struck by the largest number of tornadoes? A) North Carolina B) Ohio C) Oklahoma D) New Mexico E) North Dakota Page Ref: ) The diameter of a typical tornado funnel cloud would be: A) meters. B) meters. C) meters. D) 3000 meters Page Ref: ) Tornadoes most often move toward what direction? A) southeast B) west C) northeast D) southwest E) northwest Page Ref: ) Why do most tornadoes tend to travel in the same general direction? A) Because of their clockwise rotation. B) They generally occur in a zone of southwest winds. C) They have an intense pressure gradient force. D) Tornadoes often occur to the east of the center of a midlatitude cyclone. Page Ref: ) Doppler radars: A) detect lightning strokes. B) have much greater range than conventional radars. C) detect condensation nuclei. D) show the motion of air in clear areas. E) show the motion of precipitation particles. Page Ref: ) Which association is incorrect? A) tornado watch a tornado has been sighted on the ground B) downdraft precipitation C) anvil - front of the thunderstorm D) mesocyclone region of tornado formation Page Ref: 294