Download meteo 1 mid term III

Meteo 1 Mid Term III Fall 2012 CH 10 1) (1 pt) The initial stage of an ordinary cell thunderstorm is the a. mature stage. b. dissipating stage. c. cumulus stage. d. multicell stage. 2) (2 pt) Ordinary cell thunderstorms only last about one hour and begin to dissipate when a. lightning neutralizes all the electrical charge in the cloud. b. when all the precipitation particles in the cloud turn to ice. c. when the downdraft spreads throughout the cloud and cuts off the updraft. d. when solar heating at the ground begins to decrease. 3) (1 pt) A group of thunderstorms which develop in a line one next to the other, each in a different stage of development, are called a. ordinary thunderstorms. b. a thunderstorm cluster. c. a multicell thunderstorm. d. mature thunderstorms. 4) (2 pt) The downdraft in an ordinary cell thunderstorm is created mainly by a. the melting of snow in the anvil. b. electrical attraction between the cloud and ground. c. the release of latent heat as water in the cloud freezes. d. evaporating raindrops that make the air cold and heavy. e. upper level wind motions. 5) (1 pt) The leading edge of a thunderstorm's cold downdraft is known as a a. downburst. b. squall line. c. gust front. d. dry line. e. microburst. 6) (1 pt) A line of thunderstorms that forms ahead of an advancing cold front is called a a. roll cloud. b. squall line. c. wall cloud. d. gust front. e. dry line. 7) (10 pt) Discuss the development and evolution of a single cell thunderstorm using the three stage model in this figure. Use your knowledge of the physical processes that cause this development with which to base your discussion. (e.g. what is causing the 0 deg C contour to elevate in stage A, and depress in stage B and C; why does the storm end in stage c?) 8) (1 pt) Electrons a. are negatively charged. b. are positively charged. c. carry no charge. d. can carry either positive or negative charge. 9) (2 pt) The top of a thunderstorm is normally ________ charged, and the middle and lower parts are _______ charged. a. negatively, negatively b. negatively, positively c. positively, positively d. positively, negatively 10) (2 pt) An anvil cloud forms near the TOP BOTTOM of a thunderstorm where the thunderstorm cloud reaches a STABLE UNSTABLE region of the atmosphere. (choose one word from each pair) 11) (1 pt) The greatest potential for flooding is with thunderstorms that are FAST SLOW moving. (circle one answer) 12) (10 pt) Discuss the development of multi‐cell thunderstorms using the above figure to help you. (try to answer these questions: why is the convection not vertical like in single cell thunderstorms? Why do multi‐cell t‐storms last longer than single cell t‐storms? (use the next page if you need the space) CH 11 13) (2 pt) Hurricane energy comes from the latent heat of a. evaporation b. condensation c. fusion d. melt 14) (1 pt) The skies in the center (eye) of a hurricane are often cloud free. This is because the air in the eye a. is sinking. b. is very cold. c. is dry. d. is expanding. 15) (2 pt) Pressure at the center of a hurricane is ______ than the surroundings at the surface and _______ than the surroundings aloft. a. higher, lower b. lower, higher c. lower, lower d. higher, higher 16) (2 pt) The vertical structure of the hurricane shows an upper‐level of air, and a surface of air. a. outflow, inflow b. outflow, outflow c. inflow, outflow d. inflow, inflow 17) (1 pt) Hurricane winds rotate in a clockwise direction a. in the Northern Hemisphere only. b. in the Southern Hemisphere only. c. in both the Northern and Southern Hemispheres. d. in neither hemisphere. 18) (2 pt) The main source of energy for a hurricane is the a. upper‐level jet stream. b. rising of warm air and sinking of cold air in the vicinity of weather fronts. c. warm ocean water and release of latent heat energy by condensation. d. ocean currents and tides. 19) (1 pt) The strongest winds in a hurricane heading westward toward Florida would most likely be found on the ___________ side. a. northern b. southern c. eastern d. western 20) (2 pt) Hurricanes can’t form along the equator because a. there isn’t much water along the equator, it’s mostly land b. the Coriolis force is too small along the equator c. there are no feedback mechanisms along the equator d. it’s too humid for the ocean water to evaporate 21) (2 pt) Hurricanes derive their energy from transfer of sensible heat and __________heat from warm tropical oceans into the atmosphere. (fill in the blank) 22) (10 pt) Label the regions where tropical storms form. Place circles where they form, label the names of the storms for those regions, and place some arrows showing the typical paths these storms take.
23) (1 pt) A hurricane's intensity will INCREASE or DECREASE when the storm moves from the ocean onto land. (circle one answer) 24) (2 pt) Tropical cyclone development is most likely in a region where surface winds CONVERGE or DIVERGE. (circle one answer) intensifying tropical cyclone
25) (10 pt) Discuss the development of a hurricane and use the above figure to help you. Begin with the conditions that exist before the hurricane begins and then discuss the reasons why the heat, moisture, and air parcels move around this hurricane system. Consider these questions: What are some of the beginning conditions that lead to a hurricane? What are the conditions that are positive feedbacks to this hurricane? Continue on the next page if you need the room (and you might). CH 9 26) (2 pt) Which of the following is presently a problem with modern‐day weather predictions? a. computer forecast models make assumptions about the atmosphere that are not always correct b. there are regions of the world where only sparse observations are available c. computer models do not always adequately interpret the surface's influence on the weather d. the distance between grid points on some models is too large to pick up smaller‐scale weather features such as thunderstorms e. all of these 27) (2 pt) Which of the following explain why it is possible to see clouds on satellite photographs taken at night? a. the clouds reflect visible light from the sun b. the clouds reflect light coming from the moon c. the clouds emit visible light d. the clouds emit infrared light 28) (1 pt) The forecasting technique that produces several versions of a forecast model, each beginning with slightly different weather information to reflect errors in the measurements, is called a. climatology forecasting. b. redundancy analysis. c. persistence forecasting. d. ensemble forecasting. Questions 29‐33 refer to this illustration (to the right>>>) of a middle latitude cyclone (the dashed lines show the positions of the fronts 6 hours ago) 29) (1 pt) The storm system will apparently move toward the a. northeast. b. east. c. southeast. d. northwest. 30) (1 pt) At which of the 4 positions would you expect to hear the following 12‐hour forecast: "Cloudy and cold this morning with snow this afternoon and tonight?" a. 1 b. 2 c. 3 d. 4 31) (1 pt) At which of the 4 positions would you expect to hear the following 12‐hour forecast: "Cloudy with possible showers today, turning colder by tonight?" a. 1 b. 2 c. 3 d. 4 32) (1 pt) At which of the 4 positions would you expect to hear the following 12‐hour forecast: "Clearing and colder today with continued rising pressures?" a. 1 b. 2 c. 3 d. 4 33) (2 pt) At which of the 4 positions would you expect to hear the following 12‐hour forecast: "Partly cloudy and continued warm through this afternoon and evening?" a. 1 b. 2 c. 3 d. 4 34) (1 pt) By examining a surface map, the movement of a surface low pressure area can be predicted based upon the a. orientation of the isobars in the warm sector. b. region of greatest pressure decrease. c. movement during the previous 6 hours. d. all of these. 35) (1 pt) If a mid‐latitude cyclonic storm has moved from the southwest toward the northeast during the past six hours, during the next six hours the storm is likely to move toward the a. northwest b. southwest c. southeast d. northeast 36) (1 pt) Low pressure systems tend to move toward the region of greatest a. barometric pressure b. surface pressure rise c. surface pressure drop d. visibility 37) (1 pt) High pressure systems tend to move toward the region of greatest a. barometric pressure b. surface pressure rise c. surface pressure drop d. visibility 38) (2 pt) Surface pressure systems tend to move __________ the wind at the 500‐mb level. a. at the same speed b. much faster than c. in the same direction as d. in the opposite direction as 39) (1 pt) A model is run several times with slight changes in the starting data to generate a(n) ____________ forecast. (fill in the blank) 40) (10 pt) On this map, draw the locations of the cold and warm fronts where you forecast them to be positioned at 6 and 12 hours. Also, place an “L” where you thing the low pressure center will be in 6 and 12 hours. Describe your weather forecast for Chicago over the next 24 hours. Surface weather map for 6:00 a.m. Tuesday. Dashed lines indicate positions of
weather features six hours ago. Areas shaded green are receiving rain, while
areas shaded white are receiving snow, and those shaded pink, freezing rain or
sleet.