WX 201 Final Exam with correct Answers

WX 201 Final Exam with correct Answers Which of the following air masses is not typically seen in the U.S. in winter? Maritime polar Continental tropical Maritime tropical Continental polar Continental tropical The continental arctic (cA) air mass is usually produced at high latitudes by persistent: Radiational cooling It's January and you're in Portland, Oregon. The wind is blowing from the west at 10 knots and it's drizzling. What type of air mass are you likely experiencing? Maritime polar A front is technically defined as: A transition zone between air masses of different densities You're in class on campus on some December day in some year. When you entered class, the temperature was 65 F with partly cloudy skies and winds out of the south at 15 knots. When you leave class, you find that the temperature is 52 F with light rain and winds out of the NW at 20 knots. What type of front likely passed through Daytona while you were in class? Cold front (T/F) A dryline is defined as an air temperature boundary. False A cold occluded front features _____ air just behind the front than just ahead of it Colder The passage of a warm occluded front in the winter would most likely occur in which of the following locations? Seattle, Washington Portland, Maine Kansas City Raleigh, NC Seattle, Washington An occluded front is typically marked using a ______ Purple line A _______ front features warm air advancing into a region of cooler air. Warm Does cA (continental arctic) exist in the Summer? No Does cP (continental polar) exist in Summer? Yes mP most common places Pacific NW, Northern California New England/Mid-Atlantic coasts Characteristics of mT air mass in North America high dewpoints, heavy precipitation In summer mT east of the Rockies, west side of Bermuda high very unstable When are tornadoes most likely to occur in FL? January How does meridional flow assist in occluded fronts? Allow the air to go up and down allowing them to mix What is the biggest collision point? Midwest: Texas, Oklahoma, Kansas, Nebraska maybe North Dakota Does cold air move faster on the surface or aloft? Surface Why shouldn't pilots go through stationary fronts? icing concern Where is it colder in a cold front? ahead or behind the line? behind Where is the lowest pressure in a front? Right at the front maritime A humid air mass that forms over oceans continental A dry air mass that forms over land What does a cold front do to air that was warm before it? Digs under the warm, making the warm air rise.