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CHAPTER 13 1 A weather warning indicates that Hazardous weather is either 2 A weather watch would probably be issued for which of the following imminent or occurring within the forecast area conditions There is a chance for tornadoes tomorrow 3 An analysis is A surface or upper level chart that 4 A forecast of an extended period of dry weather would be made for a region interprets the present weather patterns beneath An upper level ridge 5 Suppose it is warm and raining and a cold front is moving toward your location Directly behind the cold front it is cold and snowing Still further behind the front the weather is cold and clearing If the front is scheduled to pass your area in 6 hours a persistence forecast for your area for 2 hours from now would be Warm and raining 6 The least accurate forecast method of predicting the weather two days into 7 Weather forecast that predicts that the future weather will be the same as the future during changeable weather conditions is usually the Persistence forecast the present weather is called Persistence forecasting 8 Which forecasting method assumes that weather systems will move in the same direction and at the same speed as they have been moving Steady state trend forecast 9 A persistence forecast could be quite accurate when You are positioned in the middle of a large stationary air mass is called Nowcasting 10 A weather forecast for the immediate future that employs the trend method 11 By examining a surface map the movement of a surface low pressure area can be predicted based upon the All of the above 12 Predicting the weather by weather types employs which forecasting method Analogue 13 A forecast method that compares past weather maps and weather patterns to those of the present is The Analogue method 14 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 Ensemble forecasting 15 Suppose that where you live the middle of January is typically several degrees warmer than the rest of the month If you forecast this January thaw for the middle of next January you would have made a Climatological forecast 16 A probability forecast that calls for a 40 percent chance of rain means that There is a 40 chance of rain that any random place in forecasted area can receive measurable rain 17 Which of the following is presently a problem with modern day weather predictions All of the above 18 An accurate forecast May or may not show skil 19 For a forecast to show skill it must Be better than a persistence forecast or a climatological forecast 20 A prog is The final forecast chart representing the atmosphere at a specified future time called a prognostic chart prog 21 The forecasting of weather by a computer is known as Numerical weather prediction 22 The greatest improvement in forecasting skill during the past 30 years has been made in forecasting Severe storm warnings for hurricanes and tornadoes 23 Automated Surface Observing Systems ASOS measure Wind temperature pressure cloud base height and runway visibility at various airports 24 A wind that changes direction in a counterclockwise sense with increasing height is called a n Backing wind 25 Warm advection is most likely to occur From the surface up to the 500mb level ahead of an advancing warm front 26 The National Weather Service system of watches warnings and advisories generally don t address weather conditions which limit visibility False 27 Suppose there are two cloud layers above you The lower cloud layer is moving from a westerly direction while the higher cloud layer is moving from a northwesterly direction From this observation you conclude that the wind is with height and advection is occurring between the cloud layers Back cold 28 When making a forecast a meteorologist typically examines all of the above 29 Modern computer forecasting models have increasingly smaller grid spacing This presents which of the following problems Much more computations are needed 30 Very short range forecasts often utilize which of the following forecast methods Subjective interpretations of surface observations satellite imagery and Doppler radar information 31 Lines connecting points of equal pressure change are called Isallobars 32 Which below is NOT a condition associated with an omega high 33 A comma cloud is A band of organized cumuliform clouds that look like a comma on a satellite photograph 34 If you wanted to make a persistence forecast of minimum and maximum temperatures for a particular city which type of chart would be most helpful A surface weather map CHAPTER 14 1 All thunderstorms require Rising air 2 The initial stage of an ordinary thunderstorm is the Cumulus stage 3 Ordinary thunderstorms only last about one hour and begin to dissipate when The downdraft spreads throughout the cloud and cuts off the updraft 4 An ordinary thunderstorm is a Scattered or isolated storm that is not 5 Downdrafts spread throughout a thunderstorm during the stage severe Dissipating 6 An ordinary thunderstorm is most intense during the stage Mature 7 The most likely time for an ordinary thunderstorm to form is Afternoon 8 Severe thunderstorms are different from ordinary thunderstorms in that severe thunderstorms Have a tilted updraft in the mature stage 9 A supercell storm is An enormous thunderstorm that last for several 10 Severe thunderstorms are capable of producing all of the above 11 In a severe thunderstorm hail may all of the above 12 A Mesoscale Convective Complex is actually Individual thunderstorms that grow into a large long lasting weather system 13 Thunderstorms which produce tornadoes Have rotating updrafts 14 The downdraft in an ordinary thunderstorm is created mainly by Evaporating raindrops that make he air cold and heavy 15 The cloud that forms along the leading edge of a gust front is called A roll 16 The leading edge of a thunderstorm s cold downdraft is known as a Gust hours cloud front 17 The small area of high pressure created by the cold heavy air of a thunderstorm downdraft is called Mesohigh 18 Which of the following would you NOT expect to observe during the passage of a gust front Increase air temperature 19 A small thunderstorm cloud with virga falling out of its base and blowing dust at the ground could warn of a severe hazard to an airplane because This could indicate an intense downdraft or microburst 20 The main difference between a downburst


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FSU MET 1010 - CHAPTER 13

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