MET1010 FINAL Study Guide CHAPTER 13 1 A weather warning indicates that 2 A weather watch would probably be issued for which of the following conditions 3 An analysis is 4 A forecast of an extended period of dry weather would be made for a region beneath 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 6 The least accurate forecast method of predicting the weather two days into the future during changeable weather conditions is usually the 7 Weather forecast that predicts that the future weather will be the same as the present weather is called 8 Which forecasting method assumes that weather systems will move in the same direction and at the same speed as they have been moving 9 A persistence forecast could be quite accurate when Hazardous weather is either imminent or occurring within the forecast area There is a chance for tornadoes tomorrow A surface or upper level chart that interprets the present weather patterns An upper level ridge Warm and raining Persistence forecast Persistence forecasting Steady state trend forecast You are positioned in the middle of a large stationary air mass Nowcasting 10 A weather forecast for the immediate future that employs the trend method is called 11 By examining a surface map the movement of a surface low pressure area can be predicted based upon the 12 Predicting the weather by weather types employs which All of the above Analogue forecasting method 13 A forecast method that compares past weather maps and weather patterns to those of the present is 14 The forecasting technique that produces several versions of a forecast model each beginning with slightly different The analogue method Ensemble forecasting weather information to reflect errors in the measurements is called 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 16 A probability forecast that calls for a 40 percent chance of rain means that Climatological forecast There is a 40 chance of rain that any random place in a forecasted area can receive measurable rain All of the above 17 Which of the following is presently a problem with modern day weather predictions 20 A prog is 18 An accurate forecast 19 For a forecast to show skill it must May or may not show skill Be better than a persistence forecast or a climatological forecast The final forecast chart representing the atmosphere at a specified future time called a prognostic chart prog Numerical weather prediction Sever 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 Backing wind 22 The greatest improvement in forecasting skill during the 21 The forecasting of weather by a computer is known as past 30 years has been made in forecasting 24 A wind that changes direction in a counterclockwise sense with increasing height is called a n 25 Warm advection is most likely to occur From the surface up to the 500mb level ahead of an advancing warm front False Back cold 26 The National Weather Service system of watches warnings and advisories generally don t address weather conditions which limit visibility 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 28 When making a forecast a meteorologist typically examines 29 Modern computer forecasting models have increasingly smaller grid spacing This presents which of the following problems 30 Very short range forecasts often utilize which of the following forecast methods 31 Lines connecting points of equal pressure change are called 32 A comma cloud is 33 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 Surface charts upper air charts radar display satellite imagery all of the above Much more computations are needed Subjective interpretations of surface observations satellite imagery and Doppler radar information Isallobars A band of organized cumuliform clouds that look like a comma on a satellite photograph A surface weather map CHAPTER 14 1 All thunderstorms require 2 The initial stage of an ordinary thunderstorm Rising air Cumulus stage is the 3 Ordinary thunderstorms only last about one hour and begin to dissipate when 4 An ordinary thunderstorm is a 5 Downdrafts spread throughout a thunderstorm during the stage 6 An ordinary thunderstorm is most intense during the stage 7 The most likely time for an ordinary thunderstorm to form is 8 Severe thunderstorms are different from ordinary thunderstorms in that severe thunderstorms 9 A supercell storm is 10 Severe thunderstorms are capable of producing 11 In a severe thunderstorm hail may 12 A Mesoscale Convective Complex is actually 13 Thunderstorms which produce tornadoes 14 The downdraft in an ordinary thunderstorm is created mainly by 15 The cloud that forms along the leading edge of a gust front is called 16 The leading edge of a thunderstorm s cold downdraft is known as a 17 The small area of high pressure created by the cold heavy air of a thunderstorm downdraft is called 18 Which of the following would you NOT expect to observe during the passage of a gust front 19 A small thunderstorm cloud with virga falling out of its base and blowing dust at the ground The downdraft spreads throughout the cloud and cuts off the updraft Scattered or isolated storm that is not severe Dissipating Mature Afternoon Have a tilted updraft in the mature stage An enormous thunderstorm that last for several hours Large hail tornadoes flash floods all of the above Fall from the base of the anvil fall from the bottom of the cloud be tossed out the side of cloud all of the above Individual thunderstorms that grow into a large long lasting weather system Have rotating updrafts Evaporating raindrops that make the air cold and heavy A roll cloud Gust front Mesohigh Increase air
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