CHAPTER 13A weather warning indicates that: Hazardous weather is either imminent or occurring within the forecast areaA weather watch would probably be issued for which of the following conditions? There is a chance for tornadoes tomorrowAn analysis is: A surface or upper-level chart that interprets the present weather patternsA forecast of an extended period of dry weather would be made for a region beneath: An upper level ridgeSuppose 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 rainingThe least accurate forecast method of predicting the weather two days into the future during changeable weather conditions is usually the: Persistence forecastWeather forecast that predicts that the future weather will be the same as the present weather is called: Persistence forecastingWhich forecasting method assumes that weather systems will move in the same direction and at the same speed as they have been moving? Steady-state or trend forcastingA persistence forecast could be quite accurate when: You are positioned in the middle of a large stationary air massA weather forecast for the immediate future that employs the trend method is called: NowcastingBy examining a surface map, the movement of a surface low pressure area can be predicted based upon the: All of the abovePredicting the weather by weather types employs which forecasting method? Analogue methodA forecast method that compares past weather maps and weather patterns to those of the present is: Analogue methodThe 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 forecastingSuppose 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 forecastA 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 a forecasted area can receive measurable rainWhich of the following is presently a problem with modern-day weather predictions? All of the aboveAn accurate forecast: May or may not show skillFor a forecast to show skill it must: Be better than a persistence forecast or a climatological forecastA prog is: The final forecast chart representing the atmosphere at a specified future time called a prognostic chart (prog)The forecasting of weather by a computer is known as: Numerical weather predictionThe greatest improvement in forecasting skill during the past 30 years has been made in forecasting: Severe storm warnings for hurricanes and tornadoesAutomated Surface Observing Systems (ASOS) measure: Wind, temperature, pressure, cloud-base height and runway visibility at various airportsA wind that changes direction in a counterclockwise sense with increasing height is called a(n): Backing windWarm advection is most likely to occur: From the surface up to the 500mb level ahead of an advancing warm frontThe National Weather Service system of watches, warnings, and advisories generally don't address weather conditions which limit visibility. False 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, coldWhen making a forecast, a meteorologist typically examines: Surface charts, upper air charts, radar display, satellite imagery (all of the above)Modern computer forecasting models have increasingly smaller grid spacing. This presents which of the following problems? Much more computations are neededVery short-range forecasts often utilize which of the following forecast methods?Subjective interpretations of surface observations, satellite imagery and Doppler radar informationLines connecting points of equal pressure change are called: IsallobarsWhich below is NOT a condition associated with an omega high? It IS a blocking high, one that tends to persist in the same geographic location for many days. I don’t know what it is NOTA comma cloud is: A band of organized cumuliform clouds that look like a comma on a satellite photographIf 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 mapCHAPTER 14All thunderstorms require: Rising airThe initial stage of an ordinary thunderstorm is the: Cumulus stageOrdinary thunderstorms only last about one hour and begin to dissipate when: The downdraft spreads throughout the cloud and cuts off the updraftAn ordinary thunderstorm is a: Scattered or isolated storm that is not severeDowndrafts spread throughout a thunderstorm during the ____ stage. DissipatingAn ordinary thunderstorm is most intense during the ____ stage. Mature The most likely time for an ordinary thunderstorm to form is: Afternoon Severe thunderstorms are different from ordinary thunderstorms in that severe thunderstorms: Have a tilted updraft in the mature stageA supercell storm is: An enormous thunderstorm that lasts for several hoursSevere thunderstorms are capable of producing: Large hail, tornadoes, flash floods (all of the above)In a severe thunderstorm, hail may: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)A Mesoscale Convective Complex is actually: Individual thunderstorms that grow into a large, long-lasting weather systemThunderstorms which produce tornadoes: Have rotating updraftsThe downdraft in an ordinary thunderstorm is created mainly by: Evaporating raindrops that make the air cold and heavyThe cloud that forms along the leading edge of a gust front is called: A roll cloudThe leading edge of a thunderstorm's cold downdraft is known as a: Gust frontThe small area of high pressure created by the cold, heavy air of a thunderstorm downdraft is called: Mesohigh Which of the following would you NOT expect to observe during the passage of a gust front?
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