Chapter #9 Solutions - Essentials of Meteorology - C Donald Ahrens - 6th Edition

1qr. What is the function of the National Center for Environmental Prediction? Get solution

1qt. What types of watches and warnings are most commonly issued for your area? Get solution

2qr. How does a weather watch differ from a weather warning? Get solution

2qt. Since computer models have difficulty in adequately considering the effects of small-scale geographic features on a weather map, why don’t numerical weather forecasters simply reduce the grid spacing to, say, 1 kilometer on all models? Get solution

3qr. How does a prog differ from an analysis? Get solution

3qt. Suppose it’s warm and raining outside. A cold front will pass your area in 3 hours. Behind the front, it is cold and snowing. Make a persistence forecast for your area 6 hours from now. Would you expect this forecast to be correct? Explain. Now, make a forecast for your area using the steady-state or trend forecasting method. Get solution

4qr. In what ways have high-speed computers assisted the meteorologist in making weather forecasts? Get solution

4qt. Why isn’t the steady-state method very accurate when forecasting the weather more than a few hours into the future? What considerations can be taken into account to improve a steady-state forecast? Get solution

5qr. How are computer-generated weather forecasts prepared? Get solution

5qt. Go outside and observe the weather. Make a weather forecast using the weather signs you observe. Explain the rationale for your forecast. Get solution

6qr. What are some of the problems associated with computer-model forecasts? Get solution

6qt. Explain how the phrase “sensitive dependence on initial conditions” relates to the final outcome of a computer-based weather forecast. Get solution

7qr. List at least four tools a weather forecaster might use when making a short-range forecast. Get solution

7qt. Suppose the chance for a “White Christmas” at your home is 10 percent. Last Christmas was a white one. If for next year you forecast a “nonwhite” Christmas, will you have shown any skill if your forecast turns out to be correct? Explain. Get solution

8qr. Get solution

8qt. Get solution

9qr. Get solution

10qr. Describe four methods of forecasting the weather and give an example for each one. Get solution

11qr. How does pattern recognition aid a forecaster in making a prediction? Get solution

12qr. Suppose that where you live, the middle of January is typically several degrees warmer than the rest of the month if u forecast this “January thaw” for the month middle of next January what type of weather forecast will you have made? Get solution

13qr. (a) look out the window and make a persistence forecast for tomorrow at this time. (b) Did you use any skill in making this prediction? Get solution

14qr. How can ensemble forecasts improve medium range forecasts? Get solution

15qr. Explain how teleconnections are used in making a long-range seasonal outlook. Get solution

16qr. If today’s weather forecast calls for a “chance of snow,” what is the percentage probability that it will snow today? (Hint: See Table 9.1, p. 263). Reference: Table 9.1: ... Get solution

17qr. Do all accurate forecasts show skill on the part of the forecaster? Explain. Get solution

18qr. List three methods that you would use to predict the movement of a surface mid-latitude cyclonic storm. Get solution

19qr. Do monthly and seasonal forecasts make specific predictions of rain or snow? Explain. Get solution