Practice Quiz – Chapter 13

1. The least accurate forecast method of predicting the weather two days into the future during changeable weather conditions is usually the:

a. trend method

b. persistence forecast

c. analogue method

d. prediction by weather types

e. numerical weather prediction

2. A persistence forecast could be quite accurate when:

a. a frontal system approaches your location at constant speed

b. you are positioned in the middle of a large, stationary air mass

c. the weather has been unusually cold for several days

d. upper level winds blow straight from west to east

3. 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:

a. climatology forecasting

b. redundancy analysis

c. peristence forecasting

d. ensemble forecasting

e. probability forecasting

4. An accurate forecast:

a. always shows skill

b. may or may not show skill

c. never shows skill

d. requires complex computer equipment

5. For a forecast to show skill it must:

a. be better than one based on persistence or climatology

b. be accurate to within 2°C of the predicted temperature

c. be accurate for over more than 90% of the forecast area

d. use the analogue method of forecasting

e. use a probability

6. A wind that changes direction in a clockwise sense with increasing height is called a(an):

a. backing wind

b. Ekman spiral

c. meridional wind

d. veering wind

7. Lines connecting points of equal pressure change are called:

a. isobars

b. isograds

c. contours

d. isotherms

e. isallobars

8. A forecast method that compares past weather maps and weather patterns to those of the present is:

a. persistence forecasting

b. the analogue method

c. the trend method

d. nowcasting

9. Warm advection is most likely to occur:

a. in the center of a cut-off low

b. from the surface up to the 500 mb level ahead of an advancing warm front

c. behind a cold front

d. where the winds back with height

e. on the western side of a shortwave trough at the 500 mb level

10. For a forecast to show skill it must:

a. be better than one based on persistence or climatology

b. be accurate to within 2°C of the predicted temperature

c. be accurate for over more than 90% of the forecast area

d. use the analogue method of forecasting

e. use a probability