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 FORECAST MODELS QUIZ

METEOROLOGIST JEFF HABY

The following 20 question quiz asks multiple choice questions based on the information covered at the links of the following webpage: http://theweatherprediction.com/models/

An answer key is provided at the bottom of this webpage.

1. The best prog to analysis pure thermal advection for locations near sea level is:
a. Surface
b. 850 mb
c. 500 mb
d. 300 mb

2. The prog that upward vertical velocity is usually displayed upon is:
a. Surface
b. 700 mb
c. 500 mb
d. 300 mb

3. The jet stream, jet streaks, longwave pattern, and amplification pattern of troughs and ridges is analyzed at:
a. 300 mb
b. 700 mb
c. 850 mb
d. Surface

4. All these models are primarily used for short term forecasts (0 to 48 hours) except:
a. ETA
b. NGM
c. AVN
d. GFS

5. For vertical motion to occur from 500 mb vorticity which of the following needs to occur:
a. The value of the vort max to be increasing over time
b. The value of the vort max to be decreasing over time
c. A wind flow through the vorticity gradient
d. A wind flow parallel to the vorticity gradient

6. High values of relative humidity always mean there is a large quantity of water vapor in the air.
a. True
b. False

7. Instability on the models is assessed through both the:
a. CAPE and LI
b. Vertical velocity and Helicity
c. Dewpoint and relative humidity
d. Thermal advection and vorticity advection

8. This is a numerical form of model data for a specific location:
a. FWC
b. PVA
c. MPL
d. MOS

9. The tendency for a forecast model to make the same mistake each time similar weather conditions set-up for a particular region is termed a model:
a. Deviation
b. Error
c. Bias
d. Mistake

10. Dynamic upward vertical motion on the forecast models assess the strength of a thunderstorm's convective updraft if they develop.
a. True
b. False

11. A 1000 to 500 mb thickness of 6,000 meters would indicate:
a. A column of very warm air
b. A column of very cold air

12. Air will __________________ along frontal boundaries.
a. Diverge
b. Converge

13. 850 temperatures tend to warm in which situation:
a. Strong dynamic lifting
b. Cold air advection pattern
c. Evaporation into the air
d. Downsloping wind

14. Rain can not occur if instability is not present.
a. True
b. False

15. A ridge is a region of ____________ and _____________.
a. Higher heights and warmer temperatures
b. Higher heights and colder temperatures
c. Lower heights and warmer temperatures
d. Lower heights and colder temperatures

16. Which of the following is displayed on the 1000-mb model ETA prog?
a. The upper level trough-ridge pattern
b. Convergence
c. Surface temperature
d. Predicted precipitation

17. Which of the following is shown on all the 850, 700, 500 and 300 mb ETA prog panels?
a. Temperature and dewpoint
b. Height contours and horizontal wind vectors
c. Wind direction and temperature
d. Vertical velocity and relative humidity

18. A decreasing thickness over time due to temperature advection indicates:
a. Cold air advection
b. Warm air advection

19. The ___________ pressure systems tend to cover a larger spatial area.
a. High
b. Low

20. This prog is used to pick out both short waves and vorticity centers.
a. 850 mb
b. 700 mb
c. 500 mb
d. 300 mb

KEY

1. B
2. B
3. A
4. D
5. C
6. B
7. A
8. D
9. C
10. B
11. A
12. B
13. D
14. B
15. A
16. B
17. B
18. A
19. A
20. C