The atmosphere is a continuous fluid that envelops the globe, so weather observation, analysis, and forecasting ______ require international...
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1. The atmosphere is a continuous fluid that envelops the globe, so weather observation, analysis, and

forecasting ______ require international cooperation.

a. do

b. do not

2. A World Meteorological Center is located at or near ______.

a. Washington, DC

b. Moscow, Russia

c. Melbourne, Australia

d. All of the above are correct

3. In the U.S., the National Centers for Environmental Prediction (NCEP) includes ______.

a. the Ocean Prediction Center

b. the Climate Prediction Center

c. the Hail Prediction Center

d. both a and b are correct

e. all of the above are correct

4. Weather forecasting requires ______.

a. acquisition of weather data representing the present state of the atmosphere

b. depiction of observational data on weather maps and charts

c. analysis of weather data and application of numerical prediction models

d. dissemination of weather information and forecasts to users

e. all of the above are correct

5. Weather stations gather data for ______.

a. preparation of maps and forecasts and international exchange of weather information

b. use by aviation

c. climatic purposes

d. both a and c are correct

e. all of the above are correct

6. At 1000 UTC, it is ______ Eastern Standard Time (EST) in New York City, NY.

a. midnight

b. 2 a.m.

c. 5 a.m.

d. 7 a.m.

7. At 1400 UTC, it is ______ Central Standard Time (CST) in Houston, TX.

a. 2 a.m.

b. 8 a.m.

c. 2 p.m.

d. 8 p.m.

8. The National Data Buoy Center ______.

a. maintains a network of automated weather stations in coastal and offshore locations

b. plays an important role in the analysis and forecasting of tropical cyclones

c. operates weather stations attached to moored buoys in the Great Lakes

d. both a and b are correct

e. all of the above are correct

9. Universal Coordinated Time (UTC) is the world standard time for weather observations. It is the local

standard time at Longitude ______.

a. 0°

b. 45°W

c. 90°W

d. 180°

10. The modern system of weather observations at National Weather Service Forecast Offices is called





d. NMC

11. The U.S. Historical Climatology Network is a select, subnetwork of ______.





12. The principal function of the NWS Cooperative Observer Program is to record daily precipitation and

temperatures for ______ purposes.

a. hydrologic

b. agricultural

c. climatic

d. both b and c are correct

e. all of the above are correct

13. The Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) is an example of a network

operated by ______.

a. National Weather Service personnel

b. the Federal Aviation Administration

c. private citizens or businesses in cooperation with the National Weather Service

14. A radio-equipped instrument package used to monitor conditions in the troposphere and lower

stratosphere that is carried aloft by a balloon is ______.

a. a radiosonde

b. a dropsonde


15. Radiosondes provide vertical profiles (soundings) of ______.

a. temperature

b. dewpoint

c. air pressure

d. all of the above are correct

16. By international agreement, radiosonde balloons are launched everywhere at the same time at

______ intervals.

a. 1-hr

b. 6-hr

c. 12-hr

d. 24-hr

17. Adjustment of air pressure observations to sea level is intended to remove the influence of ______

on barometer readings.

a. temperature

b. wind speed and direction

c. humidity

d. station elevation variations due to topography

18. The station model format and symbols plotted on weather maps ______.

a. are the same throughout the world

b. vary by location worldwide

c. must be written in English

19. An isobar is a line plotted on a weather map joining locations reporting the same ______.

a. dewpoint

b. temperature

c. elevation

d. air pressure

e. all of the above are correct

20. Lines of equal temperature plotted on a weather map are called ______.

a. isotherms

b. isobars

c. contours of elevation

d. isohyets

21. Isobars ______.

a. often cross one another

b. by convention are drawn at 4-mb intervals on U.S. surface weather maps

c. join locations reporting the same pressure value

d. both b and c are correct

e. all of the above are correct

22. On a surface weather map, where isobars are closely spaced winds are likely to be relatively ______.

a. weak or calm

b. strong

23. The percentage of the atmosphere's mass located above the 300-mb level is ______.

a. 30%

b. 50%

c. 70%

d. 100%

24. The percentage of the atmosphere's mass located below the 500-mb level is ______.

a. 30%

b. 50%

c. 70%

d. 100%

25. About ______ of the atmosphere's mass is located below the 300-mb level.

a. 30%

b. 50%

c. 70%

d. 100%

26. Horizontal winds generally blow______ to the height contours at the 500-mb level.

a. parallel

b. perpendicular

27. In winter, a cold 500-mb trough tends to develop over ______.

a. the ocean

b. the continents

28. An anticyclone that appears on a 500-mb map occupies a column of relatively ______.

a. cold air

b. warm air

29. Air pressure falls ______ with altitude in a column of warm air than a column of cold air.

a. faster

b. slower

30. Simultaneous advection of warm air into upper-air ridges and advection of cold air into upper-air

troughs favors ______.

a. zonal air flow

b. fair weather

c. improving weather

d. meridional air flow

31. Differences in altitude of the 500-mb surface from one place to another can be explained primarily

by differences in mean ______ of the air below the 500-mb surface.

a. humidity

b. temperature

c. wind speed

d. wind direction

32. The geostrophic or gradient wind is observed at the ______-mb level.

a. 1000

b. 950

c. 500

d. 300

33. At the 500-mb level, the air column under a ______ is colder than the air column under a ______.

a. trough ... ridge

b. ridge ... trough

34. An upper-air trough may be linked to a surface ______.

a. warm-core cyclone

b. cold-core cyclone

c. warm-core anticyclone

d. cold-core anticyclone

35. The scale of atmospheric circulation most important in forecasting tomorrow's weather is ______.

a. mesoscale

b. microscale

c. planetary-scale

d. synoptic-scale

36. Numerical models have been used to successfully predict ______.

a. the weather of the next 24 hrs

b. the coastal region to be affected by a hurricane storm surge

c. the onset of El Niño

d. all of the above are correct

37. Meteorologists have been using computer models to help forecast the weather since the ______.

a. 1920s

b. 1930s

c. 1940s

d. 1950s

38. The decline in weather forecast skill with lengthening forecast period is due to ______.

a. input of inaccurate observational data into numerical models

b. missing observational data, especially over the ocean

c. imprecise numerical models of the Earth-atmosphere system

d. both a and b contribute

e. all of the above contribute

39. An example of an NCEP numerical weather model is (are) ______.

a. High Resolution Rapid Refresh (HRRR)

b. North American Mesoscale (NAM)

c. Global Forecast System (GFS)

d. Both a and b are correct

e. All of the above are correct

40. Special NWS forecast centers are responsible for ______.

a. predicting the track of tropical cyclones and issuing hurricane watches and warnings

b. issuing tornado and severe thunderstorm watches

c. issuing river, reservoir, and flood forecasts

d. all of the above are correct

41. The track and intensity forecast period for tropical cyclones covers periods up to ______.

a. 12 hrs

b. 48 hrs

c. 72 hrs

d. 120 hrs

42. Applied to tropical cyclones (tropical storms and hurricanes), the SLOSH model can be used to

accurately predict ______.

a. the amount of rainfall.

b. the maximum wind speed at landfall

c. the height of the storm surge in specific coastal areas

d. the likely location of associated tornadoes

43. Forecasting the track of a hurricane is based on ______.

a. records of tracks of similar hurricanes of the past

b. numerical models of the atmosphere

c. the experience of the forecaster

d. some combination of the above

44. The Storm Prediction Center would typically issue a tornado warning for ______.

a. a full state

b. a full county

c. a designated polygonal region expected to be most directly affected

d. a single town

45. The National Water Model is the foundation for the ______.

a. National Centers for Environmental Prediction

b. National Data Buoy Center

c. National Hurricane Center

d. National Water Center

46. Scientists at the Space Weather Prediction Center monitor the ______.

a. aurora

b. solar wind

c. progression of the solar cycle

d. all of the above are correct

47. The first communications system that made possible weather analysis and forecasting was ______.

a. the telegraph

b. the telephone

c. radio

d. satellites

48. Over the course of a year, daily weather generally exhibits a ______ weather bias (condition).

a. fair

b. stormy

49. A weather ______ is issued when hazardous weather is taking place or is imminent.

a. advisory

b. watch

c. warning

50. NOAA's Weather Ready Nation has led to ______.

a. improved forecasts and communication of risk to local authorities

b. development of mobile-ready emergency response teams

c. partnerships to enhance community preparedness

d. both a and b are correct

e. all of the above are correct

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