Training Guide in Surface Weather Observations - Multiple Choices

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INSTRUCTIONS: Select the best answer. REVIEW QUESTIONS 1. In a METAR report, the temperature/dew point group follows the __________ group. a. wind b. temperature c. sky condition d. pressure 2. Which character is used to separate the temperature and dew point? a. one space b. / c. \ d. & 3. If the temperature is missing, the group is _______________ . a. omitted b. replaced with “M” c. replaced with “MISSING” d. replaced with “?” 4. Temperature is determined to the nearest _____________________________ . a. whole degree Fahrenheit b. whole degree Celsius c. tenth of a degree Celsius d. tenth of a degree Fahrenheit 5. If required, dew point is determined to the nearest _________________________ . a. whole degree Fahrenheit b. whole degree Celsius c. tenth of a degree Celsius d. tenth of a degree Fahrenheit 6. Temperature and dew point are reported in the body of the METAR/SPECI report in ______ . a. whole degrees Fahrenheit b. whole degrees Celsius c. tenths of a degree Celsius d. whole degrees Kelvin 6-17
7. If using Fahrenheit thermometers to obtain temperatures, you must read the thermometers to the nearest ____________. a. tenth of a degree Fahrenheit b. whole degree Fahrenheit c. whole degree Celsius d. tenth of a degree Celsius INSTRUCTIONS: Use your station’s psychrometric calculator to compute the dew point temperature, then use the temperature conversion chart located on the next page to convert the dry bulb and dew point temperatures to their Celsius equivalent; finally, code the temperature and dew point as they would be transmitted in a METAR/SPECI report. (The answers were computed using a calculator with a pressure base of 30 inches of mercury. If you use a calculator with a different pressure base, your answers will differ slightly.) 8. Dry Bulb 43.5°F Wet Bulb 38.6°F Depression Dew Point °F Converstion: TEMP °C DEW POINT °C Coded report: 9. Unfrozen Wick: Dry Bulb 32.1°F Wet Bulb 31.4°F Depression Dew Point °F Converstion: TEMP °C DEW POINT °C Coded report: 10. Frozen Wick: Dry Bulb 30.2°F Wet Bulb 24.9°F Depression Dew Point °F Converstion: TEMP °C DEW POINT °C Coded report: INSTRUCTIONS: Use the Dew Point Table provided in Appendix B to compute the dew point temperature, then use the temperature conversion chart located at the end of the chapter to convert the dry bulb and dew point temperatures to their Celsius equivalent; finally, code the temperature and dew point as they would be transmitted in a METAR/SPECI report. 11. Dry Bulb 94.3°F Wet Bulb 71.7°F Dew Point °F Conversion: TEMP °C DEW POINT °C Coded report: 12. Dry Bulb 43.8°F Wet Bulb Missing Dew Point °F Converstion: TEMP °C DEW POINT °C Coded report: 13. Dry Bulb 31.9°F Wet Bulb 30.7°F Dew Point °F Converstion TEMP °C DEW POINT °C Coded report: 14. Dry Bulb and Wet Bulb temperatures are missing. ____________________ 15. When ventilating a psychrometer, when is the dry-bulb thermometer read? Are there any exceptions to this rule? 6-18
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Training Guide in Surface Weather O
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PREFACE METAR/SPECI is the internat
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CHAPTER 7 - PRESSURE ..............
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1.2 Content and Format of the Manua
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1.6 Report Modifier - COR An observ
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1-6
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12. A METAR observation contains se
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25. At no time shall an observation
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2.1.4 Estimated Winds Though winds
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2-4
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Code the following wind situations
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19. Which of the following wind par
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3.1 Visibility 1 CHAPTER 3 VISIBILI
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3.2.3 Surface and Tower Visibility
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SUR- FACE VISIBILITY PRESENT WEATHE
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3.3 Visibility Chart As an aid for
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OUTLINE DETERMINING VISIBILITY From
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REVIEW QUESTIONS Select the best an
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11. 12. At the time of observation,
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23. Weather conditions being equal,
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38. Visibility of 2 3/8 miles is re
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When more than one type of present
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4.1.2 Descriptors Descriptors are q
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Obscurations that stand alone, i.e.
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Question: What does an observer do
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Footnotes for Weather Phenomena Mat
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9. +FZRA a. Severe freezing rain b.
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23. Volcanic ash is reported: a. wh
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37. Match the following present wea
Page 60 and 61: 46. Which of the following precipit
Page 62 and 63: 59. Steady rain is observed 4 miles
Page 64 and 65: 72. Rain showers of an unknown inte
Page 66 and 67: 5.2 Sky Cover Figure 5-2. Weather O
Page 68 and 69: Example 5-2. One Layer with Single
Page 70 and 71: Figure 5-4. Advancing Layer (sky co
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Page 74 and 75: Figure 5-10. Surface-base Layer Sur
Page 76 and 77: Example 5-5. Four Layers. The follo
Page 78 and 79: Example 5-8. One Layer. Example 5-9
Page 80 and 81: 1 CU - Cumulus 1 Example 5-12. Mult
Page 82 and 83: layer aloft will be considered as m
Page 84 and 85: 5. When a balloon is used for deter
Page 86 and 87: OUTLINE DETERMINING SKY COVER AMOUN
Page 88 and 89: Select the correct answer. REVIEW Q
Page 90 and 91: 20. If a layer aloft has less than
Page 92 and 93: 40. Match the following reportable
Page 94 and 95: 6.1 Temperature and Dew Point - T
Page 96 and 97: 6. Obtain the difference between th
Page 98 and 99: Other examples of determining wet-b
Page 100 and 101: The conversion from ice to water ca
Page 102 and 103: a. Read right end of index in minim
Page 104 and 105: Figure 6-8. Reading a Thermometer t
Page 106 and 107: TIME G LST G UTC (2) TEMP. (°C) DE
Page 108 and 109: Method II: Centrifugal Force A shor
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Page 114 and 115: 6-21 +130 129 128 127 126 +125 124
Page 116 and 117: 6-23
Page 118 and 119: The altimeter setting shall be repo
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Page 122 and 123: 7. Sea-level pressure is an adjustm
Page 124 and 125: 2. Additive Data [NA SAWRS] 3- and
Page 126 and 127: 8.2.2.2 24-Hour Precipitation Amoun
Page 128 and 129: When finished, put the emptied meas
Page 130 and 131: 8.3.3.1 Depth of New Snow (Snowfall
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Page 134 and 135: 10. A thunderstorm is overhead, mov
Page 136 and 137: 26. A 6-hourly maximum temperature
Page 138 and 139: CHAPTER 9 REVIEW EXERCISES OBSERVIN
Page 140 and 141: Exercise #3 Lower layer has ____/8t
Page 142 and 143: Exercise #5 Surface based layer has
Page 144 and 145: Exercise #7 Total sky coverage is _
Page 146 and 147: Exercise #9 Lower layer has ____/8t
Page 148 and 149: Exercise #11 Total sky coverage is
Page 150 and 151: QUALITY CONTROL EXERCISE Each of th
Page 152 and 153: 21. METAR KKKK 282045Z E29006KT 7SM
Page 154 and 155: 42. METAR KFFF 302250Z 03008KT 40SM
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...unfocused lights of moderate int
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22. b precipitation occurring not a
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52. b. decreasing dominance. 53. b.
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24. 8 VV 25. 8 OVC 26. 7 BKN 27. as
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A-14
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A-16
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A-18
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18. 1200 UTC or other time modified
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9. Lower layer has 1 /8ths coverage
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16. METAR KFFF 312148Z 36005KT 1 1/
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43. METAR KGGG 052145Z 05009KT 4SM
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WET BULB TEMPERATURES 31 32 33 34 3
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WS Form B-11 (12-96) Pres. by WSOH
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C-3
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. If an altimeter setting indicator
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