Training Guide in Surface Weather Observations - Multiple Choices

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23. Volcanic ash is reported: a. when visibility is less than 7 miles b. only during daylight hours c. whenever it occurs d. only if accompanied by fog or mist 24. Match the following code figures to the qualifier or phenomenon they represent: _____ MI a. ice pellets _____ BC b. sandstorm _____ SH c. shallow _____ PE d. showers _____ GR e. smoke _____ BR f. mist _____ FU g. spray _____ PY h. patches _____ SS i. hail Decode the following present weather groups: 25. RASN BR = ____________________________________________________________________ 26. TS SHRA SQ = ________________________________________________________________ 27. TS VCSH FG = ________________________________________________________________ 28. TS FZRA = ___________________________________________________________________ 29. +FC TSRA BR = ______________________________________________________________ 30. FZFG = ______________________________________________________________________ 31. Which present weather group(s) cannot be reported: _____ FZBR _____ 2SM FG _____ VCTS SHRA BR _____ +TSRA _____ FZDZ _____ FZSA _____ BLRA _____ SHPE 32. What are the differences between blowing and low drifting snow? 33. Before the obscuration mist, smoke, widespread dust, sand, haze, or spray is entered in column 9 of MF1M-10C, it must be occurring both at the and at the and must reduce the prevailing visibility to less than miles. 4-14
34. Precipitation is: a. any particle falling from the sky b. any form of water particles that fall from the atmosphere and reache the ground c. any form of water found at the earth’s surface d. water in any state (liquid, solid, vapor) moving through the atmosphere 35. Match the following precipitation types with their definitions: drizzle a. a fall of unbranched ice crystals in the form of needles, columns, or plates rain b. small balls or other pieces of ice snow c. mostly branched ice crystals in the form of six-pointed stars snow grains d. transparent or translucent pellets of ice with diameters less than 5 mm ice crystals e. fine drops of liquid precipitation with diameters less than 0.5 mm ice pellets f. very small, white, and opaque grains of ice hail g. liquid precipitation drops with diameters greater than 0.5 mm snow pellets h. white, opaque grains of ice with diameters from 2 to 5 mm 36. Match the following obscurations with their definition: mist volcanic ash haze fog widespread dust spray smoke sand a. visible aggregate of minute water particles based at the earth’s surface that reduce horizontal visibility to less than 5/8 statute miles b. fine particles of earth or other material raised or suspended in the air by the wind c. a suspension in the air of small particles produced by combustion d. an ensemble of water droplets torn by the wind from the surface of an extensive body of water e. visible aggregate of minute water particles based at the earth’s surface that reduces horizontal visibility to less than 7 statute miles but not less than 5/8 statute miles f. sand particles raised by the wind g. fine particles of rock power that originate from a volcano h. a suspension in the air of extremely small, dry particles that give the air an opalescent appearance 4-15
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Training Guide in Surface Weather O
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PREFACE METAR/SPECI is the internat
Page 6 and 7: CHAPTER 7 - PRESSURE ..............
Page 8 and 9: 1.2 Content and Format of the Manua
Page 10 and 11: 1.6 Report Modifier - COR An observ
Page 12 and 13: 1-6
Page 14 and 15: 12. A METAR observation contains se
Page 16 and 17: 25. At no time shall an observation
Page 18 and 19: 2.1.4 Estimated Winds Though winds
Page 20 and 21: 2-4
Page 22 and 23: Code the following wind situations
Page 24 and 25: 19. Which of the following wind par
Page 26 and 27: 3.1 Visibility 1 CHAPTER 3 VISIBILI
Page 28 and 29: 3.2.3 Surface and Tower Visibility
Page 30 and 31: SUR- FACE VISIBILITY PRESENT WEATHE
Page 32 and 33: 3.3 Visibility Chart As an aid for
Page 34 and 35: OUTLINE DETERMINING VISIBILITY From
Page 36 and 37: REVIEW QUESTIONS Select the best an
Page 38 and 39: 11. 12. At the time of observation,
Page 40 and 41: 23. Weather conditions being equal,
Page 42 and 43: 38. Visibility of 2 3/8 miles is re
Page 44 and 45: When more than one type of present
Page 46 and 47: 4.1.2 Descriptors Descriptors are q
Page 48 and 49: Obscurations that stand alone, i.e.
Page 50 and 51: Question: What does an observer do
Page 52 and 53: Footnotes for Weather Phenomena Mat
Page 54 and 55: 9. +FZRA a. Severe freezing rain b.
Page 58 and 59: 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
Page 72 and 73: 5-8
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
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TIME G LST G UTC (2) TEMP. (°C) DE
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Method II: Centrifugal Force A shor
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INSTRUCTIONS: Select the best answe
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16. Under what conditions is the de
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6-21 +130 129 128 127 126 +125 124
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6-23
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The altimeter setting shall be repo
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7-4
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7. Sea-level pressure is an adjustm
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2. Additive Data [NA SAWRS] 3- and
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8.2.2.2 24-Hour Precipitation Amoun
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When finished, put the emptied meas
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8.3.3.1 Depth of New Snow (Snowfall
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8-10
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10. A thunderstorm is overhead, mov
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26. A 6-hourly maximum temperature
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CHAPTER 9 REVIEW EXERCISES OBSERVIN
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Exercise #3 Lower layer has ____/8t
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Exercise #5 Surface based layer has
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Exercise #7 Total sky coverage is _
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Exercise #9 Lower layer has ____/8t
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Exercise #11 Total sky coverage is
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QUALITY CONTROL EXERCISE Each of th
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21. METAR KKKK 282045Z E29006KT 7SM
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42. METAR KFFF 302250Z 03008KT 40SM
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16. a. METAR 17. b. second 18. d. f
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11. - a change in wind direction of
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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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Training Guide in Surface Weather Observations - Multiple Choices

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