Training Guide in Surface Weather Observations - Multiple Choices

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CHAPTER 9 REVIEW EXERCISES OBSERVING and CODING EXERCISES Complete each practice observation. First, fill in the blanks for each layer of sky cover, and visibility when required. Use the dew point table provided in Appendix B to compute the dew point temperature; also use the temperature conversion charts provided in Chapter 6. The dew point table is required for these exercises even though many stations use the psychrometric calculator (see Chapter 6). Then code the report as it would be transmitted in a METAR/SPECI on the line below. Not all stations are required to report each element; for example, a SAWRS will generally not report the dew point temperature in the body, or the sea-level pressure and hourly temperatures in remarks. All observations are taken on the 21st of March 1997 at Alexandria, LA. The first exercise has been completed. Exercise #1 - Example: Lower layer has 3 /8ths coverage. Prevailing visibility is 4 statute miles. Upper layer has 4 /8ths coverage. Sector visibility and direction (if any). Total sky coverage is 7 /8ths. Given: Altimeter: 29.933 inches Sea-level pressure: 999.7 hPa Wind indicator has direction of 230°, speed is 10 knots. Dry bulb temperature is 68.6°F; wet bulb temperature is 58.1°F Computed dew point is 50°F Haze is obstructing the visibility. The last element was observed at 1055 UTC. METAR KAEX 211055Z 23010KT 4SM HZ SCT070 BKN120 20/10 A2993 RMK SLP997 T02030100 9-1
Exercise #2 Lower layer has ____ /8ths coverage. Prevailing visibility is statue miles. Upper layer has_____/8ths coverage. Sector visibility and direction is (if any). Total sky coverage is ____/8ths. Given: Altimeter: 29.925 inches Sea-level pressure: 997.5 hPa Wind indicator has direction of 50°, speed is 3 knots. Dry bulb temperature is 74.2°F; wet bulb temperature is 65.3°F Computed dew point is °F. The layer at 2,500 feet is composed of smoke. The last element was observed at 1155 UTC. 9-2
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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
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46. Which of the following precipit
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59. Steady rain is observed 4 miles
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72. Rain showers of an unknown inte
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5.2 Sky Cover Figure 5-2. Weather O
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Example 5-2. One Layer with Single
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Figure 5-4. Advancing Layer (sky co
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5-8
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Figure 5-10. Surface-base Layer Sur
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Example 5-5. Four Layers. The follo
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Example 5-8. One Layer. Example 5-9
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1 CU - Cumulus 1 Example 5-12. Mult
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layer aloft will be considered as m
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5. When a balloon is used for deter
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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
Page 110 and 111: INSTRUCTIONS: Select the best answe
Page 112 and 113: 16. Under what conditions is the de
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
Page 120 and 121: 7-4
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
Page 132 and 133: 8-10
Page 134 and 135: 10. A thunderstorm is overhead, mov
Page 136 and 137: 26. A 6-hourly maximum temperature
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
Page 156 and 157: 16. a. METAR 17. b. second 18. d. f
Page 158 and 159: 11. - a change in wind direction of
Page 160 and 161: ...unfocused lights of moderate int
Page 162 and 163: 22. b precipitation occurring not a
Page 164 and 165: 52. b. decreasing dominance. 53. b.
Page 166 and 167: 24. 8 VV 25. 8 OVC 26. 7 BKN 27. as
Page 168 and 169: A-14
Page 170 and 171: A-16
Page 172 and 173: A-18
Page 174 and 175: 18. 1200 UTC or other time modified
Page 176 and 177: 9. Lower layer has 1 /8ths coverage
Page 178 and 179: 16. METAR KFFF 312148Z 36005KT 1 1/
Page 180 and 181: 43. METAR KGGG 052145Z 05009KT 4SM
Page 182 and 183: WET BULB TEMPERATURES 31 32 33 34 3
Page 184 and 185: WS Form B-11 (12-96) Pres. by WSOH
Page 186 and 187: 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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