Training Guide in Surface Weather Observations - Multiple Choices

20. If a layer aloft has less than 1/8 of sky cover, the reportable contraction is:
a. SKC
b. FEW
c. SCT
d. VV
21. An obscuration is the portion of sky that is by weather phenomena either surface-based
or aloft.
22. If all the sky is visible through a surfaced-based phenomenon covering 8/8 of the sky, the sky cover
contraction used if no other layers are present is .
23. If the sky is visible everywhere through a layer of smoke aloft that covers 8/8 of the sky, the sky
cover of the layer is eighths and the sky cover contraction is .
24. If the sky cannot be seen because of a layer of smoke at the surface that hides 8/8 of the sky, the sky
cover of the layer is eighths and the sky cover contraction used is .
25. If 8/8 of the sky is covered by a layer aloft that hides 6/8 of the sky, the sky cover layer is
and the sky contraction used is .
26. If 7/8 of the sky is covered by a layer aloft that hides 2/8 of the sky, the sky cover of the layer is
and the sky cover contraction used is .
27. Sky cover contractions are entered in column 10 of MF1M-10C in (ascending, descending) order
of the height of the layers. (Circle one)
28. A ceiling is defined as
29. How should each of the following observed heights be recorded in column 10 of MF1M-10C?
a. 175 feet
b. 11,250 feet
c. 7,750 feet
d. 50 feet
e. 725 feet
f. 2,650 feet
30. The height of all layers, including the ceiling layer, will be recorded in column 10 of MF1M-10C
in terms of feet above .
31. An overcast layer of clouds is present over the field. A balloon is released and the observer notes
that the balloon begins to fade at 1,800 feet and completely fades from view at 2,000 feet. This sky
condition would be entered in column 10 of MF1M-10C as: .
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