Weather Sources, Reports & Effects

Correct

The answer is A: They are 5 to 10 SM from the station

VC (vicinity) means the phenomenon is between 5 and 10 statute miles from the point of observation. Weather at the station is coded without VC, and weather beyond 10 SM is left out of the body and may appear in the remarks, for example as distant (DSNT).

Source: FAA-H-8083-28B p. 24-13 · ACS UA.III.A.K2

Correct

The answer is A: Fully automated, with no human oversight

AUTO identifies a fully automated report with no human intervention or oversight. Augmented reports, where an observer adds input, don't carry AUTO, and a corrected report uses COR instead.

Source: FAA-H-8083-28B p. 24-9 · ACS UA.III.A.K5

Correct

The answer is A: 200 feet AGL

TAF cloud heights, like METAR heights, are in hundreds of feet AGL, so BKN007 is a ceiling at 700 feet AGL, not 7,000. Staying 500 feet below it gives 700 − 500 = 200 feet AGL, lower than the 400-foot limit; flying to the base ignores the 500-foot rule.

Source: FAA-H-8083-28B p. 27-14 · 14 CFR 107.51(d) · ACS UA.III.A.K3

Correct

The answer is B: In hundreds of feet MSL

The Aviation Clouds Forecast gives cloud coverage and heights in hundreds of feet MSL, so 040 is 4,000 feet above sea level, which may be much closer to the ground at a high site. METAR and TAF cloud heights, by contrast, are AGL.

Source: FAA-H-8083-28B p. 27-22 · FAA-H-8083-28B p. 24-15 · ACS UA.III.A.K4

Correct

The answer is B: 5,100 feet

Pressure altitude = 2,000 + (29.92 − 29.72) × 1,000 = 2,200 feet. Standard temperature is 15 − 2 × 2.2 = 10.6 °C, so density altitude ≈ 2,200 + 120 × (35 − 10.6) ≈ 5,100 feet. Stopping at pressure altitude ignores the heat, and reversing the pressure correction gives 4,600 feet.

Source: FAA-H-8083-28B p. 8-14 · ACS UA.III.B.K1a

Correct

The answer is C: From the sea toward the land

Land heats faster than water during the day, so lower pressure forms over the warm land and a sea breeze blows from the sea to the land, usually on calm, sunny summer days. A land breeze, from land to sea, is the nighttime and early-morning pattern.

Source: FAA-H-8083-28B p. 10-9 · FAA-H-8083-28B p. 10-11 · ACS UA.III.B.K1b

Correct

The answer is A: Hail may exist aloft and melt as it falls

Hailstones begin to melt once they fall into air warmer than 0 °C, so a storm may deliver only rain at the surface while hail exists higher up. Rain at the surface does not mean there is no hail aloft.

Source: FAA-H-8083-28B p. 14-6 · ACS UA.III.B.K1h