CFI Instrument Practical Test Standards, FAA-S-8081-9B, June 2001

III. Preflight Preparation

A. Weather Information

e. Winds and temperatures aloft charts

1) Forecast winds and temperatures aloft chart
a) Graphic presentation of the tabulated winds and temperatures aloft forecast (FD)
b) Prepared as 8 separate panels for 8 altitudes
i) 6000, 9000 and 12000 feet MSL true altitude, and
ii) 18000, 24000, 30000, 34000, and 39000 feet MSL pressure altitude
c) Issued daily as 12-hour forecasts valid at 1200 and 0000Z
d) Temperature in °C
e) Winds TRUE
f) AWC - Winds and temperatures aloft type charts online
2) Observed winds aloft
a) Prepared in 4 separate panels for 4 levels (second standard level, 14000, 24000 and 34000 feet MSL)
b) Issued and valid twice daily at 1200 and 0000Z
c) Observed winds are 5 to 8 hours old when received
3) Use to help choose best altitude(s)

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