CFI Instrument Practical Test Standards,
FAA-S-8081-9B, June 2001
III. Preflight Preparation
A. Weather Information
1. Sources of weather-
c. Transcribed weather broadcast (TWEB)
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1) Weather and other aeronautical data recorded on tape and broadcast continuously over selected low-frequency NAVAIDs and/or VORs
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a) Generally route-oriented
b) NWS forecasts
c) Inflight advisories
d) Winds aloft
e) METAR/SPECI reports
f) NOTAMs
g) Special notices
3) Use to aid preflight and inflight planning