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Weather Reports, Forecasts and Charts

Remote pilots can access weather reports, forecasts and charts by visiting
www.aviationweather.gov or www.1800wxbrief.com.
The Automated Surface Observing System (ASOS) is the primary surface weather observing
system of the U.S. Automated weather reporting systems are increasingly being installed at
airports. These systems consist of various sensors, a processor, a computer-generated voice
subsystem and a transmitter to broadcast local, minute-by-minute weather data directly to the
pilot. The Automated Weather Observing System (AWOS) observations will include the prefix
“AUTO” to indicate that the data is derived from an automated system.

An international weather reporting code is used for weather reports (METAR) and forecasts
(TAFs) worldwide. The reports follow the format shown in Figure 3-4. For aviation purposes,
the ceiling is the lowest broken or overcast layer, or vertical visibility into an obscuration.

Figure 3-4 TAF/METAR weather card

DRONE PART 107 CERTICIFACTION PREPARATION COURSE 19