Aviation Weather Services Flashcards

A METAR observation includes the remark 'TS ALQDS.' What does this indicate?

Answer: Thunderstorms in all quadrants around the station

'TS ALQDS' in a METAR remark means thunderstorms are reported in all quadrants surrounding the reporting station.

Which aviation weather product provides forecasts for specific airport terminal areas and is valid for 24 to 30 hours?

Answer: TAF

A Terminal Aerodrome Forecast (TAF) provides weather forecasts for a 5 statute mile radius around an airport and is valid for 24 to 30 hours.

When decoding a winds aloft forecast, the entry '9900' for wind direction and speed means:

Answer: Winds are calm or less than 5 knots

'9900' in a winds aloft forecast is a special code indicating light and variable winds (calm or less than 5 knots).

A SIGMET (WS) is issued for which of the following conditions?

Answer: Severe or extreme turbulence at any altitude

SIGMETs are issued for hazardous meteorological conditions significant to all aircraft, including severe or extreme turbulence, regardless of altitude.

On a surface analysis chart, isobars spaced closely together indicate:

Answer: Strong pressure gradient and stronger winds

Closely spaced isobars represent a steep pressure gradient, which produces stronger winds between the high and low pressure areas.

What does the 'SM' unit represent in a METAR visibility report?

Answer: Statute miles

In a METAR, 'SM' denotes statute miles, the standard unit used for reporting visibility in U.S. aviation weather reports.

A remote pilot notices the surface temperature is 85°F and the dewpoint is 83°F. This small temperature-dewpoint spread suggests:

Answer: High relative humidity and increased likelihood of fog or low clouds

A small temperature-dewpoint spread indicates the air is near saturation, increasing the likelihood of fog, mist, or low cloud formation.