Statistics for FAA Weather Reports

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Hint	Answer	% Correct
Towered field reports 55 minutes past the hour	ATIS (Automated Terminal Information Service)	75%
	surface hail ≥ 3/4" diameter	50%
Reports by the hour	ASOS (Automated Surface Observing System)	25%
Reports by the minute	AWOS (Automated Weather Observing System)	25%
	extensive mountain obscuration	25%
Airmet Tango	moderate turbulence	25%
	nonconvective low-level wind shear	25%
	Dust or sand storm lowering surface visibility ≤ 3 SM	0%
	freezing level heights	0%
Airmet Sierra	IFR conditions	0%
Airmet Zulu	moderate icing	0%
the only source of directly observed weather information	Pilot Weather Report (PIREP)	0%
	severe, extreme, or clear air turbulence	0%
Sigmet (WS) Weather not produced by thunderstorms	severe icing	0%
Convective Sigment (WST) reports:	Severe thunderstorms	0%
with these characteristics	surface winds ≥ 50 kts	0%
	sustained surface winds ≥ 30 kts	0%
	tornadoes	0%
	volcanic ash	0%