BMA 11 Flashcards
A ________ is a weather report that expresses what the weather is expected to be at some future time.
Forecast
A ________is a standard international format for hourly surface weather observations.
METAR
The _______ is a forecast of surface weather expressed at an airport that is issued 4 times daily.
TAF
The lowest sky condition to constitute a ceiling is_____.
BKN
A weather advisory of hazardous weather conditions of concern to all is called a ________.
SIGMET
A weather __________ is an observed weather phenomenon that requires immediate action by the receiver.
warning
A high pressure system has a counterclockwise air circulation and is normally associated with favorable weather.
False
A low pressure system is usually associated with unstable weather.
True
The ______ _______is a narrow meandering band of intense westerly winds that can affect the weather and contain CAT.
Jet Stream
A front that wedges cold air under warm air causing instability and sometimes severe weather is a_____ front.
Cold
_________ turbulence is caused by surface heating and the resultant rising of warm air.
Thermal
This type of turbulence occurs when wind blows greater than 25 knots perpendicular across the top of a mountain range.
Mountain wave turbulence
Arguably, the single greatest weather threat to aircraft operations is a _____________.
Thunderstorm
The _________ stage represents the beginning life cycle for all thunderstorms.
Cumulus
Turbulence, lightning, hail, tornadoes and icing are all typical thunderstorm hazards.
True
