Weather Flashcards
1
Q
What is an AIRMET?
A
- Advisories of significant weather phenomena
- Describes conditions of intensities lower than those that require the issuance of a SIGMET
- Issued for 6 hours periods (Amended as necessary due to changing weather conditions)
- Typically weather that is hazardous to general aviation
2
Q
Types of AIRMETS?
A
- SIERRA
- TANGO
- ZULU
3
Q
SIERRA
A
- IFR Conditions and mountain obscuration
4
Q
TANGO
A
- Moderate turbulence
- Sustained surface winds 30kts or greater
- Low-Level Wind Shear
5
Q
ZULU
A
- Moderate icing
- Freezing level heights
6
Q
What is a SIGMET?
A
- Advises of non-convective weather that is potentially hazardous to ALL aircraft
- Issued every 4 hours
- Severe or extreme weather not associated with thunderstorms
- Conditions including (Icing, turbulence, dust/sandstorms, and volcanic ash)
- Visibility is less than 3 SM
7
Q
What is a Convective SIGMET?
A
- Advises of convective weather that is potentially hazardous to ALL aircraft
- Severe or extreme weather associated with thunderstorms or convective activity
- Surface winds greater than or equal to 50kts
- Hail, at the surface greater than or equal to 3⁄4” in diameter
- Severe icing, turbulence, or wind shear due to thunderstorms
- Embedded thunderstorms
- line of thunderstorms covering 40% or more of an area at least 60 miles
- Issued every 2 hours
8
Q
What is a TAF? When is it issued?
A
- Terminal Aerodrome Forecast
- Issued every 6 hours (4 times daily and valid for 24 hours)
9
Q
What is a METAR? When is it issued?
A
- Meteorological Termination Aviation Routine Weather Report
- Issued every hour
