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What is an AIRMET (Airmen's Meteorological Information)?
describe moderate icing, moderate turbulence, sustained surface winds \ge 30 knots, or Instrument Flight Rules (IFR) conditions
What hazardous weather does an AIRMET 'Sierra' (AIRMET S) describe?
(IFR) conditions and/or extensive mountain obscuration.
What hazardous weather does an AIRMET 'Tango' (AIRMET T) describe?
Issued for moderate turbulence, sustained surface winds of \ge 30 knots, and/or non-convective low-level wind shear.
What hazardous weather does an AIRMET 'Zulu' (AIRMET Z) describe?
Issued for moderate icing and/or freezing levels.
What is a SIGMET (Significant Meteorological Information)?
A weather advisory for severe weather phenomena that are potentially hazardous to all aircraft.
Tpye of Convective SIGMET
Sandstorm/Dust storm/Volcanic Ash
Tpye of Convective SIGMET
TS covering 40% or greater of 3K mi² area
Type of Convective SIGMET
Embedded TS
Type of Convective SIGMET
Winds >50kts
Tpye of Convective SIGMET
Hail at surface ¾ in or greater