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VFR/IFR-SIERRA
 TURBULENCE-TANGO
 ICING-ZULU
 Convective SIGMETs
  • Instrument Flight Rules (IFR) or Mountain Obscuration - AIRMET SIERRA (6-hour period)
    • Ceilings less than 1000 feet and/or visibility less than 3 miles affecting over 50% of the area at one time.
    • Extensive mountain obscuration
current image- AIRMET SIERRA - from AWC