Weather Products

• Tower controlled airports
• Updated hourly
• Weather and airport information

AIM 7-1-10

• Operated by the NWS National Weater Service
• Updated every minute
• More comprehensive than AWOS

AIM 7-1-10

• Operated by the FAA
• Updated every minute
• 4 levels, 11 types

AWC Weather Depiction - Satellite Radar

• Visibility
• Precipitation
• Clouds
• Ceiling

GFA Symbols Legend

• Ceiling & Visibility
• Clouds
• Precipitation
• Thunderstorms
• Temperature
• Winds Aloft
• Turbulence
• Icing

AIM 7-1-6  PHAK 13-11

• Conditions hazardous to light aircraft
• Vaild for 6 hours, issued as needed, updated as necessary
• Abbreviated – (WA) weather advisory

Sierra

• Mountain obscuration
• IFR – ceilings < 1000’ and/or visibility < 3sm over 50% of area

Tango

• Light to moderate turbulence
• Sustained surface winds > 30kn
• Low-level wind shear

Zulu

• Conditions favorable for light to moderate icing

AIM 7-1-6  PHAK 13-12

SIGMET

• Non-convective weather hazardous to all aircraft
• Issued as needed, updated as necessary
• Vaild 4 hours, 6 hours for hurricanes
  • Volcanic ash (VA / WV)
  • Tropical cyclone (TC)
  • Weather phenomenon (WS)
    • Severe icing
    • Severe or extreme turbulence
    • Widespread dust storms with visibility < 3sm

Convective SIGMET (WST)

• Hazardous convective weather affecting flight safety
• Valid for 2 hours, issued as needed, updated as necessary
  • Line Thunderstorm – 60+ miles long with TS affecting 40% of length
  • Area Thunderstorm – 40% of 3000sq mi area with strong radar or satellite reflectivity
  • Embedded Thunderstorm – more than 30 minutes
    • Special Issuance – wind gusts ≥ 50kn, hail > 3/4in diameter, tornados
    • ForeFlight/NOAA convective outlook