Weather Products

• Tower controlled airports

• Updated hourly

• Weather and airport information

AIM 7-1-10

• Operated by the NWS

• 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

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 for wind gusts ≥ 50kn, hail > 3/4in diameter, tornados

• ForeFlight/NOAA convective outlook

• GFA Symbols Legend

• Ceiling & Visibility

• Clouds

• Precipitation

• Thunderstorms

• Temperature

• Winds Aloft

• Turbulence

• Icing