...

Common Service Definition

Significant Metrological The service definition for the En-route Significant Weather information service is currently under development by the MET3SG Task Team on Service Architecture. See IWXXM SIGMET Subscription and Request Service.

Significant Meteorological Information or SIGMET is issued by meteorological authorities to provide information about significant meteorological phenomena that may pose a hazard to all aircraft.

...

The following are examples of weather phenomena that may be described in a SIGMET:

• Thunderstorms

• Cyclones (Tropical Revolving Storms)

• Severe turbulence

• Severe icing

• Severe Mountain Waves

• Dust or Sand Storms

• Volcanic Ash

Service Provision

Service Provider Organization

...