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The weather forecast is compiled by a qualified meteorologist  (perhaps with an element of automation/guidance from NWP) of the designated aerodrome meteorological office (AMO). It will include, as a minimum, the following parameters:

1. a) Surface Wind direction and speed;

2. b) Visibility;

3. c) Weather;

4. d) Cloud type (if CB or TCU), cloud amount and height of cloud base; and

5. e) Expected significant changes to one or more of these elements during the period of validity.

The period of validity of an aerodrome forecast shall be either 9 or 24 or 30 hours (determined by the competent authority based upon local requirements) and shall be published not earlier than 1 hour before the commencement of their period of validity.

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The architecture typically involves the following components:

• Meteorological Data Collection

• Meteorological Analysis and Forecast Models

• Aerodrome-Specific Data

• Continuous Monitoring and Updates

Service Consumption

Service Consumer Organization

An Aerodrome Meteorological Observation Information Service can be discovered via the SWIM Registry and will be used primarily by:

• Aerodrome Air Traffic Service Providers

• Airspace Users operating in/out of the aerodrome or as a planned diversion.

• Airports

• Aerodrome Meteorological Office(s)

Consumer Usage

An Aerodrome Meteorological Forecast Information Service will be used primarily by:

• Aerodrome Air Traffic Service Providers

  • Capacity and demand scenario planning (i.e. LVP clearance timing)

  • Anticipating runway changes

  • Planning for Switching between time-based separation for landing and distance based

• Network Manager:

  • Significant weather disruptions occurring at major airport, particularly simultaneously, can have impacts on network predictability. Planning for such events is preferable.

• Airspace Users operating in/out of that aerodrome or as planned diversion.

  • Operators, pilots, flight dispatchers, flight crew members and flight operations centres

Both in the pre flight planning phases and also updates en-route for anticipating landing conditions/configuration in advance of arrival, and planning diversions when necessary.

• Airports

  • Local operating decisions for safety and efficiency i.e. snow clearance, de-icing, grass-cutting, re-fueling etc.

• Aerodrome meteorological office(s)

  • Consistent issuing of airfield warnings and alerts as necessary.