world area forecast system

world area forecast system (WAFS)

A world-wide system by which world and regional area forecast centers provide aeronautical meteorological enroute forecasts in uniform standardized formats (ICAO). The objective of the world forecast system is to:
i. Supply meteorological offices with forecasts of en route meteorological conditions concerning upper winds; upper-air temperatures; the direction, speed, and height of maximum winds; the tropopause height; and significant weather in pictorial and/or alphanumeric form suitable, as far as practicable, for direct use by operators, flight crewmembers, air traffic services units, and other aeronautical users.
ii. Supply meteorological authorities and other users with upper winds; upper-air temperatures; the direction, speed, and height for maximum winds; and tropopause height forecasts; and forecasts of significant weather phenomena for grid points in digital form.
These objectives must be achieved through a comprehensive, integrated, worldwide, and, as far as practicable, uniform system and in a cost-effective manner.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
For the next generation of the World Area Forecast System (WAFS), the global Graphical Turbulence Guidance (G-GTG) has been developed using global numerical weather prediction (NWP) model outputs as an input to compute a set of turbulence diagnostics, identifying strong spatial gradients of meteorological variables associated with clear-air turbulence (CAT) and mountain-wave turbulence (MWT).
Automated and gridded weather prediction information provided by the WAFCs' World Area Forecast System (WAFS) can be directly used by airlines for strategic flight planning including the avoidance of aviation weather hazards, particularly for long-haul flights (ICAO 2012).
It is designed to distribute essential World Area Forecast System (WAFS) products and global OPMET data to ATC desktops, and enables the Met Office-based WAFC (World Area Forecast Centre) London to distribute data to more than 90 ICAO states in Africa, Europe and western Asia--the rest of the world is covered by WAFC Washington, supported by the US National Weather Service.

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