Aviation Guide

Introduction
Fog
Icing
Dust & Volcanic ash
Storm & Convection
Turbulence
Wind

Introduction

This guide explains the NWC SAF products from a practical point of view, when used in an aeronautic forecasting environment. It should be useful for aeronautic forecasters and aviation users. The main objective of this guide is to highlight the main meteorological phenomenons which are harmful to aviation and how to use each NWC SAF product to detect them, as well as its limitations.

Fog

Phenomena	Product	Meteorological Context
Fog	CT/CMIC/CTTH	Diagnose cloud characteristics, top height and liquid content.

Icing

Phenomena	Product	Meteorological Context
Icing	RDT	Screens which storms have high-altitude icing risk associated.
	CTTH/CMIC	Combined cloud top temperature and phase can diagnose classical icing.
	CRR	As heavy rain comes from cumulonimbus and towering cumulus it gives an idea of areas of possible icing associated with these clouds.

Dust & Volcanic ash

Phenomena	Product	Meteorological Context
Dust and Volcanic ash	CMA	Diagnoses thick dust events or significant volcanic eruptions.

Storms & Convection

Phenomena	Product	Meteorological Context
Storms and Convection	CMIC	Identification of cloud top glaciation.
	CRR	Diagnoses rainfall associated with convection.
	CI	Probability for a cloudy pixel to become a thunderstorm.
	iSHAI	Diagnoses instability indexes, moisture and deviations against NWP.
	RDT	Information and trajectory forecast on clouds related to significant convective systems: extension, overshooting tops, high icing.

Turbulence

Phenomena	Product	Meteorological Context
Turbulence	RDT	Turbulence associated with developed storms.
	HRW	Turbulence associated with high wind shear and high wind speed.
	ASII-TF	Turbulence associated with tropopause folds.
	ASII-GW	Context where turbulence can appear, if the gravity waves break.
	CRR	As heavy rain comes from cumulonimbus and towering cumulus it gives an idea of areas of turbulence associated with these clouds.

Wind

Phenomena	Product	Meteorological Context
Wind	HRW	Warning of dangerous wind situations.
		Monitoring of wind convergence/divergence.
		Monitoring of the general atmospheric flow, of small scale circulation and of wind singularities at the different pressure/flight levels.