cloud-to-cloud.

Cloud-to-ground.

Intra cloud.

Cloud-to-Air.

Rime ice covers the fuselage on all sides, preventing detection.

with hoar frost the aerodynamic contour of the aerofoil appears to be unchanged.

During flight, mixed ice is invisible on white surfaces.

Clear ice accretes mainly on the trailing edges of aircraft parts.

At cruising altitude for the first 600 NM after initial climb.

Clear for the first 1500 NM or so and then likely for the rest of the cruise.

It is NOT expected to encounter a high concentration at cruising altitude on this route.

At cruising altitude for the last 600 NM before descent.

A Rough terrain and a clear warm night.

strong winds and rough terrain.

When the ambient pressure is very low.

With katabatic winds.

Ice crystal icing forms at low altitudes and is usually associated with a Cb. It can affect all aircraft.

ice crystals are not very likely to form ice. Ice crystals need a nucleus to form, which is hardly found at high

Ice crystal icing events are still under investigation and cloud avoidance is required.

 Ice crystal icing forms at high altitudes and is usually associated with the anvil of a cb. A high accumulation

2,3 and 1

5,6 and 2,3

2,3 and 5,6

4 and 5,6

on the cold air side of the jet stream core.

in the jet stream core.

on the warm air side of the jet stream core.

about 10000 ft above the jet stream core.

Nimbostratus.

Altocumulus.

Altocumulus Lenticularis.

Cumulus Humilis.

Severe turbulence in area E, microbursts in area F, and severe icing in area A.

Severe icing in area A, lightning in area C, and severe wind shear in area H.

Severe icing in area E, a gust front in area F, and microbursts in area H.

Lightning in area D, a gust front in area G, and clear ice in area B.