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Onglets principaux

Offshore marine weather forecast- Level 2


You have acquired in level 1 a knowledge of the general functioning of weather systems.

You will now expand your knowledge by dealing with local site effects that can make navigation more difficult. You will also increase your scientific knowledge to better predict the arrival of violent episodic phenomena that you would rather avoid.


DAY 1 – 9 AM – 12.30 AM


Classification of weather phenomena, meteorological scales.

Structure of the atmosphere. Characteristics and rôle of the troposphere on oceanic meteorology.

The Language of clouds. Knowing how to recognize the different types of clouds and their characteristics.


DAY 1 – 2 PM – 5 PM

Stability of air masses. Associating a wind regime with a weather situation.

Thermal effects. Thermal breezes, their location, local characteristics and establishment conditions.

Thermal lows.

Currents: Tidal currents, coastal effects, sources and reading of associated files.


DAY 2 – 9 AM – 12.30 AM


The swell: significant height, propagation, modification of the characteristics near the coast, shoals, counter currents.

Site effects: wind modification by venturi effect, peak effect, katabatic winds.

HIRES grib files: notion of high resolution, acquisition, use and characteristics of Squid sailing, Predictwind, Windy applications.

Mesoscale phenomena: characteristics of squalls, speed and displacement, squall lines, thunderstorms.


DAY 2 – 2 PM – 5 PM

Micro-scale phenomena. Local effects on the size of a body of water, turbulence, gusts

Details of navigation basins. Bay of Biscay, Mediterranean Sea.

Routing: preparation, operating procedure, interpretation of results

Practical work.