National marine weather guide

The National Marine Weather Guide is intended to provide mariners of all levels of ability with practical information and advice on safe navigation on the wide range of weather conditions they may encounter while travelling in Canadian waters.

The Introduction explains the basics of how to read a weather map and interpret forecasts, provides an overview of the effects of physical geography on local weather conditions, and discusses the role of mariners in the forecast process. A section on marine meteorology explains basic meteorological concepts.

The Guide itself is divided into two sections: Meteorology 101 and Regional Weather. The first section includes this chapter and five others focused on wind, sea state, fog, ice, and other hazardous weather. The second section offers detailed information on local weather conditions in the Atlantic, Pacific, Ontario, St. Lawrence/Quebec, Prairie, and Arctic regions.

Example of one of the graphics depicting a meteorological concept.

Example of one of the graphics depicting a meteorological concept.

It is essential that the Mariner understands all of the meteorological concepts in MET 101 in order to fully understand the regional guides.

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