Currents of the Great Lakes
More than 100 years ago the Weather Service charted prevailing currents in all of the Great Lakes. Today's satellite-based analyisys and imagery bring up to the minute information on Great Lakes currents to everyone for both cruise and race planning. Interestingly, the century-old analyses, current observations by Great Lakes Mariners over the years, and today's regularly-updated satellite-based current data are all in remarkable alignnment. Prevailing winds and the outflow of water to the ocean effect these systems. Where currents exist their speed can reach from one to as much as four knots, more than sufficient to influence both passage times and fuel economy.
Using both historic analyses and modern satelite imagery, experienced Great Lakes sailor, Niels Jensen, explains the prevailing currents in each of the five Great Lakes in this significantly updated webinar based on today's latest imaging technology. Boaters engaging in long-distance Great Lakes cruising, as well as sailboat racing, will find today's on-line current charts of particular interest. In addition to their affect on passage times, Niels will examine how currents also interact with winds to create certain wave phenomena. The best known of these is the wind-against-current situation, which can quickly generate dangerous conditions that, for the comfort and safety of their crew, captains of small recreational craft should well understand.