NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Great Lakes Currents
From: Frank Reed CT
Date: 2006 Jun 7, 19:06 EDT
From: Frank Reed CT
Date: 2006 Jun 7, 19:06 EDT
"John Rousmaniere mentions seiche motions causing currents up to 2 knots on the great lakes." This primarily applies to Lake Erie. Erie has significant seiches more or less continuously. All lakes have natural frequencies and are therefore prone to seiches but lakes aligned with the typical direction of the weather (east-west in the Great Lakes region) with natural frequencies near 12 or 24 hours, the basic frequency of daily weather, experience natural cycles that are almost as regular as ocean tides. Lake Michigan sees noticeable seiches much more rarely since it is aligned north-south. There was a big one back in 1954 that drowned some fishermen. -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
