That's what puzzles me here, the north fetch on the Keweenaw is only about 40 nmi because of Isle Royale and it goes to about 60 on one side of IR to about double that on the other side. I did notice that the open lake WX is gales up to 50 kt. But I'm not used to seeing such large wave magnitudes for the in shore even at those wind speeds. The weather map doesn't look very special either. -mike > mike dziobak wrote: > >> Check out this forecast for the inshore waters south shore Lake >> Superior: > >> NATIONAL WEATHER SERVICE MARQUETTE MI 533 PM EDT TUE APR 3 2007 FOR >> WATERS WITHIN FIVE NAUTICAL MILES OF SHORE LSZ241-242-040600- .WED...N >> GALES TO 40 KT. SNOW SHOWERS. WAVES BUILDING TO 20 TO 25 FT. .WED >> NIGHT...NW GALES TO 35 KT. SNOW SHOWERS. WAVES 20 TO 25 FT. > >> I can't find my wind speed/wave height tables but is this even possible >> with only 40 kt gales? > > Yes. With sufficient fetch, the "observed average" produced by a > sustained > 35 knot gale runs about 20 ft [Bascom; Waves and Beaches; 1980 version; > page 48]. I suspect the "observed average" relates closely to the > "significant wave height" figure given by the buoy reports. > > -- > Dave Kruger > Astoria, OR > -- mike Dziobak Dept of Civil and Environmental Engineering Michigan Technological University 1400 Townsend Dr. 870 Dow Bldg. Houghton, MI 49931 Tel:906-487-3471 Fax:906-487-2943 *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Tue Apr 03 2007 - 19:05:29 PDT
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