River Widowmaker dynamics
 

I live in Portland, Oregon, which is on the junction of two large
rivers......the mighty Columbia and the Willamette. Downtown Portland is on
the Willamette. Anyway, often the Willamette is a debris minefield, and
last Sunday evening was no exception. We had to slow to 5 mph to safely
navigate patches of it.

This morning, returning on the Willamette to our boathouse on the Columbia,
we scarcely saw a stick. Why? There was little weather to speak of, so
run-off couldn't been a factor. I'm wondering if the time of day has
something to do with it. River traffic stirring up the stuff.

-Greg