Here in Nevada I am always

> amazed when so many of the Class A motorhome crowd continues to drive until
> they suffer damage, either by being overturned, or more frequently after a
> big blow, lose one of those expensive roll-out awnings. Always one or two
> of those along the highway the day after! Free canvas!
>
> Gary
>

  Same thing here in the Columbia Gorge.  Interstate 84 follows the
Columbia in to Portland along the river, winding around along, with
mountains and bluffs protruding.   Generally speaking, it is hot to the
east and cool to the west, and the cold marine layer pushes up against the
Cascade range.  The Gorge goes right through these mountains, the only sea
level breach of the range, so the high pressure to the west rushes through
to the eastern low pressure and creates spectacular winds.    The terrain
and the winding course of the river, followed on the Oregon bank by the
Interstate, that creates all kinds of swirling gusty super strong blasts
that far exceed the 'normal' Gorge winds, which blow all summer in the
20-60mph range.

  The RV crowd in their large powerful diesel class A mo-hos, or the ones
being pulled by powerful turbo diesel trucks....they are blasting along at
75-85mph, into headwinds in the 40-60 range...apparent wind is then well
over 100...which awnings and skylights that are 'RV quality' don't much
like.   There is debris all along the interstate almost every day...