Here in Hull we are in the rain shadow of the Pennines, but 10 miles to the
west of me are the Yorkshire Wolds. The height of these hills range from
500-800 ft. Do these hills provide an extra "defence" for Hull or are they
too low? And if they are too low is there a specific height a hill(s) should
be before a rain shadow occurs or does the cloud base height make the
difference?

Regards
Mag