In reply to HenryC:
Tomorrow looks to be another dull misty day, it prob won't rain much but I wouldn't expect to see much if any sun either, so not very good drying conditions, however there might be a few dry holds at Bowles although wouldn't expect there to be any routes/problems completely dry.
Harrison's takes a lot of drainage, next time you are there look at the slope of the woodland above, not steep but it does all slope down to the crag. The land behind Bowles does slope away from the crag, going someway to explain why it is often drier there. Although at the moment even most/all of the isolated boulders are soaked due to the porous nature of sandstone.
As others have said be careful of the holds whilst damp. There's few if any holds to break in the chimneys and they are always damp and slimy so perhaps it's a good time to break out the boiler suit
Robin