speedster on 5/22/2012 6:23:36 PM:
My thinking is to pack a raincoat and cover your gear/pannier with a piece of tarp and pretty much try continuing as planned.
Rain is tough to totally avoid on any multi-day tour, so best to be prepared. Even on many 2 day tours I've ridden, its been almost impossible to avoid the dreaded rain. On this particular tour I'm referring to, it included 3 previous weekends of packing and cancelling last minute due to unfavourable conditions.
The week I finally decided on when clear conditions were called for, it still rained most of the time!
Some people on here will tell you your best strategy is to camp longer and wait it out. Not me though. Typically, you've already gotten wet since rain doesn't time out as your reach your campsite for the night or when cover is near. Taking a rest day to dry out seems wasteful to my sensibilites, your gear will actually dry faster in the wind riding!
If its a total lightning storm, obviously use your good sense, but light showers and stuff of that nature, I've personally always opted to push onward (sometimes due to time restirctions on when I've needed to be back).
I'm sure many others will say to pack down for a while and wait, but I just find in some cases, with time the conditions may actual worsen or stay in a wet pattern for a week or more. Then what! At some point you have to brave the conditions..