So i am going to Yosemite soon and have been looking at the weather forecast. Should we be concerned when it lists 5-7% chance of rain? Also, if it is raining in the valley, what options are there for climbing outside elsewhere that is close?
My rule of thumb: -10% good to go -20% check every hour but still plan on your climb -30% it's gonna rain and I have a fear of lightning
Agree. I'll add that if the rain is thunderstorm related, then I'll go even if its 30-50% because the rain is usually short and predictable. Most thunderstorms come in the afternoon and are out by the evening, leaving a full morning/early afternoon of climbing and dry nights. Also, its even less likely that the thunderstorms penetrate past El Cap (the mouth of the Valley may stay dry).
Lightening isn't really an issue in the Valley like it is in the Meadows (cause you're not usually topping out on things)