XC Weather suggests moderate winds from the SE; RASP suggests that it might be a bit stronger. But it's going to be cloudy for most of the day with low cloud/fog in the morning. The question is whether the cloud will lift sufficiently during the afternoon. The Mountain Weather forecast (https://www.metoffice.gov.uk/public/wea ... hire-dales) says:
Whernside launch is about 570m (1750') and Semer Water (shoulder) about 450m (1600'). RASP (CU Cloudbase (Sfc LCL) MSL) suggests a base between 1,000 - 2,000'.Chance of cloud-free mountain/hill tops at 600m
20% in the morning with extensive cloud, bases 400-600m, but becoming 70% early afternoon as cloud lifts for a while. Then 20% in evening with cloud becoming extensive again above 400m.
So there is a possibility of flying, but it isn't great. Depends on how desperate you are and if you're happy to lay your glider out on wet ground. If I were thinking about going out I'd head for Semer rather than Whernside. It's lower so less wind and a (slightly) higher base.
Anyone think I'm being too pessimistic?