Bump on this for the reasons listed above - being able to add a "no rain predicted" condition would be helpful for determining paragliding conditions at a range of sites, thanks - awesome work by the way guys, Windy is the best!
You are right. Just a coordinate error.
Great Dun Fell correct coordinates are
N 54°40’ - W 2°27’
the weather station on Windy is shown
N 51°40’ - W 2°27’
One figure to change !