In reply to Valkyrie1968:
There used* to be a pretty smart website for the Elbsandstein area (where climbing on wet sandstone is prohibited), using public meteo radar data**, crag database and crag aspect (and from that derived drying time, i.e. 12 hrs after rain, 2 days after rain, ...) to advise would-be goers before embarking on a trip where to go for a better chance of dry sandstone. As it was combined with a crag directory and nicely visualised, it probably worked quite well (especially during summer, with more localised storms) at promoting the issue and helping people choose where to go.
Perhaps something like that could be considered for some future version of the UKC Crag Directory? Obviously grit (and local ethics) is different from sandstone in Elbsandstein area, but If people can't be bothered to use common sense and last few days of weather forecasts or just don't know about possible issues, it's always better to just work along with the tendency of people to be lazy and make it easier to check!
Wouldn't even have to be as detailed (aspect and drying time) as that. Just a reminder - if there was any rain forecast at a specific crag location during the last few days - to check local conditions could be helpful...
* - not sure if it is still online
** - obviously a radar and numerical meteo models aren't always that accurate in how much actual rainfall a specific place gets and the crag could well be dry, but it still would work pretty well for planning a trip, no?
Post edited at 16:41