Hi, I'm with UNCC and we are thinking of doing illusion pot on Sunday. We are aware that it takes a while to drain and are wondering if people would recommend going down tomorrow?
Can't directly answer your question but, in case it helps, the west side of the Dales has been a lot drier than other parts of the country lately. Ony 4 mm of rain in a gauge near Clapham spread over the last three days. (Storm Ciaran beforehand didn't really drop that much rain, compared with elsewhere.)
You may be aware of it already but the CDG have a page with the results of several rain gauges on it (Including the one in Clapham). It's a very helpful resource to get an idea of recent rainfall.