how much rain is 18mm?

[tyaca]

Just bought tickets for Camp Bestival this weekend. Had been waiting for weather forecast before we committed to spending the money, forecasts were looking okay and yesterday we decided to go.

Just checked forecast again and now it seems that 18mm of rain is predicted for the Saturday. That does not sound good, does it?

That is pretty soggy. However, I dont think the totals will be that high. Still looking damp though.

thanks OYBBK, weather forecast seems to be getting a bit better.

Saturday looks a lot better now - partly cloudy :) Sunday looks as though it will start dry, perhaps rain later.

Er, 18mm.