I usually walk around Tamar Lake 3 or 4 times a week and over the last two or three months the lake level has been getting lower and lower (it's a reservoir lake created behind a dam on the River Tamar.) At the top mud flats appeared and these had actually grassed over !! much to the delight of the Canadian Geese that live there. In fact I've never seen it that low, a good four or five feet below the dam spillover.
Then last week we got a couple of days of thunderstorms and their torrential downpours and I was very surprised last Sunday to see the lake spilling over the dam, the mud flats all disappeared and the Carp fishermen all having to back up onto the banks. Not something you expect in late July.
More rain today, I can practically hear my lawn growing. The synoptic chart looks more like February or March than July ...
http://www.newquayweather.com/wxisobars.php