Definitely agree on getting off the water if there is lightning around. Found a cool website a few day ago:
http://www.blitzortung.org/Webpages/index.php?lang=en&page_0=30It is a live feed of where lightning strikes are occurring. It seems to be community based and you can buy a sensor to mount at your house to track lightning. The webpage isn't great as you can't zoom in to a specific area, but there is this one which uses the data from the first:
http://www.lightningmaps.org/realtime?lang=enI should have hopped on this last night during the storm, would have been cool to watch.