I had some GREAT thunderstorm rain samples I recorded myself at like 3am so no cars were driving near me... I'm having difficulty locating the file though so if I can't find it next storm ill record... no telling when that'll be though...
Search for "sound of nature" it's a pack i downloaded.. somewhere.
It's got a couple of rain / thunder storm clips that are pretty long, plus rivers, birds and critters and whatnot, no whale song though, which is a bit disappointing.