I am happy to report that I have expereinced many whooshes... A few things I have noticed in common prior to one:

If I skip lunch on the weekends (because I'm busy and running around) I almost always get a whoosh on Monday/Tuesday.

Plus, I ALWAYS get a bump up before a whoosh! If I feel as though I've lost weight and I get on the scale but find my weight up a pound or two, it is ALWAYS followed by a whoosh. I can't explain it, but it's why I don't freak out if I get a higher reading when I know I've been a LC angel becasue it means a whoosh is on its way!

Good luck...

Donald