I've got a pretty good memory of most storms, but I definitely lost track of some of the ones I had in Elementary and a few in Junior High. There are some where I have memories, but just can't put my finger on the date. I'm sure if I dug around a little I'd remember.
That said, there are probably several that I remember every single detail. Jan '96, April Fool's '97, Jan '05 and Dec '05. I still remember how it just hit like a big bag of WTF within seconds.