Yes, it did happen once. I know, because I was heading out to Disneyland in the 1987 to pick up a Christmas gift for a friend. The rains were torrential all week (much like this week is supposed to be), but I braved the storm, drove the 45+ minute drive in pounding thunderstorm, only to be greeted by a large "Disneyland Closed" sign. I couldn't believe it! With no other choice, I went right back home, and sure enough on the news, they reported it was the first time Disneyland had closed due to weather in something like over 10 years or more.
Don't believe me? Read about it here (scroll down to the year 1987): http://www.examiner.com/x-4645-Wilmington-Weather-Examiner~y2009m12d15-Weather-History-December-16-Record-Warm-Cold-Snowstorm-Ice-Windstorm--SuperTyphoon-Paka
So it's happened before. Does anyone else remember this? Do you have a story to share about it? And could it happen again?