I found this story on Mouse House Magic.com Forum
"This one I found beautiful...I was talking to a Cast Member that gives tours. He was telling me little things here and there when he lit up and teared a bit. (I will never do this story the justice it requires so bear with me...)The morning the Walt died he was supposed to lead the Disneyland parade. Employees, not sure what to do about this called Mrs. Disney. Even though she was filled with grief, she said Walt would want things to go on, and decided to open the park as normal. So the park opened and things went normally. Some people knew of the death but others had no idea and lined up to see Walt lead the parade as normal. Mind you, weather at DL had always been tracked and recorded - not once had there ever been snow. Anyway, the parade started without a hitch. Employees went on and tried their best to keep tears from falling as the parade went on. Just about the middle of the parade, a strange thing happened... From the cold air and cloudy skies, beautiful white dust fell softly. It snowed. This had to be a sign that Walt was there and watching. Ever since then it has not snowed. But, as the CM I was talking to cried while telling the story, he said it was then made a point that snow would fall during the Christmas season to always remember Walt's last touch on DL."
This was the first I had heard of this but I did a little investigation. I went to the Farmers Almanac on line and searched the weather report for the day of Walt Disney's death. (12-15-1966) Sure enough it said "Rain and/or melted snow reported during the day." I lived in the Anaheim California area for 32 years and it never snowed or even came close. That is so rare for the area. When I found this info I was amazed! What a beautiful story!