While most rides at the Park would only close during electrical storms, the Alpine Slide would close at the first sign of precipitation. Even the slightest bit of water would send carts careening of the tracks. Not that people didn't careen off the tracks when they were dry, but that's another matter.
Most of the time, the attendants would stay in the ride area and wait for the rain to stop. If you were at the top of the Slide, you were basically stuck there. If you were at the bottom, you had more options. Which brings me to the following exchange, heard over the Park's Channel 9 one afternoon, after a rain delay:
"Alpine top to Alpine bottom, copy?"
"Alpine Pizza to Alpine top, go ahead."
"Hey Brett, what time do you think we'll be able to open.... Wait, whuuuuut?"
Luckily, they brought pizza back for the top attendants, thus averting a mutiny.