The Alaskan Snow Storm is when you are having sex with a woman and there's a pre-determined location that she wants you to come. When you are about to come, you pull out and position where she wants it. So she waits for it and the last second you gowild and ejaculate all over her.
Dude: So, My girlfriend got the Alaskan Snow Storm again.
Dude2: Man, I can't believe you did that again, you're such a bastard.
When a slut is on her knees surrounded by a circle of muscular men (or former pro wrestlers) who jerk off and blow their loads all over her like it's snowing.
Christen waited for the WWE to come to town, then she snuck backstage for a "hulk hogan snow shower".