This is intriguing Mikey. Looks like you have the chance for a lot of snow over the coming weeks.
I was leaning toward a MaxBotix high resolution outdoor sensor with temp compensation http://www.maxbotix.com/Ultrasonic_Sensors/MB7389.htm but I’m curious about the laser now. Do you have any charts between the 2 sensors to see how they perform comparatively for the same event?