There's a scientific way to find out whether or not you are going to have a snow day tomorrow.

Just go to and enter your zip code and the amount of days your school district allocates as snow days.

What you get looks like this:

When he was in middle school, David Sukhin started a journal of weather data.  He quickly realized that he could make school snow day predictions based on that data he had collected.  Years later, he created this website to provide hope to students and teachers who are looking for a day off.  The site gets about 250,000 visitors each time there is a snow storm.