Snow Day Formula

Version 3.0 of our homemade Snowday Chance Formula.
Copyright 2011-2013 The Weather Centre

How it Works: 
Each question has points- 1, 2, 3 or 4. The more points you have at the end indicates a higher likelihood of a snow day.

Question 1: When will it be snowing?
1. After 9:00 AM
2. After 3:00 PM
3. After 9:00 PM
4. After 3:00 AM

Question 2: How Windy will it be? (OPTIONAL Factor, does not need to be included if it is not windy)
1. Calm.
2. 1-5 MPH
3. 5-10 MPH
4. 10-15+ MPH

Question 3: How Much Snow will fall?
1. 1-3 inches
2. 3-6 inches
3. 6-12 inches
4. 12+ inches

Question 4: Will the snow be wet or heavy?
2. Very Light, Powdery
3. Average
4. Very Heavy

Question 5: How fast will the snow be falling?
1. Very lightly.
2. Moderate; possibly 1 inch/hour
3. Heavy; over 1 inch/hour
4. Very heavily; extreme hourly snow rates

Question 6: Have you had snow days in the past?
1. No
2. Not Many
3. Some
4. A Lot (3 or more a year)

Question 7: How is the storm being hyped?
1. No one is talking about it.
2. Hearing talk among people.
3. News is talking about it.
4. Everyone is talking about it.

Question 8: How low will visibilities be?
1. High, you can see miles away.
2. Fair, cannot see a great distance away.
3. Low, visibility under 3 miles.
4. Very low, under 1 mile at times.

Question 9: How will traffic be?
1. Good, little interruption.
2. Fair, some back-ups, nothing major.
3. Bad, traffic is sometimes bumper-to-bumper.
4. Horrible, no one is moving for over half an hour.


Will You Have a Snow Day?
33-36 points: Probably/Likely.
29-32 points: Good Chance.
21-28 points: Chance.
13-20 points: Not Likely.
0-12 points: Near zero chance.

•Do not use for lake effect snow.
•This is just a formula and is not 100% accurate.
•Do not use if your area does not often get snow (i.e. Southern US).
•Wind is an option. If it will snow heavily but with no wind, that does not mean you will not get a snowday.