Ahhhh . . . a snow day in Chicago.  My son came how excited to report that school has been canceled at Latin School of Chicago tomorrow.  This is the first snow day they have had in 12 years.  And while my daughter is the one and only student at Ferguson Academy (home school), when her brother gets a snow day, she gets a snow day as well.  So needless to say, we have some happy kids in the Ferguson house tonight. 

Now, it's time to settle in and try to guess how much snow we will actually get in the next day or two.  In 1967 it was over 20 inches.  In 1979 it was a little over 18 inches.  In 1999 it was more than 21 inches.  So, how much snow will the Blizzard of 2011 leave on Chicago?  Take a guess.   The person who is closest to the actual total will receive a free copy of Exponential or The Big Idea.  Your pick.  Oh, and if there is more than one right answer, whoever leaves the correct answer first, gets the free book.