I made a chart comparing the data for the last three springs. Series 1 is 2010, Series 2 is 2011 and Series 3 is 2012. 2010 and 2011 are for 1 Feb to 1 May, while 2012 is from 1 Feb to today.



You can see that although the water was a lot warmer earlier in the month than it has been the last two years, it really isn't very far ahead of last year.