How to read the HDD / CDD Chart

The region key can be seen in the image below:

Degree day regions

The color coding of the chart indicates percent change from average

over 30% Change

30% to 20% Change

20% to 10% Change

10% to 0% Change

No Change

-10% to 0% Change

-20% to -10% Change

-30% to -20% Change

under -30% Change

In each of row you will see a set of numbers presented in this form:

1 | 2 | 3 | 4 | 5

The first number indicates what the forecast is for that day, today. The second number indicates what the forecast was for that day, a day ago. The third number indicates what the forecast for that day was, two days ego, etc.