IEM Daily Feature
Tuesday, 15 May 2012

Positive GDD Departures

Posted: 15 May 2012 05:51 AM

With the growing season well under way, a useful metric to look at our progress is called growing degree days. The featured chart presents the departure from climatology for GDD accumulations over time periods since the first of the year. Each bar represents the departure from that date until now. So since the beginning of the month, we are up 50 units and since the beginning of the year, we are up over 300 units. The right hand axis expresses these departures in terms of average 15 May days. So since the first of April, we are about a week ahead of schedule.

Good = 27
Bad = 5