IEM Daily Feature
Wednesday, 16 September 2015

September Slide

Posted: 16 Sep 2015 05:40 AM

The featured chart displays three daily climatology datasets. Every ten years, the National Center for Environmental Information (formerly NCDC) produces a 30 year climatology. Those values for 1971-2000 and 1981-2010 are shown on the chart along with the raw daily averages based on the period of record computed by the IEM. On an individual day there are differences in these three datasets, so which one is right? The answer is they all are! The NCEI climatologies are smoothed to remove day to day variability that results from a 30 year sample size.

Good = 15
Bad = 11
Abstain = 5

Tags:   climate