Several of you have noted that it is not the cool temperatures or even the rain that bothered you this last few months, but the lack of sunlight–sort of like a summer version of seasonal affective disorder (SAD). So what is the truth about clouds this spring and summer?In such situations there is ONE expert on our local murk that I trust, a local scientist who has spent great time looking a the climatology and trends of local clouds. I have mentioned him before—Dr. Jim Johnstone, AKA Dr. Fog, a researcher here at the UW.
Here are some of his depressing results–the average number of hours a day with clouds at Sea-Tac for April through June 2010 and 2011 have simply been the worst over the past 60 years. We are talking about 18-19 hrs a day of cloud on average. And the general trend the last few decades is for more clouds.