It seems as though it hasn't rained in a long time, but August is typically the driest summer month, only dropping 2.1 inches of rain in Madison on average. It rained overnight on August 7th, but other than that it has been a hot and dry couple of weeks. The late summer humidity is trying hard to produce giant thunderheads like this one, known as cumulonimbus clouds. Cumulus clouds are the big puffy ones that move across the sky in groups and look like gumby or a cat or your great uncle. When humidity reaches them and condenses the clouds will grow and become denser, blocking more sunlight and starting to look very dark to us below. When the moisture is too heavy for the cloud, down it falls onto us. And hopefully the precipitation is accompanied by supercharged cracks in air pressure, sending electricity through the vacuum and breaking the sound barrier to produce thunder. I'm hopeful for a storm soon.
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