Have you ever heard of something called "Mammatus Clouds"? Until last night, I hadn't. But, after a crazy severe thunderstorm, my husband looked up and, with his iPhone, snapped this shot:
According to Wikipedia: "When occurring in cumulonimbus, mammatus are often indicative of a particularly strong storm or maybe even a tornadic storm." In our case, a tornado had touched down just a few kilometers out of town and we experienced perhaps the most severe thunderstorm I can remember. I guess the conditions were perfect to create these cool clouds extending over the entire city. It was magnificent to behold! And now you know what Mammatus clouds are! LOL!