An hour and a half after I left for work today a wildfire broke out near El Portal, CA, west of Yosemite National Park. It did not take long for it to blow up into a firestorm with a spectacular pyocumulus cloud with a pileus cloud cap. From Turtleback Dome Webcam #2 the following sequence of images was captured today. I find it fascinating to see how fast the El Portal Fire exploded out of nowhere and in how short a time this fire became established. As of this posting the fire is pegged at about 2,100 acres charred with no containment, plenty of evacuations and reports of structures lost already.