A tropical depression forms when a low-pressure area is accompanied by thunderstorms that produce a circular wind flow with maximum sustained winds below 39 miles per hour. "Tropical-storm-force winds extend outward up to 35 miles [55 km] from the center".
California wildfire kills one person, shuts I-5 lanes
The so-called Klamathon fire had covered 9,600 acres and was only 5 percent contained , Cal Fire officials said Friday evening . The fire, which started Saturday east of Lake Berryessa, has caused no injuries or deaths, but destroyed nine structures.