“There are 200 different definitions of drought,” said climatologist Bill Patzert. “If you’re a firefighter with no rain in the month of October, and there are strong Diablo and Santa Ana winds, it’s a drought.”

Southern California got no rain during October, and it was desiccated by super-dry Santa Ana winds.

The jet stream that fed cold air into the Great Basin last week, fueling strong Diablo and Santa Ana winds in California, could have been delivering the first rain storms of the season from the Gulf of Alaska if it had been positioned about 500 miles to the west.