Diablo wind is a name that has been occasionally used for the hot, dry offshore wind from the northeast that typically occurs in the San Francisco Bay Area of Northern California during the spring and fall. The same wind pattern also affects other parts of California's coastal ranges. The term was first used by local news media during and after the 1991 Oakland firestorm, to distinguish it from the comparable, and more familiar, hot dry wind in Southern California known as the Santa Ana wind. While the Diablo occurs in both the spring and fall, it is most dangerous in the fall when vegetation is at its driest.