The storm hit northern California on Thursday, November 21. On Tuesday, the storm had already transformed into a "bomb cyclone", becoming even more intense on the west coast of the United States. According to the National Weather Service in Medford,

An explosively intensifying low pressure system, commonly called a “bomb cyclone,” is about to hit Ireland, Scotland and England. Heavy snow, strong winds and a sudden thaw are expected, with the United Kingdom Met Office expecting a disruption to commerce and travel.

One of the year's most important holidays is fast approaching, as is a dangerous storm that could threaten parts of the country.