California is in for a mixed bag of weather this week, with considerable temperature swings , a couple shots at rain and thunderstorms, and potentially some spring snow in the Sierra Nevada.
The unsettled weather pattern will be promoted by several slow-moving low-pressure systems in proximity to California. During winter, these low-pressure systems can evolve into full-blown storms that cause heavy rain and strong wind. Impacts from weaker springtime systems are less dramatic, enhancing or disturbing the coastal marine layer while simultaneously providing energy for valley and mountain thunderstorms.
That will be the case this week as an area of low pressure cuts off from the jet stream’s guiding winds and meanders along the Southern California coast. This area of low pressure will result in a resurgent marine layer that will drop temperatures from San Francisco to San Diego, specifically Tuesday onward.
Temperatures will generally be in the 60s Tuesday through Friday in Los Angeles and San Diego, about 5 to 10 degrees below average for mid-April. Plenty of low stratus clouds will accompany the cooler conditions…