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A late-season Pacific storm system is rolling across Southern California, delivering much-needed rain to Los Angeles and San Diego. Snow is falling over a few of the higher mountain ridges of interior southern California.

An upper-level system moving northeast from the Pacific Ocean will move across southwestern California and into the Four Corners tonight. Tapping the ocean moisture, this system has already brought rain to the San Diego area with even a few thunderstorms firing off. Coastal locations have already received about 0.25 to 0.50 inches of rain, and the western-facing slopes of the inland mountains could receive upwards of an inch of rain.

Up the coast into the Los Angeles basin, the precipitation has been spottier, with scattered showers and a few thunderstorms. In general, rainfall totals have been less than a quarter inch. However, the highest mountains north and east of Los Angeles and San Diego are seeing the snow pile up. This snow will likely continue to fall well above pass levels, so major winter travel issues aren’t expected. Winter Weather Advisories are in effect for this afternoon and evening above 5,000 feet of elevation.

Valley rain and mountain snow will push into the Four Corners overnight and into the central Rockies by the morning. While only a dusting to a couple of inches of snow are possible for cities such as Flagstaff, Ariz., and Salt Lake City, the high elevations of southwestern Colorado and north-central New Mexico are under Winter Weather Advisories for up to 10 inches of snow.

Areas across the central High Plains, including Denver, shoud see plain rain for Thursday before the same system delivers a wet end to the week for parts of the South.

Southern California, along with the entire Southwest are locked in severe drought conditions because of the rainfall deficit seen for much of 2020 and the first several months of 2021. February was a very dry month with only 0.10 inches recorded in San Diego while Los Angeles only received 0.02 inches of rainfall. This rain will be beneficial, but if will take many more of these type of systems to pull the areas out of its current drought situation.

The system producing the rain will quick dart into the Southwest, bringing an end to the rainfall potential there.

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Rain, Snow Move Across Southwest