By Reginald Stanley. Posted March 31, 2026, 10:34 PM.

Cloudy skies and a deep marine layer loomed over Southern California on Tuesday, as a weak low pressure system finally brings relief from the anomalous heat that had gripped the region for the entirety of March.

Precipitation from this storm is expected to be light, and more concentrated over mountain and foothill areas. At the time of this writing, WeatherCurrents stations in Pinon Hills, Riverside (Canyon Crest) and Simi Valley had recorded measurable precipitation. Totals are forecast to reach no more than 0.10 inches across the valleys and coasts through Wednesday, while up to 0.25 inches is possible in the mountains. Snow levels will hover around 7000-7500 feet above sea level Wednesday morning, as the storm quickly departs the region to the east. Cool temperatures, about 3-5 degrees below average for this time of year, will continue through Thursday before offshore flow develops for Friday and Saturday.