By Reginald Stanley. Posted March 24, 2020, 3:42 AM.

Yet another cutoff low brought more showers to an already rain-soaked region late Sunday night and Monday morning, adding to a wet March this year in Southern California.

Wrap-around moisture associated with a cutoff low began delivering rain to the region late Sunday evening, first hitting the communities of Simi Valley and Pinon Hills to the north particularly hard. Heavier precipitation began affecting the Inland Empire after 8 PM Sunday, continuing into early Monday morning before the bulk of the precipitation moved to the north. A small squall line formed over southwestern Riverside County and San Diego County shortly after midnight Monday, resulting in short-lived but heavy rainfall. A final round of heavy rain passed over the region later Monday morning, before residual moisture left the region entirely later that day.

Precipitation totals varied considerably once again, however some of the wettest locations during this storm had received comparatively little rainfall only days earlier - two notable examples include Pinon Hills and Simi Valley. Pinon Hills recorded the highest total out of the entire WeatherCurrents network Monday, an impressive 2.01 inches - compared to no measurable precipitation at all during the storm that lasted from March 18-20. Pinon Hills, located on the rain shadowed northern side of the San Gabriel Mountains facing the Antelope Valley, often receives some of the lower storm totals in the WeatherCurrents network. Simi Valley, which had recorded only 0.02 inches during the previous storm, received a significant 1.01 inches by Monday morning. Fallbrook and Wildomar also managed to exceed 1 inch for the storm, as well as Yucaipa with a total of 1.05 inches (courtesy of Don Kramer). A total of 0.99 inches was reported in Temecula Valley's Wine Country (courtesy of Jim Sappington), as well as 0.94 inches reported in East Highland (courtesy of Peter Michas).

The eastern valleys fared somewhat drier in general, with the exception of Moreno Valley and Perris. Similar to the previous storm, significantly differing precipitation totals were observed across short distances in some locations - namely Riverside, where 0.86 inches was recorded in Presidential Park, while only 0.48 inches fell in Orangecrest. This phenomenon was also observed in De Luz and Fallbrook, which typically receive similar totals due to their location in the southern Santa Ana Mountain foothills. A difference of 0.40 inches between WeatherCurrents' stations in Fallbrook (where 1.10 inches was recorded) and De Luz (where 0.70 inches was recorded). WeatherCurrents' station in Anza had experienced a problem with the rain gauge, which had failed to register any measurable rainfall, and the total will be corrected there shortly. San Jacinto recorded the lowest total by Monday, with only 0.39 inches.

Here are the rain totals for the WeatherCurrents network and associates: