The portion of Simi Valley where the Santa Susana Field Laboratory cleanup site is located could be subject to flash flooding through Tuesday as a so-called atmospheric river produces unusually heavy rains in Southern California, according to the National Weather Service.
It rained heavily over the weekend and there is a 100% chance of rain today in the Eastern Simi Valley that could produce another two-and-a-half inches of rain Monday and Monday night, according to the local forecast.
A flash flood warning is in effect today and a flood watch continues into Tuesday, according to the forecast. According to an Internet search, Simi Valley only averages about 18 inches of precipitation per year. Santa Susana is 30 miles from Los Angeles, which recorded its wettest day in years over the weekend, according to CNN.
“A strong Pacific storm system will bring impactful and dangerous flooding rains, heavy snow, strong winds, coastal flooding, and high surf to California,” the Weather Service said on its weather.gov home page.
Today there is also a flood watch and a wind advisory in effect at the Lawrence Livermore National Laboratory near San Francisco in Northern California. The Lawrence Livermore forecast calls for a 70% chance of rain today with new rainfall amounts of roughly an inch possible.
