UPDATE: At 3:10 p.m., the National Weather Service issued a flood advisory for the area.
"Heavy rainfall of 0.50 TO 0.75 inches will occur in one to two hours duration causing street flooding. Normally dry washes and creeks will also have rapidly rising water flow, and highways will have significant ponding of water," according to the NWS. The 15 Freeway will be impacted, the agency reported.
Hail up to the size of pennies is forecast for Southwest Riverside County and surrounding areas beginning around 3 p.m. Friday, the National Weather Service is reporting.
“The National Weather Service Doppler radar was tracking a line of strong thunderstorms heading into Southeast Orange County and into the Santa Ana Mountains. Western Riverside County will be impacted by these storms by 3 p.m.,” the NWS reported.
“Hail up to the size of pennies and wind gusts up to 50 mph are expected with this storm, along with heavy rain and frequent dangerous lightning.
“If threatening weather approaches your area, take shelter in a sturdy building,” the NWS report continued.