If outdoors, consider seeking shelter inside a building.

At 534 PM PDT, Doppler radar was tracking a strong thunderstorm over Norco, or near Ontario, moving southeast at 5 mph. HAZARD...Winds in excess of 30 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Riverside, Fontana, Ontario, Corona, Chino, Perris, Norco, Woodcrest, Pedley, Lake Mathews, Rubidoux, Temescal Valley, Glen Avon, Eastvale, Eagle Valley, Mira Loma, El Cerrito, and Home Gardens.