220 PM PDT Thu Aug 16 2018 Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Acton, Mount Wilson, and Sandberg 220 PM PDT Thu Aug 16 2018 .NOW... At 215 PM PDT, Doppler Weather RADAR was showing scattered showers and thunderstorms over the San Gabriel Mountains. This activity was nearly stationary. Thunderstorms will produce locally heavy rain, gusty winds and dangerous cloud-to-ground lightning. Localized minor flooding of roadways will also be possible, such as along parts of the Angeles Crest Highway. Additional showers and thunderstorms are likely to develop through the afternoon.