Cooler weather, storms forecast this week in San Diego County

A shift in weather patterns will bring cooler conditions and a chance of afternoon storms to the region this week according to the National Weather System Temperatures Tuesday are expected to reach near the coast to inland tp in the western valleys to near the foothills to in the mountains and to in the deserts High pressure is expected to weaken Tuesday into Wednesday leading to temperatures to degrees below normal in the valleys By Thursday and Friday a weak upper-level low from the south will draw in monsoonal moisture increasing the promising for afternoon showers and thunderstorms especially across mountain and high desert areas The greatest storm chances are expected Friday the NWS explained Moisture levels and storm chances will gradually decline over the weekend according to meteorologists Meanwhile night and morning coastal low clouds are forecast to spread into western valleys each evening