A reinforcing surge of monsoonal moisture will move into the area tonight and Friday, bringing a continued threat of thunderstorms through Sunday. The LA county mountains and the Antelope Valley are the areas most likely to see this weather, however there is a slight chance for the Ventura County Mountains as well. The interior valleys of Los Angeles and Ventura counties could also see thunderstorms on Friday, as there is a slight chance that any thunderstorms that do develop over the mountains will drift to the southeast. Some of the interior valleys that could be impacted include the San Gabriel, San Fernando, Santa Clarita Valleys. Stay tuned here for latest forecast or through http://www.weather.gov/losangeles, NOAA Weather Radio.