 While the storm was weakening, a cold front lifted deep tropical moisture that triggered flash flooding and severe weather in the Mojave Desert. In San Diego County, California, a severe thunderstorm rolled through the area midday on September 5, breaking 19 pipelines and causing $ 100,000 in damage. Major flooding also occurred east of Barnwell on Ceader Canyon Road. South of Barnwell, hail and rainfall up to 1 in (25 mm) was reported. At the Nipton trading post, water and debris flowed on the roads. Flooding occurred on Interstate 15, forcing the local highway patrol to escort cars on to the highway while part of U.S. Highway 95 was closed for 2 hours, and 17 minutes. Near the town of Ocotillo Wells, flash flooding was reported due to heavy rainfall, causing an additional $ 20,000 in damage. Strong winds associated with the thunderstorms downed power lines and resulted in dust storms across the Imperial Valley, some of which reduced visibility by up to 25 %.
