Updated Monday evening.
Rain from tropical storm likely to continue across Southwestern U.S.
Tropical depression Ivo, which had been a weak disorganized system until last Friday, intensified Saturday with sustained winds reaching 40-45 mph. Ivo's central pressure had risen Sunday to 1003 millibars, and the storm had weakened to back to tropical depression status. On Monday, Ivo had all but dissipated, but remnants continued to drift northward causing widespread showers across a five-state area of the southwestern U.S.
Heavy rains and flash flooding were observed Sunday across many southern California desert areas, most notably the Palm Desert area near Palm Springs, as well as the Indio - Coachella Valley areas.
Flash flood warnings in effect during the day Sunday had been downgraded back to watch status as of Sunday evening, due to decreased activity. However, strong storms developed again on Monday further to the west. Inland areas of Los Angeles county received significant rainfall Monday afternoon. Flash flood warnings were in effect late Monday for an area just northeast of Los Angeles in the San Gabriel mountains. Local flooding of streets and highways has been reported over the past 36 hours in southern California. By Monday evening, conditions had stabilized, but were expected to re-intensify again by Tuesday afternoon. Flood watches remain in effect through Tuesday for much of southern California, southern Nevada northwestern Arizona as well for portions of Utah and Colorado. Rainfall chances continue at 20 to 40% across much of southern California through Tuesday, and in L.A. county mountain areas into Wednesday.
Travelers and other interests in all above areas should continue to monitor these developments.