Los Angeles is bracing for a period of significant rainfall as a major weather system moves into the region. The National Weather Service forecasts heavy rain, with some areas potentially receiving up to 2 inches of precipitation. The rain is expected to begin late Sunday night and continue through Monday, with the heaviest downpours occurring during the morning hours. This weather event is part of a larger pattern affecting the southwestern United States, driven by a low-pressure system drawing moisture from the Pacific Ocean.