In Northern California, officials monitoring the stricken Oroville Dam said they were confident the reservoir would handle runoff from the storms because releases have been lowering the lake's level since its spillways were damaged last week, prompting mass evacuations. With soil already saturated from significant rains this winter, forecasters warned of potential for flash floods and debris flows, especially near areas left barren by wildfires. Santa Anita Park near Pasadena canceled all its horse races for Friday, and golfers at the PGA tour's annual stop at Riviera Country Club were unlikely to get more than a few holes in amid the storm. Pasadena cancelled Saturday's annual Black History Month parade, citing public safety concerns including possible lightning strikes. The Sacramento weather office said models were trending stronger for a system arriving Sunday night and Monday in the northern part of the state due to a tap of deep moisture over the Eastern Pacific that could bring 24 to 30 hours of moderate to heavy precipitation.