Flood Watch as heavy rain, thunderstorms to hit SoCal mountains this weekend

SAN DIEGO (FOX 5/KUSI) -- The National Weather Service (NWS) has issued a Flood Watch for San Diego County and Southern California mountains, along with beach hazard statements, that will be in effect this weekend as storms move through the region.

Thunderstorms are forecast to bring heavy rain to Southern California mountains from mid-morning on Saturday through Saturday night, with the potential to produce rainfall of 0.50 to 1 inch per hour, according to NWS.

Flood Watch

NWS has issued a Flood Watch from 11 a.m. to 7 p.m. Saturday for Southern California mountains including Riverside County mountains, San Bernardino County mountains and San Diego County mountains.

Authorities are warning rivers could rise, causing localized flooding, and that debris flows are possible in areas near burn scars. Mud, rocks and debris on mountain roads are also possible and drivers are urged to remain alert.

NWS advises residents who live in areas prone to flooding to prepare to take action if flooding develops. Just six inches of fast-moving water can knock over and carry away an adult, and one foot of water can carry away a vehicle.

Beach Hazards Statement

Toward the end of the weekend, San Diego County residents should check their local beach warning signs or flags before getting in the ocean as the National Weather Service is forecasting dangerous rip currents and elevated surf from Sunday morning through Tuesday evening thanks to Hurricane Narda as it heads north from Mexico.

NWS said to expect surf of 4 to 7 feet, with sets up to 8 feet possible, for south and southwest facing beaches in San Diego County and Orange County coastal areas.

Authorities are urging beachgoers to stay out of the water because of the hazardous swimming conditions forecast for Sunday through Tuesday, or to stay near active lifeguard towers. Rip currents can pull swimmers and surfers out to sea.

NWS says rock jetties are dangerous in high surf and beachgoers are advised to stay off the rocks as large waves can wash people off beaches and rocks.

Imperial County storms

The National Weather Service is also calling for a chance of thunderstorms across Imperial County this weekend.

The region can expect a 15% to 30% of rain, with the chance of localized downpours. The region is already saturated after several weeks of rainfall, so the Imperial County Government is warning residents flooding chances can be higher.

Sandbags are available for Imperial County residents at all Imperial County Fire Stations. Bring your own shovel and be prepared to fill and transport sandbags.

Residents are encouraged to clear drains, gutters, and yards of debris to help prevent blockages and to plan for possible travel delays or detours if flooding were to occur.

Full forecast fox5sandiego.com/weather