Active AlertsSolvang, CA

What: South to southeast winds 30 to 50 mph with damaging gusts up to 70 mph likely, except up to 80 mph in the mountains and foothills.
Where: All of San Luis Obispo and Santa Barbara counties, the mountains and foothills of Los Angeles and Ventura counties, and the Antelope Valley.
When: Until 3 PM PST Thursday.
Impacts: Damaging winds are likely with this powerful Atmospheric River storm, with widespread downed trees and powerlines likely, as well as the potential for power outages and property damage. Travel will be difficult, especially for high profile vehicles. Mountain roadways and passes will be especially dangerous, including the busy Interstate 5 near the Grapevine. The combination of strong winds and moist soils will increase the risk for downed trees.

Watch for falling debris and tree limbs. Use caution if you must drive. Secure loose outdoor objects that could be blown around or damaged by the wind.

What: Significant and widespread flooding caused by excessive rainfall will be likely, with potential debris flow impacts across recent burn scars.
Where: A portion of southwest California, including the following areas, Antelope Valley, Calabasas and Agoura Hills, Catalina and Santa Barbara Islands, Central Ventura County Valleys, Cuyama Valley, Eastern Antelope Valley Foothills, Eastern San Fernando Valley, Eastern San Gabriel Mountains, Eastern Santa Monica Mountains Recreational Area, Interstate 5 Corridor, Lake Casitas, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Los Angeles County San Gabriel Valley, Northern Ventura County Mountains, Ojai Valley, Palos Verdes Hills, San Luis Obispo County Beaches, San Luis Obispo County Inland Central Coast, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Barbara County Central Coast Beaches, Santa Barbara County Inland Central Coast, Santa Barbara County Interior Mountains, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Santa Clarita Valley, Santa Lucia Mountains, Santa Susana Mountains, Santa Ynez Mountains Eastern Range, Santa Ynez Mountains Western Range, Santa Ynez Valley, Southeastern Ventura County Valleys, Southern Salinas Valley, Southern Ventura County Mountains, Ventura County Beaches, Ventura County Inland Coast, Western Antelope Valley Foothills, Western San Fernando Valley, Western San Gabriel Mountains and Highway 14 Corridor and Western Santa Monica Mountains Recreational Area.
When: Through Friday afternoon.
Impacts: This prolonged strong Atmospheric River storm system will bring periods of heavy rain from late Tuesday into Thursday evening. Potential flooding impacts include the threat of significant and widespread urban roadway flooding, a high risk of major rock/mudslides, and rapid rises in creeks, streams, and rivers which will likely lead to swift water rescues. The recent burn scars will be at risk for debris flows, possibly damaging. These flooding impacts will likely lead to significant travel delays and road closures during this busy holiday travel period.
Additional Details: - Heavy rainfall with possible thunderstorms is expected with high rainfall rates, potentially exceeding one inch per hour during the peak of the event Tuesday night into Wednesday across favored south facing slopes and near thunderstorms. Another round of heavier rain and thunderstorms will be possible on Thursday. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

At 444 AM PST, Doppler radar was tracking a strong thunderstorm capable of producing a waterspout that if develops would move over land near Highway 101 through Gaviota State Park, or 8 miles east of Point Conception, moving northeast at 35 mph.
Hazard: Waterspouts and wind gusts of 50 to 55 mph.
Source: Radar indicated.
Impact: Waterspouts can easily overturn boats and create locally hazardous waters. Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include Highway 101 through Gaviota State Park.

If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways.

What: Flooding caused by excessive rainfall is expected.
Where: A portion of southwest California, including the following counties, San Luis Obispo and Santa Barbara.
When: Until noon PST Wednesday.
Impacts: Minor flooding in low-lying and poor drainage areas. Water over roadways.
Additional Details: - At 427 AM PST, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Up to 1.5 inches of rain have fallen. - Some locations that will experience flooding include Santa Maria, San Luis Obispo, Lompoc, Paso Robles, Morro Bay, Pismo Beach, Atascadero, Arroyo Grande, Nipomo, Vandenberg Space Force Base, Orcutt, Cuyama, Grover Beach, Guadalupe, Sisquoc, Black Mountain, Lake Lopez, Highway 166 between Twitchell Dam and the Cuyama Valley, Oceano and Santa Margarita. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.