* WHAT...Significant and widespread flooding caused by excessive
rainfall will be likely, with potential debris flow impacts across
recent burn scars.

* WHERE...The following counties...
Los Angeles.
Ventura.
Santa Barbara.
San Luis Obispo.

* WHEN...Through Friday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Mud and debris flows will be possible across foothill and mountain
areas, including recent burn scars.

* ADDITIONAL DETAILS...
- This prolonged strong Atmospheric River storm system  will
bring periods of heavy rain through late this week. Potential
flooding impacts include the threat of significant and
widespread urban roadway flooding, a high risk of major rock
and mud slides, 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.
- http://www.weather.gov/safety/flood
                                            

* WHAT...Large breaking waves of 10 to 16 feet with dangerous
rip currents.

* WHERE...San Luis Obispo County Beaches and Santa Barbara
County Central Coast Beaches.

* WHEN...Until 11 AM PST Saturday.

* IMPACTS...There is an increased risk for ocean drowning. Rip
currents can pull swimmers and surfers out to sea. Large
breaking waves can cause injury, wash people off beaches and
rocks, and capsize small boats near shore.

* ADDITIONAL DETAILS...Minor to potentially isolated moderate
coastal flooding for south-facing beaches especially during
high tides. This is expected to occur through Thursday due to
strong southerly winds.
                                            

* 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.