...MODERATE TO HEAVY PRECIPITATION THROUGHOUT THE DAY TODAY AS THE
LOW AND ATMOSPHERIC RIVER SHIFT INLAND AND WEAKEN OVER CALIFORNIA...
...RETURN TO DRY CONDITIONS BY SUNDAY UNDER A BUILDING RIDGE WITH
POTENTIAL FOR PRECIPITATION ON WEDNESDAY...

.METEOROLOGICAL CONDITIONS (FRI AM - THU AM)...

Precipitation continues across the forecast area as the low begins
moving onshore over the North Coast and the atmospheric river pushes
eastward over southern California and into the southern Sierra.
Radar imagery currently shows moderate to heavy banded precipitation
over northern Mendocino and Humboldt counties with another heavier
band just offshore associated with the pinwheeling low. Further
south and with the weakening AR/front, heavy precipitation is moving
through Los Angeles county with shower activity across the state.

The system as a whole is forecast to push inland and
weaken/dissipate throughout the day today and into tomorrow morning
resulting in one more round of precipitation across the forecast
area. The heaviest 24-hour accumulations of over 2 inches will
target the Shasta drainage where the low tracks inland and the
eastern Transverse Range where enhanced upslope associate with the
front propagates eastward. An additional 1 to 1.5 inches are
forecast along the Sierra with heavier localized accumulations
likely where convective activity moves inland. 1-2 inches are also
forecast along the North Coast with the potential for heavier
accumulations where heavy banding moves onshore.

Light shower activity will likely remain through Saturday as the
system fully dissipates resulting in minimal accumulations before
the region returns to a dry pattern on Sunday. This ridge is
forecast to persist through mid-week.

Guidance is in relatively good agreement that an upper low will
develop off the Baja Peninsula, well to the southwest of the
forecast area, early in the week and slowly track northward towards
Southern California. Precipitation chances over southern California
increase on Wednesday as the low approaches the coast, extending
higher PWATs inland. Uncertainty in total accumulations are high,
but morning forecasts mostly followed the NBM and WPC spreading <1
inch of 24-hour accumulations across the SoCal Bight through 12Z
Thursday.

Freezing levels will remain around 5k feet across much of the north,
~6k feet across the southern Sierra, and ~8k feet across SoCal
throughout the remainder of precipitation today before rising
substantially to >10k feet under the building ridge.

Please Note: This product may NOT be routinely updated.
Please refer to the following product issued by the CNRFC
www.cnrfc.noaa.gov/Daily-Briefing for a graphical summary of
weather and hydrologic conditions.