Hazard Report Provided By forecast.weather.gov

Flood Watch
National Weather Service Sacramento CA
103 PM PST Sat Dec 20 2025

.A series of warm atmospheric rivers will bring moderate to heavy
rain to the Valley, foothills, and mountains the week of Christmas.
The prolonged period of rain will bring the risk of flooding to the
Sacramento Valley, northern San Joaquin Valley, northern Sierra
Nevada and adjacent foothills, as well as the Coastal Range.

CAZ013>019-063-066>069-220000-
/O.CON.KSTO.FA.A.0004.251221T0000Z-251227T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Shasta Lake Area / Northern Shasta County-Burney Basin / Eastern
Shasta County-Northern Sacramento Valley-Central Sacramento
Valley-Southern Sacramento Valley-Carquinez Strait and Delta-
Northern San Joaquin Valley-Mountains Southwestern Shasta County
to Western Colusa County-Northeast Foothills/Sacramento Valley-
Motherlode-Western Plumas County/Lassen Park-West Slope Northern
Sierra Nevada-
Including the cities of Marysville/Yuba City, Burney, Paradise,
Chico, Sacramento, Alder Springs, Modesto, Blue Canyon, Jackson,
Stockton, Fairfield/Suisun, Grass Valley, Red Bluff, Shasta Dam,
Redding, Quincy, Oroville, and Chester
103 PM PST Sat Dec 20 2025

...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON...

* WHAT...Flooding caused by excessive rainfall continues to be
  possible.

* WHERE...A portion of northern California, including the following
  areas, the Sacramento Valley, northern San Joaquin Valley, Delta
  region, Sierra Nevada and adjacent foothills, and Coastal Range.

* WHEN...Through Friday afternoon.

* IMPACTS...Excessive runoff will result in rises along area rivers,
  creeks, streams. Small streams and creeks may rise out of their
  banks. Flooding may occur in low-lying, poor drainage, and urban
  areas. Mudslides and rockslides may occur in mountain and foothill
  areas.

* ADDITIONAL DETAILS...
  - Periods of moderate to heavy rain are forecast the week of
    Christmas. Debris flows are not expected over recent burn
    scars, but do anticipate enhanced runoff in/below scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

JS

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sacramento CA
413 PM PST Sat Dec 20 2025

CAZ068-069-220000-
/O.CON.KSTO.WS.A.0009.251224T0600Z-251226T1800Z/
Western Plumas County/Lassen Park-West Slope Northern Sierra
Nevada-
Including the cities of Quincy, Blue Canyon, and Chester
413 PM PST Sat Dec 20 2025

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY EVENING THROUGH
FRIDAY MORNING...

* WHAT...Heavy snow possible. Accumulation amounts uncertain at this
  time but may range from around a foot at 5500 feet and up 4 feet
  at highest elevations. Winds could gust as high as 45 mph.

* WHERE...West Slope Northern Sierra Nevada and Western Plumas
  County/Lassen Park including Interstate 80 and Highway 50.

* WHEN...From Tuesday evening through Friday morning.

* IMPACTS...Dangerous travel conditions with chain controls and road
  closures possible. Low visibility due to combination of wind and
  heavy snow.

* ADDITIONAL DETAILS...Snow accumulations will remain near or above
  pass level through Tuesday, then drop to around 5500 feet during
  the day Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Check the latest road conditions from Caltrans online at
quickmap.dot.ca.gov or dial 5 1 1.

&&

$$

For more information, visit us at www.weather.gov/sto/

KH

Hazard Report Provided By forecast.weather.gov