Hazard Report Provided By forecast.weather.gov

Flood Watch
National Weather Service Sacramento CA
1250 PM PST Sun Dec 21 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>069-230000-
/O.CON.KSTO.FA.A.0004.000000T0000Z-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, Blue Canyon, Alder
Springs, Modesto, Fairfield/Suisun, Stockton, Chester, Paradise,
Grass Valley, Burney, Quincy, Chico, Oroville, Shasta Dam,
Redding, Red Bluff, Jackson, and Sacramento
1250 PM PST Sun Dec 21 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

Flood Advisory
National Weather Service Sacramento CA
1032 PM PST Sun Dec 21 2025

CAC017-057-061-222000-
/O.EXT.KSTO.FA.Y.0015.000000T0000Z-251222T2000Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
El Dorado CA-Nevada CA-Placer CA-
1032 PM PST Sun Dec 21 2025

...FLOOD ADVISORY NOW IN EFFECT UNTIL NOON PST MONDAY...

* WHAT...Urban and small stream flooding caused by excessive
  rainfall continues.

* WHERE...Portions of central and northern California, including the
  following counties, in central California, Placer. In northern
  California, El Dorado and Nevada.

* WHEN...Until noon PST Monday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
  Dangerous flows over low-water crossings. Water over roadways.
  River or stream flows are elevated.

* ADDITIONAL DETAILS...
  - At 1027 PM PST, Doppler radar and gauges indicate continued
    moderate to heavy rain across the area. This is causing urban
    and small stream flooding. Overflowing poor drainage areas
    have already caused minor flooding in the advisory area.
    Between 2 and 6 inches of rain have fallen.
  - Some locations that will experience flooding
    include...Auburn, Blue Canyon, Baxter, Cisco, Soda Springs,
    Lake Of The Pines, Colfax, Sugar Pine, Emigrant Gap, Lake
    Spaulding, Iowa Hill, Chiquita Lake, Foresthill, Sugarbowl
    Ski Resort, Weimar, Kingvale, Meadow Lake, Georgetown, Soda
    Springs Ski Area and Donner Peak.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3926 12078 3943 12063 3943 12037 3937 12035
      3935 12033 3919 12025 3904 12021 3899 12045
      3895 12066 3888 12103 3908 12115


$$

DA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Sacramento CA
1255 PM PST Sun Dec 21 2025

CAZ068-069-230000-
/O.CON.KSTO.WS.A.0009.251224T0600Z-251226T1800Z/
Western Plumas County/Lassen Park-West Slope Northern Sierra
Nevada-
Including the cities of Blue Canyon, Chester, and Quincy
1255 PM PST Sun Dec 21 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 3 to 6 feet
  with locally higher amounts at 6500 feet and above. Winds could
  gust as high as 55 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/

JS

Hazard Report Provided By forecast.weather.gov