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Elev 2962 ft, 39.2 °N, 121.02 °W

Grass Valley, CA Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Grass Valley, CA
Elevation: 2962ft
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Active Weather Alerts

Flood Advisory
Issued: 1:54 PM Dec. 21, 2025 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 545 PM PST THIS AFTERNOON...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of northern California, including the following
counties, Butte, Nevada, Plumas, Sierra, Tehama and Yuba.

* WHEN...Until 545 PM PST Sunday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Ponding of water
in urban or other areas is occurring or is imminent.

* ADDITIONAL DETAILS...
- At 550 AM PST, local law enforcement reported mud and rock
slides within the advisory area. Moderate to heavy rain is
continuing to fall over the area and as a result minor
flooding is ongoing or expected to begin shortly. Between 1
and 3.5 inches of rain have fallen.
- Additional rainfall amounts of 3 to 6 inches are expected
over the area. This additional rain will result in minor
flooding, potential mud and rock slides, and rises on small
streams.
- Some locations that will experience flooding include...
Chico, Paradise, Oroville, Grass Valley, Brush Creek Rs,
Pulga, Palermo, Downieville, Lake Wildwood, Feather Falls,
Forbestown, Brownsville, Challenge-Brownsville, Challenge,
Hurleton, American House, Frenchtown, Dobbins, Oroville Dam
and Oroville East.
- 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 aware of your surroundings and do not drive on flooded roads.

&&



Flood Watch
Issued: 9:03 PM Dec. 20, 2025 – National Weather Service
...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.

&&

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