Matanzas C a Santa Rosa CA

Sonoma County, California · USGS gauge 11466170 · NWS MZSC1 · California river levels

Is Matanzas C a Santa Rosa CA flooding right now?

Matanzas C a Santa Rosa CA measured 155.23 ft on 2026-10-27 19:00:00 UTC. That observation was 18.1 ft below its 173.3 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height

155.23 ft

as of 48 min ago

Streamflow

0 cfs

data refreshed 1 min ago

Minor flooding here begins at 173.3 ft, with major flooding at 176 ft.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

Category	Stage	Current distance
Action	171 ft	15.8 ft below
Minor flood	173.3 ft	18.1 ft below
Moderate flood	174.5 ft	19.3 ft below
Major flood	176 ft	20.8 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Last 7 days

Past 7 days · 155.16–155.51 ft

Nearby gauges

Gauge	Distance	County
Santa Rosa C a Santa Rosa CA	1.2 mi	Sonoma County
Brush C a Santa Rosa CA	1.6 mi	Sonoma County
Colgan C near Santa Rosa CA	3.0 mi	Sonoma County
Santa Rosa C a Willowside Rd near Santa Rosa CA	5.7 mi	Sonoma County
Colgan C near Sebastopol CA	5.7 mi	Sonoma County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast