Petaluma River at Corona Road

Highest listed crest 27.98 ftFlood stage 24.9 ft3 crests since 1997

The Petaluma River at Corona Road crested above flood stage 3 times among the 3 crests the National Weather Service lists from 1997 to 1998. The highest, 27.98 ft on February 3, 1998, was moderate flooding, 3.08 feet above flood stage.

The gauge

Highest listed crest: 27.98 ft; February 3, 1998
Flood stage: 24.9 ft; Major flooding from 31.7 ft
Crests at major: 0; 3 above flood stage
Most recent flood crest: February 7, 1998; 25.49 ft, minor flooding
Location: Sonoma County; Near Petaluma (2.2 mi), Rohnert Park (6.3 mi), Sonoma (11.1 mi)
Identifiers: NWS PCRC1; No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Petaluma River at Corona Road

Action stage	24.9	0	—	The level at which the NWS or its partners begin to take action
Flood stage (minor)	24.9	2	Feb 7, 1998	Minimal or no property damage, but possibly some public threat
Moderate flood stage	27.0	1	Feb 3, 1998	Some inundation of structures and roads near the stream
Major flood stage	31.7	0	—	Extensive inundation of structures and roads

Every listed crest

3 crests from 1997 to 1998. Filled: at or above flood stage. Hover a crest for its date and stage.

These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Petaluma River at Corona Road

1	Feb 3, 1998	27.98	+3.08	Moderate	—
2	Feb 7, 1998	25.49	+0.59	Minor	—
3	Jan 25, 1997	25.20	+0.30	Minor	—

Other gauges in Sonoma County

Flood gauges in Sonoma County

Guerneville	32.0	49.50 ft, Feb 18, 1986	15
Healdsburg	23.0	30.80 ft, Dec 1, 1937	2

Sonoma County: every hazard · River floods across the country · California

NOAA National Water Prediction Service, gauge PCRC1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.