Major Flood
44.3 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: PTMC1). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
43 ft
Minor Flood
40.7 ft
Action Stage
40.7 ft
What Floods at Each Level
44.3 ft
Major Flood Stage. Water level has reached by bottom of the bridge soffit.
43.9 ft
Flood waters flowing down Redwood Way at Old Redwood Highway.
43.2 ft
Water levels are above bankfull and begin flowing through upstream businesses, including passing through the old lumber company's parking lot.
43 ft
Moderate Flood Stage. A local detention basin may begin to release water onto North McDowell Blvd. Ext.
42.3 ft
Water begins to flow across Ely Road at the railroad track near Old Redwood Highway. Holm Road begins to flood and water ponds on North McDowell at the Post Office.
41.7 ft
City of Petaluma will notify the City Manager and evaluate the need to activate the Emergency Operations Center.
40.7 ft
Action Stage. NWS and City of Petaluma will be closely monitoring the situation. NWS will issue an urban/small stream advisory if not already issued.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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About This Gauge
NWS LID
PTMC1
River
Willow Brook
County
Sonoma, CA
Coordinates
38.2797°N, 122.6694°W
Get Flood Alerts for Willow Brook
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Willow Brook at Old Redwood Highway Bridge?
The Willow Brook at Old Redwood Highway Bridge gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Willow Brook at Old Redwood Highway Bridge?
The NWS-defined flood stage for Willow Brook at Old Redwood Highway Bridge is 40.7 feet. Action stage begins at 40.7 feet. Moderate flooding starts at 43 feet, and major flooding at 44.3 feet.
How do I get alerts when Willow Brook rises?
Download StormCast free on Google Play, go to River Gauges, and add Willow Brook at Old Redwood Highway Bridge to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Willow Brook at Old Redwood Highway Bridge gauge located?
The gauge is located in Sonoma County, California at coordinates 38.2797°N, 122.6694°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: City of Petaluma