Major Flood
70 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: GRQC1). 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
63 ft
Minor Flood
59.9 ft
Action Stage
58 ft
What Floods at Each Level
70 ft
Major Flood Stage. Green Valley Creek water levels are backwatering the Martinelli Road Bridge and possibly spilling over the roadway. Major regional flooding on Green Valley Creek and other local creeks. Local residential access roads to creekside properties under water by several to many feet. Local bridge crossings impassable. Martinelli Road likely flooded and travel is difficult to impossible.
63 ft
Moderate Flood Stage. Local property access driveways and bridge crossings begin to flood and backwater, some by several feet. Access to, or egress from, local floodplain properties dangerous or impossible.
59.9 ft
Minor Flood Stage. Water begins to inundate floodplain along Green Valley Creek near the Martinelli Bridge and gaging site. Local property access may be compromised.
58 ft
Monitor Stage. Water level is 2 feet below first signs of local flooding near gaging site.
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
GRQC1
River
Green Valley Creek
County
Sonoma, CA
Coordinates
38.4786°N, 122.9083°W
Get Flood Alerts for Green Valley Creek
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 Green Valley Creek at Martinelli Road?
The Green Valley Creek at Martinelli Road 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 Green Valley Creek at Martinelli Road?
The NWS-defined flood stage for Green Valley Creek at Martinelli Road is 59.9 feet. Action stage begins at 58 feet. Moderate flooding starts at 63 feet, and major flooding at 70 feet.
How do I get alerts when Green Valley Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Green Valley Creek at Martinelli Road 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 Green Valley Creek at Martinelli Road gauge located?
The gauge is located in Sonoma County, California at coordinates 38.4786°N, 122.9083°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: Sonoma Water