Willow Brook at Stony Point Road

1. 40.40 ftMajor Flood Stage. Water reaches bridge deck height.
2. 39.30 ftWater reaches bottom of bridge and soffit.
3. 39.10 ftStony Point Road at Petaluma Blvd. flooded.
4. 39.00 ftModerate Flood Stage. Water is above bankfull over north side of levy (pumpkin patch).
5. 38.90 ftWater starts flowing across Stony Point Road south of Leisure Lake and begins flowing towards Highway 101 around/into the intersection of Petaluma Boulevard North and Stony Point Road. Water begins flowing across Rainsville Road but passable as an emergency exit for Leisure Lake (City of Petaluma Policies and Procedures).
6. 38.70 ftStony Point Road south of Leisure Lake flooded and should be closed.
7. 37.40 ftMinor Flood Stage. NWS issues a Flash Flood Warning if not already issued. Waters reach edge of Stony Point Road south-bound lane.
8. 34.70 ftCity of Petaluma Manager notified. City of Petaluma evaluates need to open Emergency Operations Center.
9. 33.70 ftAction Stage. NWS and City of Petaluma monitoring gage readings closely. City of Petaluma Fire Chief, Watch Commander, and Water Resources and Conservation Director notified.

Most recent crests

• February 19, 1998: 37.03 ft
• February 7, 1998: 35.83 ft
• February 3, 1998: 37.13 ft

• Wiggins Creek at Rainsville Road
• Petaluma River at Twin Bridges
• Willow Brook at Old Redwood Highway Bridge
• Petaluma River at Corona Road
• Corona Creek at Sonoma Mountain Pkwy.
• Willow Brook at Penngrove Park
• Capri Creek at Casella Way (Leghorn Stream)
• Lynch Creek (Petaluma) at McDowell Blvd.

Forecasts by the California Nevada River Forecast Center. Graphical forecasts are not available during times of high water, forecast crest information can be found in the local WFO web page.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.