LAGUNA DE SANTA ROSA - COTATI AT STONY POINT ROAD (CTIC1)
Latitude: 38.35º N
Longitude: 122.74º W
Elevation: 78 Feet
Location: Sonoma County in California
Bulletin Group: Russian Napa
River Group: Russian Napa
Issuance Time:
Dec 25 2025 at 1:11 PM PST
Next Issuance:
Dec 26 2025 at 9:00 AM PST
Action/Monitor: 82.0 Feet
Minor Flood: 84.0 Feet
Moderate Flood: 85.0 Feet
Major Flood: 89.0 Feet
Please Note: 1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
Major Flooding. Martin Avenue commercial district, as well as Labath Avenue and Commerce Blvd town center (Rohnert Park) susceptible to flooding (Copeland Creek immediately to the south is also probably flooding into the same area). Rancho Verde trailer park flooded. Backwater at Highway 101.
85.0 Feet
Moderate Flooding. Redwood Drive at Martin Avenue area in Rohnert Park, including Martin Avenue commercial area, may begin to flood. Rancho Verde trailer park likely beginning to flood. NWS will issue a Flash Flood Warning, if not yet already issued.
84.0 Feet
Minor Flooding. Rohnert Park Expressway begins to flood west of Rohnert Park. City turns on storm drain pumps to relieve back pressure, sending water back to the channel. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
82.0 Feet
Monitor Stage. City of Rohnert Park begins to monitor the gage and is alerted via USGS Water Watch notification. NWS will issue a Flash Flood Watch if not yet already issued.
Official 7 Day National Weather Service Forecast (CAZ506)
rest of Tonight: Breezy. Showers likely late in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Some thunderstorms may be severe with heavy rainfall. Lows in the 40s to lower 50s. Southwest winds 20 to 30 mph and Becoming south 10 to 20 mph after midnight. Gusts up to 45 mph.
Friday: Showers. A slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the 40s to upper 50s. South winds 10 to 20 mph.
Friday Night: Mostly cloudy in the evening then becoming partly cloudy. A chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the 30s to upper 40s. Southwest winds 5 to 10 mph and Becoming northwest after midnight.
Saturday: Partly cloudy in the morning then becoming sunny. A slight chance of showers in the morning. Highs in the upper 40s to mid 50s. North winds 5 to 10 mph. Chance of showers 20 percent.
Saturday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog and frost after midnight. Lows in the mid 30s to lower 40s. North winds 5 to 10 mph.
Sunday: Partly cloudy. Highs in the 40s to mid 50s.
Sunday Night: Clear except for frost. Lows in the 30s to lower 40s.
Monday: Sunny. Areas of frost. Highs in the upper 40s to lower 60s.
Monday Night and Tuesday: Mostly clear. Lows in the mid 30s to lower 40s. Highs in the upper 40s to lower 60s.
Tuesday Night: Mostly clear except patchy fog. Lows in the mid 30s to lower 40s.
Wednesday: Partly cloudy in the morning then becoming sunny. Highs in the upper 40s to lower 60s.
Wednesday Night: Partly cloudy. Patchy fog. A slight chance of showers. Lows in the upper 30s to mid 40s.
New Years Day: Mostly cloudy. Patchy fog. A chance of showers. Highs in the 40s to mid 50s.
Product Disclaimer
This river graphic is not intended to serve as a
substitute for official flood watches, warnings, advisories, or statements
issued by the NWS San Francisco Bay Area-Monterey Weather Forecast Office. Observations
are preliminary and subject to change. River levels identified as "forecast"
should be consistent with those contained in official NWS products.
River levels identified as "guidance" have significant uncertainty
due to future weather or reservoir regulation and are provided for planning
purposes only.
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