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RUSSIAN RIVER - HEALDSBURG (HEAC1)

Latitude: 38.61º N	Longitude: 122.84º W	Elevation: 77 Feet
Location: Sonoma County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Dec 08, 2025 at 7:54 AM PST

Action/Monitor: 20.0 Feet

Minor Flood: 23.0 Feet

Moderate Flood: 27.0 Feet

Major Flood: 29.0 Feet

Please Note:

Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.

Threshold Exceedance Plot Product Information

CSV Ensemble Files (Data in kcfs): Forecast Group | HEAC1

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		Official Forecast (Deterministic)

		Prob. of Threshold Exceedance
		Model Traces

What information is considered in this forecast?

Verification / Historical Plots
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Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
30.0 Feet	Major to disastrous flooding along the reach of the gage occurs. Major flooding occurs in the agricultural sections of Alexander Valley.
29.0 Feet	Major flooding along the reach of the gage will occur. Homes, businesses and secondary roads in the lower sections of Healdsburg will begin to flood. The lower areas of Alexander Valley will begin to flood.
27.0 Feet	Moderate flooding along the reach of the gage will occur. Some secondary roads south of US 101 will have minor to moderate flooding.
25.0 Feet	Low lying areas south of US 101 begin to have minor flooding.
23.0 Feet	Minor flooding of farm land and banks in rural areas along the reach of the gage will occur.

Official 7 Day National Weather Service Forecast (CAZ506)

Today: Mostly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the lower 50s to mid 60s. East winds up to 5 mph and becoming south in the afternoon.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Areas of fog. Lows in the 30s to upper 40s. North winds up to 5 mph.

Tuesday: Partly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the 50s to 60s. North winds up to 5 mph and becoming southwest in the afternoon.

Tuesday Night: Mostly clear in the evening then becoming partly cloudy. Areas of fog. Lows in the 40s to lower 50s. North winds up to 5 mph.

Wednesday: Partly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the upper 50s to lower 70s. Northeast winds around 5 mph and becoming northwest up to 5 mph in the afternoon.

Wednesday Night: Mostly clear in the evening then becoming partly cloudy. Areas of fog. Lows in the 40s to lower 50s.

Thursday and Thursday Night: Mostly clear. Areas of fog. Highs in the upper 50s to lower 70s. Lows in the 40s to lower 50s.

Friday: Partly cloudy in the morning then becoming sunny. Patchy fog. Highs in the upper 50s to lower 70s.

Friday Night and Saturday: Mostly clear. Areas of fog. Lows in the upper 30s to lower 50s. Highs in the mid 50s to upper 60s.

Saturday Night: Partly cloudy in the evening then becoming mostly cloudy. Areas of fog. Lows in the 40s to lower 50s.

Sunday: Mostly cloudy in the morning then becoming partly cloudy. Areas of fog. Highs in the 50s to mid 60s.

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