National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service



COSUMNES RIVER - MCCONNELL (MCNC1)
Latitude: 38.36º NLongitude: 121.34º WElevation: 5 Feet
Location: Sacramento County in CaliforniaBulletin Group: San JoaquinRiver Group: North San Joaquin
Issuance Time: May 09, 2025 at 8:42 AM PDT
Action/Monitor: 38.5 FeetMinor Flood: 44.5 FeetModerate Flood: 53.4 FeetMajor Flood: 53.5 Feet
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
Short-Range Peak Exceedance Plot   Product Info.   CSV Ensemble Files (Data in kcfs): Forecast Group | MCNC1
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Location Photographs

ESRI™ Locator Map
Flood Impacts
46.5 FeetAt approximately 44,000 cfs, water exits the river upstream and downstream of Highway 99. Dillard Road is flooded from Highway 99 to Riley Road. Twin Cities Road is flooded from Hardesty Lane to Christensen Road.
44.5 FeetFlood stage.
41.5 FeetThe Cosumnes River overflow channel begins to flow.
38.5 FeetMonitor Stage.
Official 7 Day National Weather Service Forecast   (CAZ017)
Today: Sunny. Highs 88 to 95. Light winds.

Tonight: Mostly clear. Lows 53 to 63. Southwest winds up to 10 mph.

Saturday: Sunny. Highs 88 to 95. Southwest winds up to 10 mph.

Saturday Night: Clear. Lows 53 to 59. Southwest winds 10 to 15 mph.

Sunday: Mostly sunny. Highs 73 to 82. Southwest winds 10 to 15 mph. Gusts up to 20 mph increasing to 30 mph in the afternoon.

Sunday Night: Mostly clear. Lows around 50.

Monday: Mostly cloudy with a chance of rain showers. Highs 61 to 69.

Monday Night: Partly cloudy with a slight chance of rain showers. Lows around 48.

Tuesday: Partly cloudy. Highs 65 to 72.

Tuesday Night through Wednesday Night: Clear. Lows around 50. Highs 68 to 78.

Thursday: Mostly sunny. Highs 78 to 85.