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: Jul 09, 2025 at 7:47 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)
Tonight: Clear. Lows 57 to 67. Southwest winds up to 10 mph.

Thursday: Sunny. Areas of smoke in the afternoon. Warmer. Highs 98 to 104. Northwest winds up to 10 mph.

Thursday Night: Clear. Areas of smoke. Lows 62 to 72. West winds around 10 mph shifting to the south up to 10 mph after midnight. Gusts up to 20 mph.

Friday: Sunny. Highs 99 to 105. Southwest winds up to 10 mph.

Friday Night: Clear. Lows 60 to 70. South winds up to 10 mph with gusts to around 20 mph.

Saturday: Sunny. Highs 93 to 103.

Saturday Night: Clear. Lows 57 to 67.

Sunday through Wednesday: Clear. Highs 90 to 100. Lows 56 to 66.