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 10, 2025 at 8:19 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, haze. Lows 61 to 71. Southwest winds up to 10 mph shifting to the south 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. Southwest winds up to 10 mph with gusts to around 20 mph.

Saturday: Sunny. Highs 93 to 103. Southwest winds up to 10 mph.

Saturday Night: Clear. Lows 58 to 68. South winds up to 15 mph with gusts to around 25 mph.

Sunday: Sunny. Highs 94 to 102.

Sunday Night: Clear. Lows 57 to 67.

Monday and Monday Night: Clear. Highs 95 to 103. Lows 56 to 66.

Tuesday through Thursday: Clear. Highs 87 to 97. Lows 55 to 65.