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

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CHOWCHILLA BYPASS - RIPPERDAN (CHBC1)
Latitude: 36.77º NLongitude: 120.29º WElevation: 170 Feet
Location: Madera County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: May 08 2025 at 8:12 AM PDTNext Issuance: May 09 2025 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

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.
Observed Data Credit
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Raw streamflow data is provided by the San Luis and Delta-Mendota Water Authority.
View San Luis and Delta-Mendota Water Authority Data for this station location.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ302)
Tonight: Clear. Lows in the upper 50s. Northwest winds up to 10 mph.

Friday: Sunny. Highs in the mid 90s. Northwest winds up to 10 mph.

Friday Night: Mostly clear. Lows in the lower 60s. Northwest winds 5 to 10 mph.

Saturday: Sunny. Highs in the upper 90s. Northwest winds up to 10 mph.

Saturday Night: Mostly clear. Lows in the upper 50s. Northwest winds 5 to 10 mph.

Sunday: Not as warm. Mostly sunny. Highs in the upper 80s.

Sunday Night and Monday: Not as warm. Mostly clear. Lows around 50. Highs in the mid 70s.

Monday Night: Partly cloudy. Lows in the upper 40s.

Tuesday and Tuesday Night: Mostly clear. Highs in the mid 70s. Lows in the upper 40s.

Wednesday: Sunny. Highs in the lower 80s.

Wednesday Night and Thursday: Mostly clear. Lows in the lower 50s. Highs in the lower 80s.
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 Joaquin Valley-Hanford 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.