CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MERCED RIVER - YOSEMITE NP AT POHONO BRIDGE (POHC1)

Latitude: 37.72º N	Longitude: 119.67º W	Elevation: 3862 Feet
Location: Mariposa County in California		Bulletin Group: San Joaquin		River Group: San Joaquin

Issuance Time:

Dec 27 2025 at 9:54 AM PST

Next Issuance:

Dec 28 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: 10.0 Feet

Moderate Flood: 12.5 Feet

Major Flood: 20.0 Feet

Plot Type:

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
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	3,430	7.28	May 11, 2025
2024	5,090	8.79	May 16, 2024
2023	9,520	12.08	May 22, 2023
2022	4,810	8.55	Oct 25 2021
2021	2,160	5.92	May 6, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1916 to Present) - Ranked by Flow
1997	24,600	23.43	Jan 03, 1997
1956	23,400	21.52	Dec 23, 1955
1951	23,000	19.98	Nov 19, 1950
1938	22,000	19.10	Dec 11, 1937
1965	18,000	16.96	Dec 23, 1964
1963	13,200	14.25	Feb 01, 1963

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
23.45 Feet	Flood of record...1/3/97. $178 million damage to Yosemite Valley.
13.6 Feet	Lift stations at Housekeeping Camp and Yosemite Creek flooded. Southside Drive at Chapel Meadow impassable.
12.5 Feet	Northside Drive at Wosky Pond, El Capitan crossover, and Sentinel crossover are impassable to vehicles.
12.0 Feet	Water on road at Northside Drive, Southside Drive, El Capitan crossover, Sentinel crossover, and Highway 140 near Cookie Cliff.
11.4 Feet	Water begins to overtop road curbs on Northside Drive. Swinging Bridge overtops.
10.0 Feet	Merced River at Pohono Bridge begins to rise out of its banks. Flood Stage.
9.5 Feet	Lower Pines and Housekeeping Camp begin flooding.
7.0 Feet	RIVER IS CLOSED TO RAFTERS AND FLOATATION DEVICES.

Official 7 Day National Weather Service Forecast (CAZ324)

Tonight: Mostly clear. Near steady temperature in the lower 30s. East winds up to 10 mph.

Sunday: Not as cool. Sunny. Highs 44 to 52. East winds up to 10 mph shifting to the west in the afternoon.

Sunday Night: Mostly clear. Lows 28 to 38. Northeast winds 5 to 15 mph.

Monday: Not as cool. Sunny. Highs 51 to 59. Northeast winds 5 to 10 mph.

Monday Night: Clear. Lows 34 to 42. East winds 5 to 15 mph.

Tuesday: Sunny. Highs 53 to 61.

Tuesday Night: Mostly clear. Lows 37 to 47.

Wednesday: Partly sunny. A 40 percent chance of rain in the afternoon. Highs 55 to 63.

Wednesday Night: Mostly cloudy with a 50 percent chance of rain. Lows 38 to 48.

New Years Day and Thursday Night: Rain likely. Highs 49 to 57. Lows 35 to 45. Chance of rain 70 percent.

Friday: Rain and snow likely in the morning, then rain likely in the afternoon. Highs 45 to 53. Chance of precipitation 60 percent.

Friday Night: Mostly cloudy with a 50 percent chance of rain and snow. Lows 32 to 40.

Saturday: Partly sunny. Chance of rain and snow in the morning, then chance of rain in the afternoon. Highs 45 to 53. Chance of precipitation 30 percent.

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.

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Verification - Historical Graphical RVF
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