CNRFC - Hydrology - River Guidance - Graphical RVF

MERCED RIVER - YOSEMITE NP AT POHONO BRIDGE (POHC1)

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

Issuance Time:

Mar 22 2023 at 2:20 PM PDT

Next Issuance:

Mar 23 2023 at 9:00 AM PDT

Monitor Stage: N/A

Flood Stage: 10.0 Feet

Plot Type:

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

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021	2,160	5.92	May 6, 2021
2020	3,560	7.41	Apr 30, 2020
2019	6,770	10.13	Jun 6, 2019
2018	12,100	13.68	Apr 7, 2018
2017	10,500	12.69	Jan 9, 2017
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

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ324)

Tonight: Mostly cloudy. Lows 26 to 32. West winds up to 10 mph.

Thursday: Mostly cloudy with a 50 percent chance of snow and rain. Highs 35 to 43. Southwest winds up to 10 mph.

Thursday Night: Mostly cloudy. A 40 percent chance of snow and rain in the evening. Lows 20 to 26. West winds 5 to 10 mph shifting to the northeast after midnight.

Friday: Mostly sunny. Highs 37 to 43. Northeast winds around 5 mph shifting to the west in the afternoon.

Friday Night: Mostly cloudy. Lows 20 to 26. Northwest winds 5 to 10 mph shifting to the northeast after midnight.

Saturday through Sunday: Partly cloudy. Highs 35 to 43. Lows 16 to 22.

Sunday Night: Mostly cloudy. Lows 21 to 27.

Monday: Partly sunny. Chance of rain and snow in the afternoon. Highs 38 to 46. Chance of precipitation 50 percent.

Monday Night: Chance of snow and rain in the evening, then snow and rain likely after midnight. Light snow accumulations. Lows 28 to 34. Chance of precipitation 60 percent.

Tuesday: Snow likely in the morning, then rain and snow in the afternoon. Snow may be heavy at times. Heavy snow accumulations. Highs 37 to 45. Chance of precipitation 80 percent.

Tuesday Night: Snow and rain likely in the evening, then snow likely after midnight. Moderate snow accumulations. Lows 25 to 31. Chance of precipitation 70 percent.

Wednesday: Chance of snow in the morning, then snow likely in the afternoon. Light snow accumulations. Highs 34 to 42. Chance of snow 70 percent.

Impacts - E19 Information
7.0 Feet	River is closed to rafters and floatation.
9.0 Feet	Chapel Meadow (south side of river) and Cooks Meadow (north side of river) begins to experience overflow.
9.5 Feet	Portion of Lower Pines Campground becomes flooded. Limited site-specific evacuations begin at Housekeeping Camp located along the south-facing bank of the Merced River. (Upstream from Sentinel Bridge and downstream from Stoneman Bridge)
10.0 Feet	Western portion of North Pines Campground, located at the east end of Yosemite Valley between the confluence of the Merced River and Tenaya Creek, begins to flood. Water rises to the base of the "swinging bridge".
12.5 Feet	Northside Drive and Southside Drive, which are the major roads in Yosemite Valley, become flooded and are closed to traffic.
23.45 Feet	Flood of record (01/02/1997). $178 Million damage to Yosemite Valley.

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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