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:

May 31 2023 at 8:46 AM PDT

Next Issuance:

Jun 01 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
2022	4,810	8.55	Oct 25 2021
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
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

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.

Official 7 Day National Weather Service Forecast (CAZ324)

Tonight: Mostly clear. Slight chance of thunderstorms early in the evening, then slight chance of rain late in the evening. Lows 46 to 52. West winds up to 5 mph shifting to the east after midnight. Chance of precipitation 20 percent.

Thursday: Sunny with a 20 percent chance of thunderstorms. Highs 65 to 75. Southwest winds up to 10 mph.

Thursday Night: Mostly clear. Lows 43 to 51. West winds up to 10 mph shifting to the northeast after midnight.

Friday: Sunny. Highs 67 to 77. East winds up to 5 mph shifting to the west in the afternoon.

Friday Night: Mostly clear. Lows 48 to 56. West winds 5 to 10 mph shifting to the northeast after midnight.

Saturday: Sunny. Highs 72 to 82.

Saturday Night: Partly cloudy. Lows 50 to 58.

Sunday: Sunny in the morning, then partly sunny with chance of rain showers in the afternoon. Highs 72 to 82. Chance of showers 30 percent.

Sunday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 52 to 58.

Monday: Mostly sunny. Chance of rain showers in the afternoon. Highs 70 to 80. Chance of showers 40 percent.

Monday Night: Mostly cloudy. Chance of rain showers in the evening. Lows 49 to 55. Chance of showers 30 percent.

Tuesday: Partly sunny. Chance of rain showers in the afternoon. Highs 63 to 73. Chance of showers 50 percent.

Tuesday Night: Mostly cloudy. Chance of rain showers in the evening. Lows 47 to 53. Chance of showers 30 percent.

Wednesday: Partly sunny. Chance of rain showers in the afternoon. Highs 63 to 73. Chance of showers 40 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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