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:

May 18 2021 at 7:55 AM PDT

Next Issuance:

May 19 2021 at 9:00 AM PDT

Monitor Stage: N/A

Flood Stage: 10.0 Feet

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
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
2016	4,080	7.90	May 14, 2016
Historical High Stage/Flow Events (Period of Record - Oct 1916 to Present)
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 (CAZ192)

Today: Sunny. Highs 67 to 75 at 5000 feet and 56 to 66 at 8000 feet.

Tonight: Mostly clear. Lows 43 to 52 at 5000 feet and 34 to 42 at 8000 feet.

Wednesday: Sunny. Highs 62 to 70 at 5000 feet and 51 to 61 at 8000 feet. Over higher elevations, southwest winds around 25 mph in the afternoon, gusts up to 40 mph in the afternoon.

Wednesday Night: Mostly clear. Breezy, colder. Lows 35 to 44 at 5000 feet and 26 to 34 at 8000 feet. Over higher elevations, southwest winds 25 to 30 mph in the evening. Gusts up to 50 mph over higher elevations.

Thursday: Mostly cloudy. Slight chance of snow showers in the afternoon. Little or no snow accumulation. Highs 50 to 58 at 5000 feet and 37 to 47 at 8000 feet. Gusts up to 40 mph in the afternoon.

Thursday Night: Mostly cloudy with a chance of snow showers in the evening, then partly cloudy with a slight chance of snow showers after midnight. Colder. Chance of snow 40 percent. Lows 31 to 39 at 5000 feet and 22 to 28 at 8000 feet.

Friday: Mostly cloudy with a chance of snow showers. Chance of showers and slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs 48 to 54 at 5000 feet and 33 to 43 at 8000 feet.

Friday Night: Mostly cloudy with a slight chance of snow showers in the evening, then partly cloudy after midnight. Lows 33 to 41 at 5000 feet and 22 to 30 at 8000 feet.

Saturday: Mostly cloudy. Chance of showers, snow showers and slight chance of thunderstorms in the afternoon. Not as cool. Chance of precipitation 50 percent. Highs 52 to 60 at 5000 feet and 39 to 49 at 8000 feet.

Saturday Night: Mostly cloudy with a slight chance of snow showers in the evening, then mostly clear after midnight. Lows 35 to 45 at 5000 feet and 25 to 33 at 8000 feet.

Sunday and Sunday Night: Mostly clear. Highs 62 to 68 at 5000 feet and 48 to 58 at 8000 feet. Lows 41 to 51 at 5000 feet and 31 to 39 at 8000 feet.

Monday: Sunny. Not as cool. Highs 69 to 75 at 5000 feet and 55 to 65 at 8000 feet.

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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