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 20 2023 at 2:58 PM PDT

Next Issuance:

Mar 21 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)

Today: Windy. Snow in the morning. Rain showers and slight chance of thunderstorms through the day. Snow showers in the afternoon. Snow may be heavy at times in the late morning and afternoon. Snow accumulation up to 9 inches. Snow level 4900 feet. Highs 37 to 45. East winds 5 to 15 mph with gusts to around 35 mph increasing to south 15 to 30 mph with gusts to around 45 mph in the afternoon. Chance of precipitation near 100 percent.

Tonight: Snow and rain in the evening, then snow likely after midnight. Snow may be heavy at times in the evening. Snow accumulation of 2 to 8 inches. Lows 25 to 31. South winds 10 to 15 mph. Chance of precipitation 90 percent.

Wednesday: Snow likely in the morning, then rain and snow in the afternoon. Snow accumulation up to 1 inch. Total snow accumulation 2 to 18 inches. Snow level 4100 feet. Highs 37 to 43. Southeast winds 5 to 10 mph shifting to the southwest in the afternoon. Chance of precipitation 80 percent.

Wednesday Night: Mostly cloudy. A 40 percent chance of rain and snow in the evening. Lows 25 to 31. Southwest winds up to 10 mph shifting to the southeast after midnight.

Thursday: Partly sunny. A 40 percent chance of rain and snow in the afternoon. Highs 36 to 44. South winds up to 5 mph shifting to the southwest in the afternoon.

Thursday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 23 to 29.

Friday: Mostly sunny. Highs 37 to 45.

Friday Night: Mostly cloudy. Lows 20 to 26.

Saturday: Mostly sunny. A 40 percent chance of snow in the afternoon. Highs 35 to 43.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 18 to 24.

Sunday: Mostly sunny. Highs 37 to 43.

Sunday Night: Mostly cloudy with a 30 percent chance of snow. Lows 22 to 28.

Monday: Chance of snow in the morning, then chance of snow and rain likely in the afternoon. Light snow accumulations. Highs 36 to 44. Chance of precipitation 60 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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