CNRFC - Hydrology - River Guidance - Graphical RVF

MERCED RIVER - YOSEMITE 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 26 2018 at 8:20 AM PDT

Next Issuance:

May 27 2018 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
2016	4,080	7.90	May 14, 2016
2015	2,370	6.16	Feb 9, 2015
2014	1,680	5.33	Apr 19, 2014
2013	2,780	6.62	Apr 30, 2013
2012	4,230	8.04	Apr 26, 2012
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 (CAZ096)

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Mostly cloudy with a chance of showers and slight chance of thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Near the crest, chance of snow showers, showers and slight chance of thunderstorms in the evening, then slight chance of showers after midnight. Chance of precipitation 40 percent. Snow level above 8000 feet. Lows 38 to 48 at 5000 feet and 31 to 37 at 8000 feet.

Sunday: Mostly cloudy. A 20 percent chance of thunderstorms in the afternoon. Near the crest, a 20 percent chance of thunderstorms and snow showers in the afternoon. Not as cool. Highs 63 to 71 at 5000 feet and 54 to 62 at 8000 feet.

Sunday Night: Partly cloudy. Slight chance of thunderstorms in the evening. Near the crest, slight chance of thunderstorms and snow showers in the evening. Lows 42 to 52 at 5000 feet and 32 to 42 at 8000 feet.

Memorial Day: Sunny, warmer. Highs 71 to 79 at 5000 feet and 60 to 68 at 8000 feet.

Monday Night: Mostly clear. Lows 46 to 56 at 5000 feet and 36 to 46 at 8000 feet.

Tuesday: Sunny. Slight chance of thunderstorms in the afternoon. Highs 73 to 82 at 5000 feet and 63 to 71 at 8000 feet.

Tuesday Night and Wednesday: Partly cloudy. Slight chance of thunderstorms. Lows 47 to 57 at 5000 feet and 37 to 47 at 8000 feet. Highs 69 to 79 at 5000 feet and 59 to 69 at 8000 feet.

Wednesday Night: Partly cloudy. Slight chance of thunderstorms in the evening. Colder. Lows 39 to 49 at 5000 feet and 32 to 40 at 8000 feet.

Thursday: Mostly sunny. Slight chance of thunderstorms and snow showers in the afternoon. Highs 59 to 65 at 5000 feet and 51 to 57 at 8000 feet.

Thursday Night: Mostly clear. Slight chance of thunderstorms and snow showers in the evening. Lows 37 to 47 at 5000 feet and 30 to 38 at 8000 feet.

Friday through Saturday: Mostly clear. Highs 63 to 72 at 5000 feet and 54 to 62 at 8000 feet. Lows 39 to 49 at 5000 feet and 31 to 41 at 8000 feet.

Impacts - E19 Information
6.5 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 downstream from Chapel Meadow.
12.5 Feet	Northside Drive and Southside Drive, which are the main 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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