CNRFC - Hydrology - River Guidance - Graphical RVF

MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)

Latitude: 37.73º N	Longitude: 119.56º W	Elevation: 4017 Feet
Location: Mariposa County in California		River Group: San Joaquin

Issuance Time:

Jan 26 2021 at 2:27 PM PST

Next Issuance:

Jan 27 2021 at 9:00 AM PST

Monitor Stage: N/A

Flood Stage: 8.0 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
2019	4,240	7.79	Jun 13, 2019
2018	8,060	10.09	Apr 7, 2018
2017	5,210	8.45	Jun 20, 2017
2016	2,490	6.30	May 14, 2016
2015	882	4.25	Feb 9, 2015
Historical High Stage/Flow Events (Period of Record - Aug 1915 to Present)
1997	10,100	13.27	Jan 2, 1997
1956	9,840	12.73	Dec 23, 1955
1951	9,260	11.55	Nov 18, 1950

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ192)

Today: Snow. Very windy. Not as cold. Snow accumulation up to 15 inches. Highs 33 to 39 at 5000 feet and 24 to 30 at 8000 feet. South winds 30 to 40 mph with gusts to around 75 mph. Wind chill readings around 7 below.

Tonight: Snow, windy. Snow accumulation up to 12 inches. Lows 29 to 35 at 5000 feet and 21 to 26 at 8000 feet. South winds 25 to 30 mph with gusts to around 55 mph.

Thursday: Snow. Rain in the afternoon, south winds around 25 mph with gusts to around 45 mph in the morning. Windy. Snow accumulation up to 12 inches. Highs 34 to 40 at 5000 feet and 24 to 32 at 8000 feet. Over higher elevations, south winds 25 to 30 mph, gusts up to 45 mph in the morning.

Thursday Night: Snow. Snow accumulation up to 12 inches. Lows 27 to 35 at 5000 feet and 16 to 24 at 8000 feet.

Friday: Snow likely. Chance of snow 70 percent. Snow accumulation up to 3 inches. Highs 34 to 40 at 5000 feet and 23 to 31 at 8000 feet.

Friday Night: Partly cloudy in the evening then becoming mostly cloudy. Colder. Lows 22 to 30 at 5000 feet and 12 to 20 at 8000 feet.

Saturday: Partly sunny in the morning then clearing. Highs 39 to 45 at 5000 feet and 28 to 36 at 8000 feet.

Saturday Night: Mostly clear. Lows 25 to 34 at 5000 feet and 16 to 24 at 8000 feet.

Sunday: Mostly sunny. Highs 43 to 49 at 5000 feet and 31 to 39 at 8000 feet.

Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Slight chance of snow. Lows 29 to 39 at 5000 feet and 20 to 28 at 8000 feet.

Monday: Mostly cloudy with a 50 percent chance of snow and rain. Highs 42 to 48 at 5000 feet and 30 to 38 at 8000 feet.

Monday Night: Snow and rain likely in the evening, then snow likely after midnight. Chance of precipitation 70 percent. Lows 30 to 38 at 5000 feet and 20 to 28 at 8000 feet.

Tuesday: Snow likely in the morning, then chance of snow in the afternoon. Chance of snow 70 percent. Highs 37 to 42 at 5000 feet and 24 to 32 at 8000 feet.

Impacts - E19 Information
7.0 Feet	Campgrounds at North Pines and Housekeeping Camp begin to flood.
9.5 Feet	Substantial road flooding occurs at Sentinel Crossover, Wosky Pond, and Chapel Meadow. Water is approximately one foot deep on the road through Chapel Meadow.
10.0 Feet	Northside and Southside Drive are impassable to vehicles. Water comes 1.5 feet up the side of the Yosemite Creek Lift Station and 1 to 2 inches above the foundation of pumps that control the Housekeeping Camp Lift Station. Water flows two feet over the "swinging bridge".
13.27 Feet	Flood of record - January 2, 1997.

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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