CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)

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

Issuance Time:

Sep 27 2023 at 8:40 AM PDT

Next Issuance:

Sep 28 2023 at 9:00 AM PDT

Monitor Stage: N/A

Flood Stage: 8.0 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	2,430	6.25	Oct 25, 2021
2021	1,410	5.02	May 7, 2021
2020	2,160	5.96	Apr 30, 2020
2019	4,240	7.79	Jun 13, 2019
2018	8,060	10.09	Apr 7, 2018
Historical High Stage/Flow Events (Period of Record - Aug 1915 to Present) - Ranked by Flow
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

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.

Official 7 Day National Weather Service Forecast (CAZ324)

Today: Sunny. Highs 70 to 82. South winds up to 5 mph shifting to the west in the afternoon.

Tonight: Clear. Lows 49 to 57. East winds up to 5 mph.

Thursday: Sunny. Highs 68 to 80. Southeast winds up to 5 mph shifting to the southwest in the afternoon.

Thursday Night: Mostly clear. Lows 47 to 55. Northwest winds up to 10 mph shifting to the east after midnight.

Friday: Sunny. Highs 65 to 75. East winds up to 5 mph shifting to the southwest 5 to 15 mph in the afternoon.

Friday Night: Colder. Partly cloudy in the evening then becoming mostly cloudy. Lows 41 to 49.

Saturday: Cooler. Rain showers likely in the afternoon. Highs 49 to 59. Chance of showers 60 percent.

Saturday Night: Mostly cloudy. Chance of rain in the evening. Lows 38 to 46. Chance of rain 40 percent.

Sunday and Sunday Night: Mostly cloudy. Highs 50 to 60. Lows 37 to 45.

Monday: Warmer. Mostly sunny. Highs 56 to 66.

Monday Night and Tuesday: Mostly clear. Lows 42 to 50. Highs 63 to 73.

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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Verification - Historical Graphical RVF
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