National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
Latitude: 37.73º NLongitude: 119.56º WElevation: 4017 Feet
Location: Mariposa County in CaliforniaRiver Group: San Joaquin
Issuance Time: Oct 31 2020 at 7:29 AM PDTNext Issuance: Nov 01 2020 at 9:00 AM PST
Monitor Stage: N/A Flood Stage: 8.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Verification - Historical Graphical RVF
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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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ192)
Tonight: Mostly clear. Haze and areas of smoke. Lows 36 to 46 at 5000 feet and 30 to 40 at 8000 feet.

Sunday: Mostly cloudy. Haze and areas of smoke. Highs 68 to 74 at 5000 feet and 58 to 66 at 8000 feet.

Sunday Night: Partly cloudy. Lows 43 to 53 at 5000 feet and 33 to 41 at 8000 feet.

Monday: Mostly sunny. Highs 69 to 75 at 5000 feet and 57 to 65 at 8000 feet.

Monday Night: Mostly clear. Lows 44 to 54 at 5000 feet and 35 to 45 at 8000 feet.

Tuesday: Mostly sunny. Highs 68 to 74 at 5000 feet and 56 to 64 at 8000 feet.

Tuesday Night through Thursday Night: Mostly clear. Lows 43 to 53 at 5000 feet and 34 to 44 at 8000 feet. Highs 67 to 77 at 5000 feet and 58 to 67 at 8000 feet.

Friday: Mostly sunny. Highs 61 to 68 at 5000 feet and 51 to 59 at 8000 feet.

Friday Night: Mostly cloudy. Colder. Lows 32 to 42 at 5000 feet and 22 to 31 at 8000 feet.

Saturday: Mostly sunny. Highs 47 to 53 at 5000 feet and 37 to 43 at 8000 feet.
Impacts - E19 Information
7.0 FeetCampgrounds at North Pines and Housekeeping Camp begin to flood.
9.5 FeetSubstantial 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 FeetNorthside 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 FeetFlood 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.