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: Jun 14 2021 at 7:35 AM PDTNext Issuance: Jun 15 2021 at 9:00 AM PDT
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
2020
2,160
5.96
Apr 30, 2020
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
 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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ192)
Today: Sunny, breezy. Highs 77 to 85 at 5000 feet and 67 to 77 at 8000 feet. Southwest winds 25 to 30 mph with gusts to around 45 mph over higher elevations.

Tonight: Partly cloudy. Lows 57 to 67 at 5000 feet and 49 to 59 at 8000 feet.

Wednesday: Mostly sunny. Warmer. Highs 87 to 95 at 5000 feet and 76 to 84 at 8000 feet.

Wednesday Night: Partly cloudy. Lows 65 to 75 at 5000 feet and 56 to 64 at 8000 feet.

Thursday: Mostly sunny. Highs 89 to 97 at 5000 feet and 77 to 85 at 8000 feet.

Thursday Night: Partly cloudy. Lows 63 to 73 at 5000 feet and 54 to 62 at 8000 feet.

Friday and Friday Night: Mostly clear. Highs 88 to 96 at 5000 feet and 76 to 84 at 8000 feet. Lows 62 to 72 at 5000 feet and 53 to 61 at 8000 feet.

Saturday: Sunny. Highs 88 to 94 at 5000 feet and 74 to 82 at 8000 feet.

Saturday Night: Mostly clear. Lows 59 to 69 at 5000 feet and 50 to 58 at 8000 feet.

Sunday: Sunny. Highs 83 to 90 at 5000 feet and 71 to 79 at 8000 feet.

Sunday Night: Mostly clear. Lows 57 to 67 at 5000 feet and 49 to 56 at 8000 feet.

Monday: Sunny. Highs 81 to 89 at 5000 feet and 69 to 79 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.