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: Jul 19 2019 at 8:11 AM PDTNext Issuance: Jul 20 2019 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
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
2014
1,190
4.71
May 16, 2014
 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)
Today: Sunny. Highs 75 to 85 at 5000 feet and 66 to 76 at 8000 feet.

Tonight: Clear. Lows 54 to 64 at 5000 feet and 45 to 55 at 8000 feet.

Sunday: Sunny. Highs 80 to 88 at 5000 feet and 68 to 78 at 8000 feet.

Sunday Night: Partly cloudy. Lows 57 to 67 at 5000 feet and 48 to 58 at 8000 feet.

Monday: Mostly cloudy. Highs 81 to 89 at 5000 feet and 70 to 78 at 8000 feet.

Monday Night: Mostly cloudy. Lows 58 to 68 at 5000 feet and 48 to 58 at 8000 feet.

Tuesday and Tuesday Night: Partly cloudy. Highs 81 to 89 at 5000 feet and 70 to 78 at 8000 feet. Lows 59 to 69 at 5000 feet and 49 to 59 at 8000 feet.

Wednesday: Mostly cloudy. Chance of showers and slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs 81 to 89 at 5000 feet and 70 to 78 at 8000 feet.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 59 to 69 at 5000 feet and 49 to 59 at 8000 feet.

Thursday: Mostly cloudy. Chance of showers and slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs 82 to 89 at 5000 feet and 70 to 78 at 8000 feet.

Thursday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 59 to 69 at 5000 feet and 49 to 59 at 8000 feet.

Friday: Mostly cloudy. Chance of showers and slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Highs 82 to 90 at 5000 feet and 70 to 78 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.