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 19 2021 at 8:47 AM PDTNext Issuance: Oct 20 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   (CAZ324)
Today: Mostly sunny. Not as cool. Highs 54 to 64. Light winds in the morning becoming southwest around 10 mph in the afternoon.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Lows 36 to 46. Light winds.

Wednesday: Mostly cloudy with a slight chance of showers. Highs 55 to 65. Light winds in the morning becoming southwest around 10 mph in the afternoon.

Wednesday Night: Mostly cloudy. Lows 41 to 51. Light winds.

Thursday: Mostly cloudy. Slight chance of showers in the afternoon. Warmer. Highs 61 to 71. Light winds in the morning becoming southwest around 10 mph in the afternoon.

Thursday Night: Mostly cloudy with a slight chance of showers. Lows 41 to 51.

Friday: Mostly cloudy with a 50 percent chance of showers. Highs 54 to 64.

Friday Night: Cloudy. Chance of showers in the evening, then slight chance of showers after midnight. Chance of showers 40 percent. Lows 38 to 48.

Saturday: Mostly cloudy. Slight chance of showers in the afternoon. Highs 52 to 62.

Saturday Night: Mostly cloudy. Slight chance of showers in the evening, then chance of showers after midnight. Chance of showers 50 percent. Lows 38 to 48.

Sunday: Chance of showers in the morning, then showers likely in the afternoon. Chance of showers 70 percent. Highs 49 to 59.

Sunday Night: Showers likely in the evening, then showers after midnight. Chance of showers 80 percent. Lows 34 to 44.

Monday: Showers in the morning, then showers likely in the afternoon. Chance of showers 80 percent. Highs 43 to 53.
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.