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



MERCED RIVER - HAPPY ISLES (HPIC1)
Latitude: 37.73º NLongitude: 119.56º WElevation: 4017 Feet
Location: Mariposa County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jun 30, 2025 at 1:07 PM PDT
Action/Monitor: N/A Minor Flood: 7.5 FeetModerate Flood: 10.0 FeetMajor Flood: 13.27 Feet
Please Note:Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.
Threshold Exceedance Plot                  Product Information        CSV Ensemble Files (Data in kcfs):  Forecast Group  |  HPIC1

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What information is considered in this forecast?
Verification / Historical Plots
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Location Photographs

ESRI™ Locator Map
Flood Impacts
13.27 FeetFlood of Record: 1/2/97. $178 million in damage to Yosemite Valley.
10.0 FeetNorthside Drive at Wosky Pond, Southside Drive at Chapel Meadow, El Capitan crossover, and Sentinel crossover are impassable to vehicles.
8.2 FeetSwinging Bridge overtops. Water on road at Northside Drive, Southsie Drive, El Capitan crossover, and Sentinel crossover.
7.5 FeetFlood Stage. Housekeeping camp and Yosemite Valley backpacker campground begin to flood.
7.0 FeetNorth Pines and Lower Pines campgrounds begin flooding.
Official 7 Day National Weather Service Forecast   (CAZ324)
Today: Sunny. Highs 78 to 90. South winds up to 5 mph shifting to the southwest 5 to 15 mph in the afternoon.

Tonight: Clear. Lows 57 to 65. Northwest winds up to 10 mph shifting to the northeast after midnight.

Wednesday: Sunny. Highs 77 to 89. Southeast winds up to 5 mph shifting to the west in the afternoon.

Wednesday Night: Partly cloudy in the evening then clearing. Lows 58 to 66. Northwest winds 5 to 10 mph shifting to the northeast after midnight.

Thursday: Sunny. Highs 77 to 89. Southeast winds up to 5 mph increasing to southwest 10 to 15 mph in the afternoon.

Thursday Night: Mostly clear. Lows 53 to 61.

Independence Day through Monday: Clear. Highs 71 to 91. Lows 52 to 64.