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MERCED RIVER - HAPPY ISLES (HPIC1)
Latitude:
37.73º N		Longitude:
119.56º W		Elevation:
4017 Feet
Location: Mariposa County in CA
River Group: San Joaquin
Issuance Time: Jun 01 2025 at 8:24 AM PDT
Action/
Monitor:
N/A 		Minor
Flood:
7.5 Ft		Moderate
Flood:
10.0 Ft		Major
Flood:
13.27 Ft
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
Created with Highcharts 9.2.1Date/Time (Pacific)River Level (Feet)Flow (CFS)Probability of Threshold Exceedance​(%)Hourly River Level Threshold Exceedance Probabilities​MERCED RIVER - HAPPY ISLES (HPIC1)​Created: 06/01/2025 at 8:24 AM PDTJun 02​Mon​12amJun 03​Tue​12amJun 04​Wed​12amJun 05​Thu​12amJun 06​Fri​12amJun 01​Sun​12pmJun 02​Mon​12pmJun 03​Tue​12pmJun 04​Wed​12pmJun 05​Thu​12pm546781,3987892,1953,1954,40802550751007.5 ft Minor Flood Stage
Created with Highcharts 9.2.1Duration of Peak River​Level Threshold​Exceedance
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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. A 20 percent chance of rain in the late morning and afternoon. Highs 73 to 85. West winds up to 10 mph.

Tonight: Mostly clear. Lows 56 to 62. West winds up to 10 mph shifting to the northeast after midnight.

Tuesday: Sunny. Highs 73 to 85. Southeast winds up to 5 mph shifting to the west in the afternoon.

Tuesday Night: Mostly clear. Lows 55 to 61. West winds up to 10 mph shifting to the northeast after midnight.

Wednesday: Sunny. Highs 72 to 84. East winds up to 5 mph shifting to the southwest in the afternoon.

Wednesday Night through Sunday: Mostly clear. Lows 54 to 65. Highs 72 to 90.

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.