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MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
| Latitude: 37.73º N | Longitude: 119.56º W | Elevation: 4017 Feet | | | |
| Location: Mariposa County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Apr 19, 2026 at 8:58 AM PDT |
| Action/Monitor: N/A | Minor Flood: 7.5 Feet | Moderate Flood: 10.0 Feet | Major 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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| Flood Impacts |
| 13.27 Feet | Flood of Record: 1/2/97. $178 million in damage to Yosemite Valley. |
| 10.0 Feet | Northside Drive at Wosky Pond, Southside Drive at Chapel Meadow, El Capitan crossover, and Sentinel crossover are impassable to vehicles. |
| 8.2 Feet | Swinging Bridge overtops. Water on road at Northside Drive, Southsie Drive, El Capitan crossover, and Sentinel crossover. |
| 7.5 Feet | Flood Stage. Housekeeping camp and Yosemite Valley backpacker campground begin to flood. |
| 7.0 Feet | North Pines and Lower Pines campgrounds begin flooding. |
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