| MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1) | ||
| Latitude: 37.73º N | Longitude: 119.56º W | Elevation: 4017 Feet |
| Location: Mariposa County in CA | ||
| River Group: San Joaquin | ||
| Forecast Issued: | May 08 2025 at 8:12 AM PDT | Next Issuance: | May 09 2025 at 9:00 AM PDT |
| Action/ Monitor: N/A | Minor Flood: 7.5 Ft | Moderate Flood: 10.0 Ft | Major Flood: 13.27 Ft |
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Historical Stage/Flow Data |
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|
Water Year
|
Peak Discharge (cfs)
|
Stage (feet)
|
Date
|
| Most Recent 5 Years | |||
2024 |
2,980 |
6.80 |
May 19, 2024 |
2023 |
4,980 |
8.42 |
May 23, 2023 |
2022 |
2,430 |
6.25 |
Oct 25, 2021 |
2021 |
1,410 |
5.02 |
May 7, 2021 |
2020 |
2,160 |
5.96 |
Apr 30, 2020 |
| 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 |
| 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. |