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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: | May 09 2025 at 9:11 AM PDT |
| Please Note: | Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty. Flow data on this product are unregulated / full natural flow. |
| 4x5-Day Probability Plot |
| Tabular 4 x 5-Day Streamflow Volume Data | |||||
| Observed Peak 1-Day Streamflow Volume: (April 1 at 12 UTC to Current Date at 12 UTC) | Observed 05/09/2025 2.9kaf | ||||
| Forecast Peak 1-Day Streamflow Volume: (Current Date at 12 UTC to August 1 at 12 UTC) | 10% (Max) 05/14/2025 4.8kaf | 25% 05/12/2025 4.7kaf | 50% (Prob) 05/12/2025 4.6kaf | 75% 05/12/2025 4.4kaf | 90% (Min) 05/12/2025 4.3kaf |
| Tabular 5-Day Volume Accumulations (1000s of Acre-Feet) | ||||
| Probability | 05/09 to 05/14 | 05/14 to 05/19 | 05/19 to 05/24 | 05/24 to 05/29 |
| 10% | 20.1 kaf | 16.1 kaf | 18.6 kaf | 15.0 kaf |
| 25% | 19.5 kaf | 14.6 kaf | 17.2 kaf | 14.4 kaf |
| 50% (Median) | 19.1 kaf | 12.9 kaf | 15.4 kaf | 12.2 kaf |
| 75% | 18.4 kaf | 11.7 kaf | 13.1 kaf | 9.5 kaf |
| 90% | 18.1 kaf | 10.5 kaf | 11.8 kaf | 8.7 kaf |
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ324) |
| Today: Warmer, sunny. Highs 72 to 84. South winds up to 5 mph shifting to the southwest in the afternoon. Tonight: Mostly clear. Lows 54 to 62. Northeast winds up to 5 mph. Saturday: Sunny. Highs 74 to 84. Southeast winds up to 10 mph shifting to the southwest in the afternoon. Saturday Night: Mostly clear. Lows 52 to 58. Southwest winds 5 to 10 mph with gusts to around 25 mph shifting to the southeast after midnight. Sunday: Sunny. Highs 64 to 74. South winds up to 10 mph increasing to southwest 10 to 20 mph with gusts to around 35 mph in the afternoon. Sunday Night and Monday: Cooler. Mostly clear. Lows in the upper 40s. Highs 53 to 65. Monday Night: Colder. Mostly cloudy. Chance of rain in the evening, then chance of rain and snow after midnight. Lows 35 to 41. Chance of precipitation 50 percent. Tuesday: Mostly sunny. Chance of rain showers in the afternoon. Highs 45 to 55. Chance of showers 40 percent. Tuesday Night: Mostly cloudy in the evening then clearing. Lows 34 to 40. Wednesday: Not as cool. Sunny. Highs 54 to 64. Wednesday Night: Partly cloudy. Lows 40 to 46. Thursday: Warmer, sunny. Highs 60 to 70. |
| 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. |