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

 | 

MERCED RIVER - YOSEMITE NP AT 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: Mar 04 2024 at 2:00 PM PSTNext Issuance: Mar 05 2024 at 9:00 AM PST
Monitor Stage: N/A Flood Stage: 7.5 Feet

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
Observed Data Credit
Gage owner logo

Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Verification - Historical Graphical RVF
Month:  
Day:  
Year:  
Cycle:  
To view other verification locations, use our Historical Graphical River Forecast Interface.
Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2022
2,430
6.25
Oct 25, 2021
2021
1,410
5.02
May 7, 2021
2020
2,160
5.96
Apr 30, 2020
2019
4,240
7.79
Jun 13, 2019
2018
8,060
10.09
Apr 7, 2018
 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
Impacts - E19 Information
7.0 FeetCampgrounds at North Pines and Lower Pines begin to flood.
7.5 FeetHousekeeping Camp and Yosemite Valley Backpacker Campground begin to flood.
10.0 FeetNorthside Drive at Wosky Pond, Southside Drive at Chapel Meadow, El Capitan Crossover, and Sentinel Crossover are impassible to vehicles.
13.27 FeetFlood of record - January 2, 1997. $178M in damage to Yosemite Valley.
Official 7 Day National Weather Service Forecast   (CAZ324)
Today: Partly sunny. A 20 percent chance of snow showers in the morning. Highs 36 to 44. Southeast winds up to 5 mph shifting to the south in the afternoon.

Tonight: Mostly cloudy in the evening then clearing. Lows 26 to 32. East winds up to 10 mph.

Tuesday: Mostly sunny. Highs 42 to 50. Southeast winds up to 10 mph shifting to the southwest in the afternoon.

Tuesday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows 28 to 34. East winds up to 10 mph.

Wednesday: Mostly cloudy. Highs 42 to 50. Southeast winds up to 5 mph shifting to the west in the afternoon.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 27 to 33.

Thursday: Partly sunny. Highs 42 to 50.

Thursday Night: Mostly clear. Lows 27 to 33.

Friday: Sunny. Highs 48 to 56.

Friday Night: Mostly clear. Lows 30 to 36.

Saturday: Mostly sunny. Highs 47 to 55.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 31 to 37.

Sunday: Mostly sunny. Highs 47 to 55.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS San Joaquin Valley-Hanford Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.