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: Oct 01 2023 at 8:53 AM PDTNext Issuance: Oct 02 2023 at 9:00 AM PDT
Monitor Stage: N/A Flood Stage: 8.0 Feet

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 Housekeeping Camp begin to flood.
9.5 FeetSubstantial road flooding occurs at Sentinel Crossover, Wosky Pond, and Chapel Meadow. Water is approximately one foot deep on the road through Chapel Meadow.
10.0 FeetNorthside and Southside Drive are impassable to vehicles. Water comes 1.5 feet up the side of the Yosemite Creek Lift Station and 1 to 2 inches above the foundation of pumps that control the Housekeeping Camp Lift Station. Water flows two feet over the "swinging bridge".
13.27 FeetFlood of record - January 2, 1997.
Official 7 Day National Weather Service Forecast   (CAZ324)
Today: Partly sunny early in the morning, then chance of rain late in the morning. Cloudy with chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 50 to 60. Southwest winds up to 10 mph. Chance of precipitation 50 percent.

Tonight: Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening, then mostly clear after midnight. Lows 37 to 45. South winds up to 5 mph shifting to the east after midnight. Chance of precipitation 50 percent.

Monday: Warmer, sunny. Highs 57 to 67. East winds up to 5 mph shifting to the west in the afternoon.

Monday Night: Mostly clear. Lows 42 to 50. Northwest winds 5 to 10 mph shifting to the northeast after midnight.

Tuesday: Warmer, sunny. Highs 63 to 75. East winds up to 5 mph shifting to the west in the afternoon.

Tuesday Night through Thursday: Clear. Lows 45 to 58. Highs 69 to 82.

Thursday Night through Saturday: Mostly clear. Lows 50 to 61. Highs 71 to 82.
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.