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

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MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
Latitude: 37.73º NLongitude: 119.56º WElevation: 4017 Feet
Location: Mariposa County in CaliforniaRiver Group: San Joaquin
Issuance Time: Nov 28 2022 at 1:51 PM PSTNext Issuance: Nov 29 2022 at 9:00 AM PST
Monitor Stage: N/A Flood Stage: 8.0 Feet

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

Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2017
5,210
8.45
Jun 20, 2017
 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
Official 7 Day National Weather Service Forecast   (CAZ324)
Tonight: Colder. Mostly clear. Areas of frost early in the evening. Widespread frost late in the evening. Lows 24 to 32. East winds up to 5 mph.

Tuesday: Sunny. Highs 43 to 51. Southwest winds up to 5 mph.

Tuesday Night: Mostly clear. Lows 29 to 37. East winds up to 5 mph.

Wednesday: Mostly sunny. Highs 44 to 52. South winds up to 10 mph.

Wednesday Night: Mostly clear in the evening, then mostly cloudy with a 50 percent chance of rain and snow after midnight. Near steady temperature in the mid 30s. Southeast winds up to 5 mph.

Thursday: Chance of snow and rain in the morning, then rain and snow in the afternoon. Snow may be heavy at times in the afternoon. Heavy snow accumulations. Highs 36 to 44. Chance of precipitation 90 percent.

Thursday Night: Rain and snow in the evening, then rain likely after midnight. Snow may be heavy at times in the evening. Heavy snow accumulations. Lows 25 to 33. Chance of precipitation 80 percent.

Friday and Friday Night: Mostly cloudy. Highs 37 to 45. Lows 25 to 33.

Saturday: Mostly cloudy. Chance of rain in the morning, then chance of rain and snow in the afternoon. Highs 38 to 46. Chance of precipitation 50 percent.

Saturday Night: Rain and snow likely. Moderate snow accumulations. Near steady temperature in the mid 30s. Chance of precipitation 60 percent.

Sunday: Cloudy in the morning then becoming partly sunny. A 50 percent chance of snow and rain. Highs 34 to 42.

Sunday Night and Monday: Partly cloudy. Lows 22 to 30. Highs 36 to 44.
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.
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.