CNRFC - Hydrology - River Guidance - Graphical RVF

MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)

Latitude: 37.73º N	Longitude: 119.56º W	Elevation: 4017 Feet
Location: Mariposa County in California		River Group: San Joaquin

Issuance Time:

Nov 28 2022 at 1:51 PM PST

Next Issuance:

Nov 29 2022 at 9:00 AM PST

Monitor Stage: N/A

Flood Stage: 8.0 Feet

Plot Type:

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

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
Upstream Photo	Gage House Photo	Downstream Photo

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 Feet	Campgrounds at North Pines and Housekeeping Camp begin to flood.
9.5 Feet	Substantial 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 Feet	Northside 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 Feet	Flood 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.

NWS RSS Feed

Verification - Historical Graphical RVF
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.