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SOUTH FORK TRINITY RIVER - HYAMPOM (HYMC1)
Latitude:
40.65º N		Longitude:
123.49º W		Elevation:
1211 Feet
Location: Trinity County in CA
River Group: North Coast
Issuance Time: Jun 16 2025 at 6:46 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.
2025 Seasonal Trend Plot (Year View)Tabular View  |  Select a Different Water Year:  
Note: The chart below functions better in landscape orientation.
Created with Highcharts 9.2.1Daily Observed​Volumes (1000s Ac-​Ft)Water Year 2025 - Day (mm/dd)Seasonal Volumes​(1000s Ac-Ft)Chart context menuSF TRINITY - HYAMPOM, BL (HYMC1) 06/16/2025​Median Forecast: 269 kaf | 126% of Mean | 184% of MedianCreated: 06/16/2025 at 06:46 AM PDT​Mean: 214 kaf​Mean: 214 kaf​Median: 146 kaf​Median: 146 kafApr 02​14.0 kaf​Apr 02​14.0 kaf​Record Low: ​33.0 kaf in 1977​Record Low: ​33.0 kaf in 1977​Record High: ​513 kaf in 1983​Record High: ​513 kaf in 1983Apr-Jul Vol MeanApr-Jul Vol MedianSeason to Date MeanSeason to Date MedianSeason to Date ObsDaily ObsObs PeakApr-Jul Fcst 50%Apr-Jul Fcst 25/75%Apr-Jul Fcst 10/90%Apr-Jul Fcst Max/MinRecord LowRecord HighSnow Model Updates Observed Season to Date Percent of Mean: 128% (248 kaf) Season to Date Mean: 194 kaf​ Historical Apr-Jul Vol Max: 513 kaf in 1983 Historical Apr-Jul Vol Min: 33.0 kaf in 1977​ This product only considers meteorological uncertainty and does not account for hydrologic uncertainty.​ Means/medians are based on the period of Water Years 1980 through 2023.​ Legend entries below can be toggled on/off.05101520253035404550556010/01​202411/01​202412/01​202401/01​202502/01​202503/01​202504/01​202505/01​202506/01​202507/01​202508/01​202509/01​202509/30​2025060120180240300360420480540600660720

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Official 7 Day National Weather Service Forecast   (CAZ108)
Today: Sunny. Highs 69 to 84.

Tonight: Clear. Lows 41 to 51.

Tuesday: Sunny. Highs 75 to 90.

Tuesday Night: Clear. Lows 46 to 56.

Wednesday: Sunny. Highs 76 to 91.

Wednesday Night through Thursday Night: Mostly clear. Lows 41 to 51. Highs 76 to 91.

Friday and Friday Night: Mostly clear. Highs 62 to 77. Lows 37 to 47.

Saturday: Mostly sunny. Highs 57 to 72.

Saturday Night and Sunday: Mostly clear. Lows 37 to 47. Highs 67 to 82.