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

Long Range Daily Ensemble CSV File Download

Forecast Groups

Forecast Group

Filename

Date/Time Last Modified

Size

Klamath2026050312_klamath_hefs_csv_daily.zip03-May-2026 08:50 AM PDT1140K
North Coast2026050312_NorthCoast_hefs_csv_daily.zip03-May-2026 08:51 AM PDT1117K
Russian/Napa2026050312_RussianNapa_hefs_csv_daily.zip03-May-2026 08:55 AM PDT1340K
Upper Sacramento2026050312_UpperSacramento_hefs_csv_daily.zip03-May-2026 07:44 AM PDT1396K
Feather/Yuba2026050312_FeatherYuba_hefs_csv_daily.zip03-May-2026 07:58 AM PDT2142K
Cache/Putah2026050312_cacheputah_hefs_csv_daily.zip03-May-2026 08:03 AM PDT206K
American2026050312_american_hefs_csv_daily.zip03-May-2026 08:04 AM PDT1746K
Salinas/Pajaro2026050312_SalinasPajaro_hefs_csv_daily.zip03-May-2026 09:06 AM PDT469K
South Bay2026050312_SouthBay_hefs_csv_daily.zip03-May-2026 09:00 AM PDT374K
Southern California2026050312_SouthernCalifornia_hefs_csv_daily.zip03-May-2026 09:07 AM PDT843K
San Diego/Inland2026050312_SanDiego_Inland_hefs_csv_daily.zip03-May-2026 09:10 AM PDT587K
Tulare2026050312_Tulare_hefs_csv_daily.zip03-May-2026 08:19 AM PDT807K
San Joaquin2026050312_SanJoaquin_hefs_csv_daily.zip03-May-2026 08:52 AM PDT1273K
North San Joaquin2026050312_n_sanjoaquin_hefs_csv_daily.zip03-May-2026 08:48 AM PDT507K
East Sierra2026050312_EastSierra_hefs_csv_daily.zip03-May-2026 09:20 AM PDT1945K
Humboldt2026050312_Humboldt_hefs_csv_daily.zip03-May-2026 09:21 AM PDT616K
Water Supply Indices2026050312_WSI_hefs_csv_daily.zip03-May-2026 09:13 AM PDT214K

Note 1: Data represented in the files are in kcfs (thousands of cubic feet per second).

Note 2: Each location includes 44 ensemble members with the first column starting with year 1980 and the last column ending with year 2023. Each historical year is more meaningful beyond the first couple weeks when climatology drives the spread in the ensemble.

Note 3: On October 20, 2022 the Central Coast forecast group was split into two forecast groups (Salinas/Pajaro and South Bay) and the Southern California forecast group was split into two forecast groups (Southern California and San Diego/Inland).

Individual Points

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Forecast Groups Archive

Forecast Group

Start Date

End Date