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

Klamath2026050512_klamath_hefs_csv_daily.zip05-May-2026 08:29 AM PDT1124K
North Coast2026050512_NorthCoast_hefs_csv_daily.zip05-May-2026 08:33 AM PDT1084K
Russian/Napa2026050512_RussianNapa_hefs_csv_daily.zip05-May-2026 08:33 AM PDT1291K
Upper Sacramento2026050512_UpperSacramento_hefs_csv_daily.zip05-May-2026 08:12 AM PDT1359K
Feather/Yuba2026050512_FeatherYuba_hefs_csv_daily.zip05-May-2026 08:10 AM PDT2101K
Cache/Putah2026050512_cacheputah_hefs_csv_daily.zip05-May-2026 08:25 AM PDT197K
American2026050512_american_hefs_csv_daily.zip05-May-2026 08:07 AM PDT1732K
Salinas/Pajaro2026050512_SalinasPajaro_hefs_csv_daily.zip05-May-2026 08:41 AM PDT471K
South Bay2026050512_SouthBay_hefs_csv_daily.zip05-May-2026 08:41 AM PDT375K
Southern California2026050512_SouthernCalifornia_hefs_csv_daily.zip05-May-2026 08:41 AM PDT839K
San Diego/Inland2026050512_SanDiego_Inland_hefs_csv_daily.zip05-May-2026 08:50 AM PDT586K
Tulare2026050512_Tulare_hefs_csv_daily.zip05-May-2026 08:25 AM PDT808K
San Joaquin2026050512_SanJoaquin_hefs_csv_daily.zip05-May-2026 08:09 AM PDT1261K
North San Joaquin2026050512_n_sanjoaquin_hefs_csv_daily.zip05-May-2026 08:26 AM PDT502K
East Sierra2026050512_EastSierra_hefs_csv_daily.zip05-May-2026 08:51 AM PDT1920K
Humboldt2026050512_Humboldt_hefs_csv_daily.zip05-May-2026 08:49 AM PDT613K
Water Supply Indices2026050512_WSI_hefs_csv_daily.zip05-May-2026 08:52 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