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

Klamath2026052112_klamath_hefs_csv_daily.zip21-May-2026 07:10 AM PDT1108K
North Coast2026052112_NorthCoast_hefs_csv_daily.zip21-May-2026 07:28 AM PDT1050K
Russian/Napa2026052112_RussianNapa_hefs_csv_daily.zip21-May-2026 07:45 AM PDT1224K
Upper Sacramento2026052112_UpperSacramento_hefs_csv_daily.zip21-May-2026 07:19 AM PDT1332K
Feather/Yuba2026052112_FeatherYuba_hefs_csv_daily.zip21-May-2026 07:28 AM PDT2067K
Cache/Putah2026052112_cacheputah_hefs_csv_daily.zip21-May-2026 07:31 AM PDT187K
American2026052112_american_hefs_csv_daily.zip21-May-2026 07:31 AM PDT1706K
Salinas/Pajaro2026052112_SalinasPajaro_hefs_csv_daily.zip21-May-2026 12:10 PM PDT484K
South Bay2026052112_SouthBay_hefs_csv_daily.zip21-May-2026 07:48 AM PDT372K
Southern California2026052112_SouthernCalifornia_hefs_csv_daily.zip21-May-2026 07:53 AM PDT857K
San Diego/Inland2026052112_SanDiego_Inland_hefs_csv_daily.zip21-May-2026 07:53 AM PDT590K
Tulare2026052112_Tulare_hefs_csv_daily.zip21-May-2026 07:45 AM PDT794K
San Joaquin2026052112_SanJoaquin_hefs_csv_daily.zip21-May-2026 07:49 AM PDT1252K
North San Joaquin2026052112_n_sanjoaquin_hefs_csv_daily.zip21-May-2026 07:47 AM PDT474K
East Sierra2026052112_EastSierra_hefs_csv_daily.zip21-May-2026 07:57 AM PDT1885K
Humboldt2026052112_Humboldt_hefs_csv_daily.zip21-May-2026 07:59 AM PDT622K
Water Supply Indices2026052112_WSI_hefs_csv_daily.zip21-May-2026 07:58 AM PDT213K

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