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

Klamath2026041512_klamath_hefs_csv_daily.zip15-Apr-2026 07:44 AM PDT1187K
North Coast2026041512_NorthCoast_hefs_csv_daily.zip15-Apr-2026 07:42 AM PDT1158K
Russian/Napa2026041512_RussianNapa_hefs_csv_daily.zip15-Apr-2026 07:44 AM PDT1487K
Upper Sacramento2026041512_UpperSacramento_hefs_csv_daily.zip15-Apr-2026 07:12 AM PDT1434K
Feather/Yuba2026041512_FeatherYuba_hefs_csv_daily.zip15-Apr-2026 07:15 AM PDT2174K
Cache/Putah2026041512_cacheputah_hefs_csv_daily.zip15-Apr-2026 07:33 AM PDT213K
American2026041512_american_hefs_csv_daily.zip15-Apr-2026 07:17 AM PDT1775K
Salinas/Pajaro2026041512_SalinasPajaro_hefs_csv_daily.zip15-Apr-2026 07:47 AM PDT537K
South Bay2026041512_SouthBay_hefs_csv_daily.zip15-Apr-2026 08:03 AM PDT401K
Southern California2026041512_SouthernCalifornia_hefs_csv_daily.zip15-Apr-2026 07:52 AM PDT875K
San Diego/Inland2026041512_SanDiego_Inland_hefs_csv_daily.zip15-Apr-2026 07:51 AM PDT578K
Tulare2026041512_Tulare_hefs_csv_daily.zip15-Apr-2026 07:32 AM PDT816K
San Joaquin2026041512_SanJoaquin_hefs_csv_daily.zip15-Apr-2026 07:45 AM PDT1286K
North San Joaquin2026041512_n_sanjoaquin_hefs_csv_daily.zip15-Apr-2026 07:40 AM PDT502K
East Sierra2026041512_EastSierra_hefs_csv_daily.zip15-Apr-2026 08:04 AM PDT1996K
Humboldt2026041512_Humboldt_hefs_csv_daily.zip15-Apr-2026 08:01 AM PDT724K
Water Supply Indices2026041512_WSI_hefs_csv_daily.zip15-Apr-2026 07:58 AM PDT215K

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