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

Klamath2026042512_klamath_hefs_csv_daily.zip25-Apr-2026 09:05 AM PDT1153K
North Coast2026042512_NorthCoast_hefs_csv_daily.zip25-Apr-2026 09:08 AM PDT1117K
Russian/Napa2026042512_RussianNapa_hefs_csv_daily.zip25-Apr-2026 09:20 AM PDT1332K
Upper Sacramento2026042512_UpperSacramento_hefs_csv_daily.zip25-Apr-2026 08:48 AM PDT1428K
Feather/Yuba2026042512_FeatherYuba_hefs_csv_daily.zip25-Apr-2026 08:47 AM PDT2155K
Cache/Putah2026042512_cacheputah_hefs_csv_daily.zip25-Apr-2026 09:00 AM PDT205K
American2026042512_american_hefs_csv_daily.zip25-Apr-2026 08:44 AM PDT1757K
Salinas/Pajaro2026042512_SalinasPajaro_hefs_csv_daily.zip25-Apr-2026 09:20 AM PDT515K
South Bay2026042512_SouthBay_hefs_csv_daily.zip25-Apr-2026 09:21 AM PDT380K
Southern California2026042512_SouthernCalifornia_hefs_csv_daily.zip25-Apr-2026 09:26 AM PDT873K
San Diego/Inland2026042512_SanDiego_Inland_hefs_csv_daily.zip25-Apr-2026 09:21 AM PDT589K
Tulare2026042512_Tulare_hefs_csv_daily.zip25-Apr-2026 09:03 AM PDT822K
San Joaquin2026042512_SanJoaquin_hefs_csv_daily.zip25-Apr-2026 08:46 AM PDT1296K
North San Joaquin2026042512_n_sanjoaquin_hefs_csv_daily.zip25-Apr-2026 09:03 AM PDT499K
East Sierra2026042512_EastSierra_hefs_csv_daily.zip25-Apr-2026 09:36 AM PDT1956K
Humboldt2026042512_Humboldt_hefs_csv_daily.zip25-Apr-2026 09:35 AM PDT670K
Water Supply Indices2026042512_WSI_hefs_csv_daily.zip25-Apr-2026 09:37 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