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

Klamath2026050412_klamath_hefs_csv_daily.zip04-May-2026 07:40 AM PDT1130K
North Coast2026050412_NorthCoast_hefs_csv_daily.zip04-May-2026 07:39 AM PDT1102K
Russian/Napa2026050412_RussianNapa_hefs_csv_daily.zip04-May-2026 07:52 AM PDT1356K
Upper Sacramento2026050412_UpperSacramento_hefs_csv_daily.zip04-May-2026 07:03 AM PDT1382K
Feather/Yuba2026050412_FeatherYuba_hefs_csv_daily.zip04-May-2026 07:19 AM PDT2134K
Cache/Putah2026050412_cacheputah_hefs_csv_daily.zip04-May-2026 07:22 AM PDT206K
American2026050412_american_hefs_csv_daily.zip04-May-2026 07:22 AM PDT1743K
Salinas/Pajaro2026050412_SalinasPajaro_hefs_csv_daily.zip04-May-2026 07:56 AM PDT470K
South Bay2026050412_SouthBay_hefs_csv_daily.zip04-May-2026 07:54 AM PDT373K
Southern California2026050412_SouthernCalifornia_hefs_csv_daily.zip04-May-2026 07:57 AM PDT847K
San Diego/Inland2026050412_SanDiego_Inland_hefs_csv_daily.zip04-May-2026 08:05 AM PDT585K
Tulare2026050412_Tulare_hefs_csv_daily.zip04-May-2026 07:51 AM PDT804K
San Joaquin2026050412_SanJoaquin_hefs_csv_daily.zip04-May-2026 07:58 AM PDT1272K
North San Joaquin2026050412_n_sanjoaquin_hefs_csv_daily.zip04-May-2026 07:50 AM PDT507K
East Sierra2026050412_EastSierra_hefs_csv_daily.zip04-May-2026 08:06 AM PDT1938K
Humboldt2026050412_Humboldt_hefs_csv_daily.zip04-May-2026 08:04 AM PDT610K
Water Supply Indices2026050412_WSI_hefs_csv_daily.zip04-May-2026 08:01 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

Enter desired location(s) below (some older browsers may allow only one file download at a time):

Forecast Groups Archive

Forecast Group

Start Date

End Date