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

Klamath2026050812_klamath_hefs_csv_daily.zip08-May-2026 08:18 AM PDT1155K
North Coast2026050812_NorthCoast_hefs_csv_daily.zip08-May-2026 08:17 AM PDT1122K
Russian/Napa2026050812_RussianNapa_hefs_csv_daily.zip08-May-2026 08:18 AM PDT1363K
Upper Sacramento2026050812_UpperSacramento_hefs_csv_daily.zip08-May-2026 09:19 AM PDT1369K
Feather/Yuba2026050812_FeatherYuba_hefs_csv_daily.zip08-May-2026 09:05 AM PDT2103K
Cache/Putah2026050812_cacheputah_hefs_csv_daily.zip08-May-2026 09:16 AM PDT199K
American2026050812_american_hefs_csv_daily.zip08-May-2026 09:04 AM PDT1723K
Salinas/Pajaro2026050812_SalinasPajaro_hefs_csv_daily.zip08-May-2026 08:23 AM PDT487K
South Bay2026050812_SouthBay_hefs_csv_daily.zip08-May-2026 08:23 AM PDT373K
Southern California2026050812_SouthernCalifornia_hefs_csv_daily.zip08-May-2026 08:23 AM PDT858K
San Diego/Inland2026050812_SanDiego_Inland_hefs_csv_daily.zip08-May-2026 08:27 AM PDT596K
Tulare2026050812_Tulare_hefs_csv_daily.zip08-May-2026 08:44 AM PDT790K
San Joaquin2026050812_SanJoaquin_hefs_csv_daily.zip08-May-2026 08:47 AM PDT1256K
North San Joaquin2026050812_n_sanjoaquin_hefs_csv_daily.zip08-May-2026 08:43 AM PDT488K
East Sierra2026050812_EastSierra_hefs_csv_daily.zip08-May-2026 08:28 AM PDT1944K
Humboldt2026050812_Humboldt_hefs_csv_daily.zip08-May-2026 08:33 AM PDT648K
Water Supply Indices2026050812_WSI_hefs_csv_daily.zip08-May-2026 09:21 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