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

Klamath2025122712_klamath_hefs_csv_daily.zip27-Dec-2025 11:41 AM PST1222K
North Coast2025122712_NorthCoast_hefs_csv_daily.zip27-Dec-2025 10:30 AM PST1154K
Russian/Napa2025122712_RussianNapa_hefs_csv_daily.zip27-Dec-2025 10:32 AM PST1566K
Upper Sacramento2025122712_UpperSacramento_hefs_csv_daily.zip27-Dec-2025 10:12 AM PST1461K
Feather/Yuba2025122712_FeatherYuba_hefs_csv_daily.zip27-Dec-2025 10:11 AM PST2236K
Cache/Putah2025122712_cacheputah_hefs_csv_daily.zip27-Dec-2025 10:15 AM PST216K
American2025122712_american_hefs_csv_daily.zip27-Dec-2025 10:09 AM PST1816K
Salinas/Pajaro2025122712_SalinasPajaro_hefs_csv_daily.zip27-Dec-2025 10:37 AM PST615K
South Bay2025122712_SouthBay_hefs_csv_daily.zip27-Dec-2025 10:37 AM PST479K
Southern California2025122712_SouthernCalifornia_hefs_csv_daily.zip27-Dec-2025 10:38 AM PST1321K
San Diego/Inland2025122712_SanDiego_Inland_hefs_csv_daily.zip27-Dec-2025 10:47 AM PST759K
Tulare2025122712_Tulare_hefs_csv_daily.zip27-Dec-2025 10:10 AM PST894K
San Joaquin2025122712_SanJoaquin_hefs_csv_daily.zip27-Dec-2025 10:12 AM PST1337K
North San Joaquin2025122712_n_sanjoaquin_hefs_csv_daily.zip27-Dec-2025 10:13 AM PST536K
East Sierra2025122712_EastSierra_hefs_csv_daily.zip27-Dec-2025 10:48 AM PST2112K
Humboldt2025122712_Humboldt_hefs_csv_daily.zip27-Dec-2025 10:52 AM PST856K
Water Supply Indices2025122712_WSI_hefs_csv_daily.zip27-Dec-2025 10:51 AM PST217K

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