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

Klamath2026011212_klamath_hefs_csv_daily.zip12-Jan-2026 07:56 AM PST1221K
North Coast2026011212_NorthCoast_hefs_csv_daily.zip12-Jan-2026 07:52 AM PST1147K
Russian/Napa2026011212_RussianNapa_hefs_csv_daily.zip12-Jan-2026 07:55 AM PST1564K
Upper Sacramento2026011212_UpperSacramento_hefs_csv_daily.zip12-Jan-2026 07:18 AM PST1453K
Feather/Yuba2026011212_FeatherYuba_hefs_csv_daily.zip12-Jan-2026 07:28 AM PST2227K
Cache/Putah2026011212_cacheputah_hefs_csv_daily.zip12-Jan-2026 07:55 AM PST211K
American2026011212_american_hefs_csv_daily.zip12-Jan-2026 07:23 AM PST1816K
Salinas/Pajaro2026011212_SalinasPajaro_hefs_csv_daily.zip12-Jan-2026 08:01 AM PST595K
South Bay2026011212_SouthBay_hefs_csv_daily.zip12-Jan-2026 07:32 AM PST454K
Southern California2026011212_SouthernCalifornia_hefs_csv_daily.zip12-Jan-2026 07:33 AM PST1245K
San Diego/Inland2026011212_SanDiego_Inland_hefs_csv_daily.zip12-Jan-2026 07:23 AM PST714K
Tulare2026011212_Tulare_hefs_csv_daily.zip12-Jan-2026 07:54 AM PST884K
San Joaquin2026011212_SanJoaquin_hefs_csv_daily.zip12-Jan-2026 07:24 AM PST1339K
North San Joaquin2026011212_n_sanjoaquin_hefs_csv_daily.zip12-Jan-2026 07:57 AM PST536K
East Sierra2026011212_EastSierra_hefs_csv_daily.zip12-Jan-2026 07:32 AM PST2110K
Humboldt2026011212_Humboldt_hefs_csv_daily.zip12-Jan-2026 07:58 AM PST855K
Water Supply Indices2026011212_WSI_hefs_csv_daily.zip12-Jan-2026 08:12 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

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