Prior values for SWOT discharge estimation were derived from the ensemble mean discharge predicted by two machine learning models, δHBV2 and GRADES-hydroDL (see References for model descriptions). The following prior variables were computed and replaced: max_q min_q mean_q monthly_q (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec) two_year_return_q flow_duration_q (0.01, 0.06, 0.11, 0.16, ..., 0.91, 0.96) logQ_sd Name ML Discharge Peiord SWORD MLprior_v1.0_SWORDv16 03/31/2023 - 02/28/2025 v16 MLprior_v2.0_SWORDv17 03/31/2023 - 02/28/2025 v17 MLprior_v2.1_SWORDv17 03/31/2023 - 12/31/2025 v17 NOTE: "ML Discharge Period" indicates the period of machine learning predicted discharge used to compute the prior variables