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NWM Operational Cycles: Cycling Forecast Met Forcing Outputs 1-km spatial fluxes (water & energy); MRMS QPE 250-m routed fluxes Hourly -3 - 0 hrs and HRRR/RAP (water); blend NHDPlus channel routing 1-km spatial fluxes (water & energy); Downscaled 250-m routed fluxes HRRR/RAP Hourly 1 – 18 hrs (water); Blend NHDPlus channel routing 1-km spatial fluxes (water & energy); Downscaled 250-m routed fluxes 4x Daily to 10 days GFS (water); NHDPlus channel routing 1-km spatial fluxes Downscaled & (water & energy); Daily x 16 NLDAS2 Bias- to 30 days NHDPlus channel ensembles Corrected CFS routing !"#$%&'()*+%,-&./0#$&1('2#, 345678

NWM Operational Cycles: Cycling Forecast Met Forcing Outputs 1-km spatial fluxes (water & energy); MRMS QPE 250-m routed fluxes Hourly -3 - 0 hrs and HRRR/RAP (water); blend NHDPlus channel routing 1-km spatial fluxes km spatial fluxes (water & energy); (water & energy); Downscaled Downscaled 250 m routed fluxes 250-m routed fluxes HRRR/RAP HRRR/RAP Hourly Hourly 1 1 – 18 hrs 18 hrs (water); (water); Blend Blend NHDPlus channel NHDPlus channel 9*(:%'+&;(/"<&5*%/+%&=*($)'+,& routing routing 1-km spatial fluxes km spatial fluxes >*(?&+2%&4@A&/B/"-,#,& (water & energy); (water & energy); Downscaled Downscaled 250 m routed fluxes 250-m routed fluxes 4x Daily 4x Daily to 10 days to 10 days ()+=)+,&>(*&$*();2+& GFS GFS (water); (water); NHDPlus channel NHDPlus channel routing routing ?(B#+(*#B;&=)*=(,%,C 1-km spatial fluxes km spatial fluxes Downscaled & Downscaled & (water & energy); (water & energy); Daily x 16 Daily x 16 NLDAS2 Bias NLDAS2 Bias- to 30 days to 30 days NHDPlus channel NHDPlus channel ensembles ensembles Corrected CFS Corrected CFS routing routing !"#$%&'()*+%,-&./0#$&1('2#, 345678 !"#$%&'()*+%,-&./0#$&1('2#, 345678 !"#$%&'()*+%,-&./0#$&1('2#, 345678

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