Add a new parameter to control cutoff level for implicit RF#962

jkbk2004 merged 5 commits into

NOAA-EMC:developNOAA-EMC/ufsatm:developfrom

XiaqiongZhou-NOAA:rf_fast_wXiaqiongZhou-NOAA/ufsatm:rf_fast_wCopy head branch name to clipboard