In accordance with the Weather Service Modernization Act, 15 U.S.C. 313n (the Act), the National Weather Service (NWS) is publishing an amendment to its criteria for modernization actions requiring certification. This amendment adds criteria unique to closing a field office to ensure that closure actions will not result in any degradation of service. Closing a field office is the final step in an often complex transition process in which a field office is carefully phased out at the same time as one or more associated Weather Forecast Offices (WFO) assume the service responsibilities for that office.