Definition
A specialized meteorological unit within the FAA's Air Traffic Control System Command Center that provides aviation weather analysis and forecasts directly to traffic flow managers, supporting national airspace flow control decisions during weather events that affect routes, airports, or capacity.
Plain English
A team of weather specialists who work alongside the controllers responsible for managing nationwide air traffic flow. They translate weather information into the kind of advice flow managers need when deciding how to reroute, delay, or hold flights because of bad weather.
Context Anchor
Pilots may see CFWU in FAA acronym lists or in discussions of national traffic management, weather delays, reroutes, or ground delay programs.
Derivation
"Central" because the unit serves the whole national system from one location. "Flow" refers to traffic flow management — the work of keeping aircraft moving smoothly through the system. "Weather unit" identifies the team's specialty. The name simply describes what it does: provide weather support to central flow control.
Why Pilots Care
Data from this unit supports decisions that reduce weather-related delays and maintain safe traffic flows.
Grounding Statement
When weather threatens busy routes or airports, the CFWU helps traffic managers understand the impact before aircraft are sent into the affected area.
Intuition Check
Do not read “flow” as the flow of air in the weather. Here, “flow” means the movement of aircraft through the air traffic system.
Example Sentence 1
The ground delay program into Newark was based on a CFWU forecast showing thunderstorms moving into the arrival corridor by mid-afternoon.
Example Sentence 2
Flight planning tools incorporate CFWU advisories to help avoid widespread weather disruptions.