Quick Facts
- Type
- TAF Change Group
- Also Known As
- BECMG
- Used By
- Pilots, Dispatchers
Definition#
BECMG (Becoming) is a change group used in TAFs to indicate that weather conditions will gradually change from one state to another over a defined period (typically 2–4 hours).
Why It Matters Operationally#
BECMG groups inform dispatchers and pilots when conditions are expected to deteriorate or improve, directly affecting alternate planning, fuel reserves, and go/no-go decisions.
Example#
BECMG 1216/1218 3SM BR OVC010
Means: between 1600Z and 1800Z on the 12th, conditions will become 3 statute miles visibility in mist with overcast at 1,000 feet.