Synoptic scale weather involves long-term weather events at a planetary scale, such as pressure systems and fronts. Synoptic weather may enhance or suppress [[Mesoscale Convergence]] phenomena, or may produce areas of convergence independent of those processes.
While surface lows and troughs describe areas of general convergence, they typically lack the organization or localized strength for useable lift. Glider pilots have had success soaring in convergence along frontal boundaries, however, this presents additional hazards and concerns. A strong, fast-moving front may provide good lift, but is transitory and often produces adverse weather, while a weaker, slow-moving front may only provide marginal lift.
![[frontal convergence.png]]