Something labeled semidiurnal occurs this often
[DOC] [TLE] Diurnal vs. semi-diurnal tides [PAR] Semidiurnal or semidaily tides - have two high tides & two low tides of ... 
Semidiurnal tides often easy to predict because high (or low) tides occur a 
consistent... [DOC] [TLE] Atmospheric tide - Wikipedia [PAR] Atmospheric tides are global-scale periodic oscillations of the atmosphere.