Convectively Coupled Equatorial Waves has been thought to contribute to a large percentage of the fractional variance of subseasonal rainfall. In fact, with spectrally filtered precipitation compared to the subseasonal precipitation, we can see that certain CCEW can contribute up to 30% of the rainfall variance. 

From the filtered variance, one can establish linearly regressed dynamic fields associated with waves at a basepoint, which we take to be the point in the eastern Pacific where variance maximizes. Below, we demonstrate the corresponding the filtered OLR aligned with different rainfall events and low-level dynamic fields in the eastern Pacific that are associated with different CCEWs that lead in precipitation fractional variance.