This is a catalog of 500 mb heights, height anomalies and preciptable water anomlies during previous strong (57-58, 65-66, 72-73) and very strong (82-83, 97-98) El Niño events.

Strong El Niño (1957-58, 1965-66, 1972-73)	Very Strong El Niño (1982-83, 1997-98)
Mean 500 mb Heights 500 mb height Anomaly Precipitable Water Anomaly	Mean 500 mb Heights 500 mb height Anomaly Precipitable Water Anomaly