Meteogram, also known as a meteorgram, is a time-based graph of a particular parameter (such as wind, temperature, etc.). It is important to recognize that a meteogram is valid for a single, specific location. With weather models, the location is referred to as a grid point.
This website uses Wings Field (KLOM), Blue Bell PA as its specific location rather than Philadelphia airport (KPHL). KLOM is more central to the Philadelphia region/suburbs than KPHL.