Heat — Philadelphia, Pennsylvania

2011-07-29 · Philadelphia, Pennsylvania

Wider weather episode

Another unseasonably hot and humid day claimed the lives of five people within Philadelphia. The high temperature at the Philadelphia International Airport reached 96 degrees and the afternoon heat index reached between 100F and 105F. This was the start of a four day heat wave for the city. While high temperatures on the 30th and 31st were also in the mid 90s, a frontal passage overnight on the 29th dropped the humidity levels (and thus the afternoon heat index below 100F) the next two days.

Source: NOAA Storm Events Database, event_id 337100. Narrative written by the NWS forecast office that issued the report.