Excessive Heat — Southern Lycoming, Pennsylvania

2011-07-21 to 2011-07-22 · Southern Lycoming, Pennsylvania

Event narrative

Heat index values exceeded 105 degrees.

Wider weather episode

A dangerous heat wave spread eastward from the Central U.S. and impacted much of the Mid-Atlantic and Northeast states from July 21-22. Very hot afternoon temperatures near and above record levels in the upper 90s and low 100s combined with dewpoints in the upper 60s to mid 70s to create heat index values between 105 and 115 degrees. Several record high minimum temperatures were also recorded with overnight readings around 80 degrees in some areas. The most intense heat and humidity were felt across the Middle and Lower Susquehanna Valley, where poor air quality further contributed to extremely oppressive conditions. The heat wave lasted several days but peaked on July 21-22. Numerous cooling and senior centers were opened to provide relief from the dangerous heat. The heat also put significant stress on power stations and HVAC systems with localized rolling blackouts and loss of AC reported in some locations.

Source: NOAA Storm Events Database, event_id 315769. Narrative written by the NWS forecast office that issued the report.