Potential for Heavy Rain and Lightning This Afternoon and Overnight
Heavy rain and lightning are possible later this afternoon and overnight due to warm and humid conditions, with more numerous storms expected overnight as a disturbance pushes through.
Pittsburgh, PA, September 16, 2026 —
Residents can anticipate the possibility of heavy rain and lightning developing later on Wednesday afternoon and continuing through the overnight hours. These weather conditions are attributed to prevailing warm and humid atmospheric conditions.
Meteorological forecasts indicate that more numerous storms are expected to develop and move through the region overnight. This increase in storm activity is associated with an approaching disturbance that is forecast to push across the area.
The combination of heat and moisture in the atmosphere provides the necessary ingredients for storm formation. Warm air holds more moisture, and when lifted or disturbed, this moisture can condense rapidly, leading to the development of precipitation, including potentially heavy rainfall. Lightning is a common byproduct of thunderstorms, generated by electrical charges built up within the storm clouds.
The period of most significant storm development is projected to occur from late afternoon through the overnight period. The specific timing and intensity of these storms may vary, and conditions can change rapidly. Individuals are advised to stay informed about weather updates throughout the day and night.
While the summary does not specify exact locations, the general forecast suggests these conditions could affect a broad area where warm and humid air masses are present.
Story summarized from the original created by Adis Juklo on www.wpxi.com, see more information here.
Media gallery
