Across Pennsylvania:
Dangerous conditions are expected as the right conditions for freezing rain develop, which will cause problems across Pennsylvania. This is likely to lead to a treacherous situation marked by ice formation, resulting in icy roads and hazardous conditions. This development is anticipated to begin early Tuesday morning and continue throughout the day. Further information and regional specifics of the forecast can be found below.
Overall Forecast:
In the mid to upper levels of the atmosphere, a shortwave trough, accompanied by an influx of moisture, is expected to move through the area and enable the formation of precipitation across the region. A surface boundary, expected to become a warm front, will border Pennsylvania (PA) and New York (NY). Areas south of this boundary will have a risk of freezing rain due to the present conditions, while areas to the north, especially in NY, are expected to receive snow. This boundary will be influenced by atmospheric temperature variations, with a notable warm-up at approximately 850mb expected to melt any frozen precipitation aloft. This will result in it falling as rain and subsequently re-freezing upon reaching the ground, leading to ideal conditions for ice formation across the area.