One last snowfall is bearing down on the region. Precipitation will move into Western PA around midnight tonight in the form of moderate snow. Snow will continue through the night in areas across the Laurel Highlands up into Northwest PA. By 3-5 AM, the leading edge of snow will move into Central PA. Finally by 5-8 AM snow will move into Eastern PA, including Lancaster, Allentown, Philadelphia and all surrounding areas.
Saturday Morning is when things will get interesting as an inverted trough sets up across Southeastern PA, extending into parts of Central PA. An inverted trough in simple terms is a relatively thin, yet heavy and persistent band of snow that is very slow moving and can deliver snowfall rates of over an inch an hour.
It’s impossible to predict the exact region this will setup over but we do have a good idea of the general area. In the stated areas (SE-PA, C-PA), snow could last through the entire morning and into Saturday Afternoon before exiting the area. Furthermore, this event will be very elevation-based as we are in April. In addition, we do expect snowfall to stick to the pavement in areas that do receive heavier snow bands. With that said, grassy areas will begin to cover first.
Josh has been passionate about weather as long as his memory dates! From watching the Weather Channel at age 7, to making hand-drawn hurricane maps at age 11, starting his first weather site at 13, and founding PWA at 15 and forecasting for the state for the past 9 years, Josh's interest in weather has never dwindled! As difficult as it is, he greatly enjoys forecasting for Pennsylvania due to its countless microclimates. The state is an East Coast severe weather hotspot and nearly always home to the rain/snow line during winter storms!
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