Pittsburgh is bracing for a wintry mix of weather as the National Weather Service in Pittsburgh predicts a return of rain and snow along with a potential winter storm tracking westward, according to their Area Forecast Discussion. Starting today and continuing into Thursday, a trough and associated front will usher in snowfall, transitioning to a rain-snow mix, and resulting in 2 to 5 inches of accumulation mainly along and north of I-80, with northerners poised to witness an enduring Winter Weather Advisory.
As the weekend looms, the uncertainty of snow totals hinges on the track of low pressure, with various model solutions showing a notable disparity in outcomes—a stark reminder of our often tenuous grip on predicting the capriciousness of weather patterns. If the streams in the upper atmosphere cooperate and merge effectively, Pittsburgh could see itself under a blanket up to 13 inches thick; however, should the streams remain aloof, the snow could pass modestly to the east, sparing the Steel City from the storm's full might.
The city's upcoming subzero mean daily temperatures, forecasted from Friday through the first half of next week, threaten to wreak havoc on infrastructure, potentially freezing pipes and straining the energy grid. The National Weather Service alerts that a sustained temperature below normal by 12 degrees Fahrenheit for over 48 hours could lead to significant infrastructure issues, a situation Pittsburgh is watching unfold with the anticipation of daily mean temperatures hovering around 15 degrees Fahrenheit.
Aviation interests are not spared from this cold embrace, with the National Weather Service cautioning of VFR conditions shifting to IFR/MVFR with the onset of snow post 18z, the gusts of wind could put an extra edge on a city's winter woe it's likely that by the late evening, snow will give way to persistent showers behind a cold front leaving behind a trail of MVFR ceilings.
In terms of preparedness, the Winter Weather Advisory, from 10 AM this morning to 10 AM EST Thursday, encompasses PAZ007>009, 015, 016, 077, 078, ensuring that those within its grasp are well-aware and as ready as they can be for the wintry offering draped over the region. With Ohio and West Virginia currently clear of such advisories, only time will tell how the weekend's developments may alter this tapestry of advisories and watches.
