As the humidity clings with the kind of persistence Pittsburghers have come to expect in the heart of summer, Pittsburgh's National Weather Service (NWS) has laid out, in no uncertain terms, the weather blueprint for the coming days. The National Weather Service forecast, released early this Tuesday morning, speaks of a familiar dance with patchy fog clearing by mid-morning, and the potential for isolated showers and thunderstorms by late afternoon.
The dice roll of precipitation continues into Wednesday. "Precipitation chances continue ahead of an approaching upper trough and attendant cold front," reports NWS Pittsburgh's Area Forecast Discussion. Here, the narrative is less about if, but when and where the rain will fall, as temperatures and moisture continue on their above-normal trend. The northwest reaches of Pennsylvania could see some theatrics in the sky by Wednesday evening, with the possibility of marginal storms bringing threats of gusting winds.
Thursday will likely brandish the most significant rain chances of the week, courtesy of an assertive cold front sweeping through during daylight. The weather front is poised to deliver what may be a less dramatic show, as storms could remain sub-severe. Yet, inhabitants of the city of bridges should not discount the lingering ensemble of potential atmospheric unrest.
Pittsburgh will take a collective sigh of relief as conditions are expected to shift. Ensemble forecasts herald the arrival of a building ridge, indicative of drier weather and the return of seasonably warm temperatures for weekend plans. "Ensemble clusters are in good agreement on a building ridge into the weekend and early next week," states the NWS Pittsburgh report, signaling that the dance with moisture may take a bow, at least for a brief interlude.
For those with flights in mind, visibility may be a tumbling die in the early morning hours, particularly in areas that recently experienced rainfall. Aviation forecasts suggest variability in fog coverage, with some restrictions persisting through sunrise. As the fog lifts, navigators of the skies can anticipate transitioning to clearer conditions, with the possibility of scattered showers and thunderstorms keeping things interesting through Thursday. NWS Pittsburgh foresees a return to Visual Flight Rules (VFR) conditions by Friday under high-pressure governance.
