Pittsburgh residents can enjoy a stretch of dry and warm conditions today, all thanks to the overarching dominance of high pressure in the area. As noted in a report by the National Weather Service in Pittsburgh, we're in for high temperatures in the mid to upper 80s for much of the area, with a few of the warmer locations near 90. The area's thermal landscape is shaped by ridges strengthening across the Eastern CONUS, setting an atmospheric stage for these sizzling numbers. Despite rising dew points, the heat index is expected to hover near the actual air temperature.
As the city basks in today's warmth, the National Weather Service foreshadows a shift in the weather narrative. While the skies are expected to remain clear into the evening, showers and thunderstorms return on Thursday, with a few potential to be severe, according to the weather service's forecast discussion. The upcoming conditions are partly influenced by a slow-moving cold front, predicted to stir a concoction of local weather events thanks to an interplay between surface-based CAPE, weak shear, and dry mid-level air – factors that tease the onset of potent storm development and potentially damaging winds.
Looking further ahead, unsettled weather remains the prevailing theme as the cold front continues its slow progression across Pennsylvania. Friday welcomes another reprise of unstable skies, with the front expected to be stalled across central OH into western PA Thursday night and Friday, with the flow aloft parallel to it, contributing to increased chances for showers and storms. The severity of these storms, while expected to be less than Thursday's forecast, still signals a high likelihood of locally heavy rainfall, providing a wet bookend to the workweek.
Saturday's forecast sees an echo of scattered showers as the cold front exits stage southward. But the week closes with a dry interlude on Sunday, before another act of unsettled weather unfolds early next week, cued by a deepening trough sweeping from the Midwest to the Great Lakes. Temperature-wise, Pittsburgh is set to experience numbers dancing near seasonal standards throughout this period. For those navigating the skies, pilots and passengers alike can expect VFR to continue through the TAF period with high pressure, with only the anticipation of constraints linked to thunderstorms on Thursday to possibly stir the pot, according to the National Weather Service.
