Residents of Pittsburgh can leave their umbrellas at home for at least another day as hot, dry conditions persist in the city, extending the dry spell to two solid weeks. According to the National Weather Service in Pittsburgh, under the influence of surface high pressure centered off the Mid-Atlantic coast, today's forecast suggests that temperatures will be a couple of notches above Sunday's, although heat index values are expected to linger below the 95-degree threshold. As the high-pressure system remains stationary, a diurnal cumulus layer is anticipated by the afternoon.
Looking ahead to Tuesday and Wednesday, only minimal chances for showers or thunderstorms are expected Tuesday afternoon, as a capping layer of warm air aloft will likely keep the lid on any significant weather activity for most of the day, but as the evening approaches a cold front advancing from the Midwest could potentially ruffle the tranquil weather pattern, according to forecasts. The National Weather Service predicts an uptick in shower and thunderstorm chances on Wednesday. However, the possibility of significant floods is low due to the dry conditions leading up to the potential storms—temperatures will remain in the upper 80s to low 90s through Tuesday, with the possibility for some storms to produce gusty winds or downbursts, but without the overlay of a significant flood risk.
As the week progresses, uncertainty arises regarding the lingering effects of the weak surface boundary and its movement. Thursday could see a few more showers and thunderstorms, particularly south of Interstate 80, as a secondary weak shortwave follows the exiting boundary. Still, by the evening, a shift toward drier conditions is forecasted. As we approach the weekend, a stronger ridge is expected to rebuild over the Eastern United States, heralding a return to the familiar pattern of dry and hot weather in the region, with temperatures forecasted to climb between five and ten degrees above average from Friday through the weekend.
For those who are frequent flyers or picking up loved ones from the airport, Pittsburgh's aviation report looks promising with continued VFR (Visual Flight Rules) conditions, including a few afternoon cumulus clouds between 5-7kft and low wind activity, as detailed by the National Weather Service's aviation outlook. It is only with the anticipated passage of the upper trough on Tuesday that pilots might contend with isolated convection leading to temporary restrictions in visibility, tied closely to the presence and localized intensity of storms.
