Unstable weather patterns are set to cast a shadow over Pittsburgh this weekend, with the National Weather Service in Pittsburgh predicting periodic showers and potential thunderstorms, some of which could bear severe consequences. According to the Area Forecast Discussion, a stationary front lingering across the region is expected to incite these adverse weather conditions throughout today and tonight.
Pittsburgh residents should prepare for "additional rounds of showers and thunderstorms today," the National Weather Service advised, warning of a "Marginal Risk for severe storms this afternoon" and the possibility of "locally heavy rainfall." Showers and isolated thunderstorms were already developing across Ohio early this morning, with one shortwave projected to surge across the area, suggesting increased precipitation.
The weekend forecast doesn't promise much respite. The service relayed how a surface wave anticipated to track across the Upper Ohio Valley later in the afternoon could potentially amplify the showers and storms. There is also a note of damaging wind potential as the flow aloft increases, with 0-6km values ranging around 30- 40kt, which may lead to more organized storms.
As the evening approaches, although the threat of severe weather may wane due to diminished surface-based instability, the "marginal risk for severe storms" remains in effect for early evening, according to the National Weather Service. Traces of elevated instability could still foster a handful of storms throughout the night. Despite the forecast, storm motion should be brisker than days prior, mitigating the risks of flash flooding, yet not nullifying it entirely.
Looking ahead to next week does not promise clearer skies either. A series of disturbances is slated to persist until Tuesday, with a slight reprieve expected midweek. The weather service projects that dry and less humid weather will return on Wednesday and Thursday, offering some relief from the tumultuous climate that has been hanging over the city.
Air travelers should also brace for impact, as the anticipated showers and thunderstorms prompt aviation advisories. The first wave of showers and isolated thunderstorms is crossing the area this morning, leading to speedy drops in visibility down to MVFR/IFR levels. Continual weather disturbances through Tuesday could keep up these challenging conditions for air traffic.
No watches or warnings are currently in place for Pennsylvania, Ohio, or West Virginia. Still, residents and travelers alike should stay alert and keep abreast of any updates on the evolving weather scenario.
