Pittsburgh residents can expect a day of dry and overcast conditions today, with a chance of fog early in the morning, particularly north of the city, where freezing conditions have prompted advisories. The National Weather Service has indicated that the fog is expected to lift by mid-morning, allowing for seasonable temperatures throughout the day. According to the forecast, dry weather is expected to continue today under high pressure, with rain chances re-emerging early on Friday.
In the early hours, the combination of high pressure and stagnant air flow led to Dense and Freezing Fog Advisories issued for several Pennsylvania counties until 9 AM EST this morning. While roads might see a light glaze on surfaces, current predictions, as reported by the National Weather Service, indicate that these conditions will be short-lived. The low clouds, however, are set to stick around, thanks to a lingering moisture trapped beneath a stubborn atmospheric inversion.
Looking ahead to Friday and Saturday, those in Pittsburgh and southwards should keep umbrellas close, as the region will see widespread rain during the afternoon and evening. Rain returns on Friday, the weather service notes, with temperatures expected to be near or a slight bump above the seasonal average. The heaviest rainfall is predicted for areas along and south of the Interstate 70 corridor, effectively sparing northern zones from the brunt of the system's moisture.
As for the weekend, the rain is set to taper off by Saturday morning, allowing for a stretch of dry weather through Sunday. This respite is likely to be short-lived, with meteorologists already eyeing another potential disturbance that could bring unsettled conditions early in the following week. They've cautioned, however, that there is still too much uncertainty to begin narrowing down any specifics regarding the nature of this upcoming system, as to the type and amount of precipitation we could expect or the timing of its arrival.
For aviators, the forecast presents a tricky scenario, given the low confidence in how and when the low visibility and ceiling conditions will improve. Fog has caused IFR/LIFR situations across the area, especially at northern terminals like FKL/DUJ. Pilots are advised to keep abreast of the latest weather service updates as conditions evolve. Post-rain, improved VFR conditions are anticipated Sunday into early next week before the next system's arrival potentially alters the aviation landscape yet again.
In terms of ongoing advisories, residents should remain vigilant. Dense Fog Advisories until 9 AM EST have been announced for an array of counties in Pennsylvania, Ohio, and West Virginia, with warnings about potential visibility setbacks and hazardous driving conditions on bridges and overpasses.
