The Pittsburgh area woke up to a wintry scene Tuesday as snow showers persisted, particularly affecting regions along and north of Interstate 80 with bouts of lake effect snow creating localized substantial accumulations. According to the National Weather Service Pittsburgh PA, the snow was expected to wane over the course of the afternoon, providing some respite to residents after a morning of travel disruptions and brisk conditions.
Lake-effect snow, a phenomenon common to the area, was in full force, producing significant snow accumulation north of I-80, with highly localized 8-10 reports, as per the National Weather Service forecast. The affected areas included the ridges with upslope flow and the I-80 corridor, with amounts elsewhere north of I-80 in the 2-4 range. Southern regions fared better, seeing mostly minor accumulations on grassy and elevated surfaces.
Road conditions remained a concern as gusty winds accompanied the snowfall, creating a challenge for commuters dealing with snow-covered roads and reduced visibility. The weather service reported a tight pressure gradient and 25-35 knot low-level flow, which contributed to the wintry mix of gusty winds and low wind chill values, making it feel like the low teens to high single digits in some parts of the region.
Looking ahead, Wednesday is set to ring in additional rain and snow showers due to another disturbance. However, the likelihood for significant accumulation appears low, with the National Weather Service stating that the NBM probability for >1" is low in our area (<20%). This change signals a trend towards more marginal surface temperatures and a wind chill impact lessened by gradually moderating temperatures.
The long-term forecast offers a light at the end of the tunnel, indicating drier weather with temperatures trending upward by the weekend. Despite this slight reprieve, unsettled weather may return by early next week, suggesting that residents should keep their winter gear handy. As the situation continues to develop, air travel might see restriction potentials midweek, particularly to the north of Pittsburgh, but improving conditions are anticipated to round off the week under high pressure.
