Final Call Snowfall Forecast for Wednesday's Elevation-Dependent Snow -

A March daytime snow event with marginal temperatures and a warm ground is the perfect recipe for elevation-dependent snowfall here in Pennsylvania. As a result, higher elevations are likely to see twice the amount of snow as neighboring valleys. This is not our last shot, as we are watching Saturday for probably some interior snowfall. For now, let’s get into timing and amounts for Wednesday’s event.

TIMING

Precipitation will move in to the area in the pre-dawn hours from southwest to northeast. In many valleys, it may begin as rain before evaporation cooling takes place as heavier precipitation occurs, changing the rain to snow. However, all of the Pittsburgh Area and much of the Philadelphia Area will be all rain. Moderate snow will continue through the morning, especially in the higher elevations. Low elevations (below 700′) in the southern tier may have a tough time changing to accumulating snowfall. Precipitation will continue into the early afternoon before lifting out in the mid to late afternoon. Overall, roads should be mainly wet below 1000′ elevation. Below is future radar from the Hi-Res NAM for this event.