***Increased severe weather threat for tomorrow afternoon into tomorrow night with downpours, frequent lightning, damaging winds, hail, and even a tornado or two all on the table, mainly for PA.***

From the Storm Prediction Center: As the front sags southward and destabilization maximizes through the afternoon, storm initiation along and just ahead of the front is expected. Storms may initially include cellular mode, especially from central Pennsylvania westward, but flow roughly parallel to the front should favor quick upscale/linear evolution. Still, weak veering and rapid strengthening of the flow with height will support organized storms -- including rotating updrafts within the line, and particularly with any storms which can remain at least transiently cellular. While the expected linear storm mode should help to limit tornado potential, a couple of tornadoes are anticipated, particularly across western and central Pennsylvania, where large hail may also occur. Otherwise, the primary severe risk across the region should be damaging wind gusts, aided by 40 to 50 knot westerlies extending as low as 900 mb per model point-forecast soundings.