The strongest storms formed generally along and east of the I-77 corridor as they moved east into PA by the evening hours. The SPC increased a portion of our area under an enhanced risk at the 1230 PM update. Thursday, August 12 had two main rounds of severe convection one in the morning and one in the afternoon. The lakeshore areas were hit particularly hard with widespread tree damage noted.
The convection in the afternoon proved to be the most widespread and strongest, with NWS CLE issuing our first 80 mph WEA-generated severe thunderstorm warning since implementation this year which was credited to saving at least one person’s life. The Storm Prediction Center (SPC) increased a portion of our area under an enhanced risk at the 1230 PM update. Wednesday, August 11 was characterized by having two main rounds of severe convection one in the morning and one in the afternoon.
Deep layer shear was relatively weak through all three days, though modest mid-level flow around 35 to 40 knots helped to sustain generally multi-cell and cold pool-driven convection, along with nocturnal mesoscale convective systems, which helped to provide surface lifting mechanisms and enhanced low to mid-level shear profiles. Multiple rounds of strong to severe thunderstorms moved across the area Wednesday morning into Friday, with portions of the region outlooked in a SPC Enhanced Risk for two out of the three days, mainly for a damaging wind threat, though a few instances of large hail did occur, given the large instability in the hail growth zone (-10C to -30C layer). A warm and moist air mass set up across the region, characterized by dew points in the lower to mid-70s and instability parameters in the moderate to strong range.
0 kommentar(er)
