CAE certainly appeared to be affected by an HSLC event Monday evening. A line of convection developed to our west and pushed into our forecast area just prior to 00z/0301 with what looked like a classic broken-S signature along the line as it pushed across Newberry County, SC. The environment over our forecast area based on SPC mesoanalysis showed SBCAPE values less than 200 J/kg, MLCAPE around 250 J/kg, MUCAPE around 500 J/kg, with 0-6km Shear values of 60-80 knots and 0-1km Shear around 40 knots.
We received numerous reports of wind damage across the forecast area and a couple of reports of a tornado in the Silverstreet area. A storm survey revealed EF1 damage just north of Silverstreet with classic microburst damage in the town of Silverstreet. I was working the radar during the event and it was very interesting to see that there were two main broken-S signatures along the line, the one in Newberry and another that developed later to the north across our northern counties, which did not produce any tornado damage. The signature that moved through Newberry and “broke” then became linear again as it went through Columbia and then again became a broken-S as it moved through Sumter County which also did not produce any tornado damage and not even any wind damage reports that we could find. I have attached a few radar images from GR2 Analyst.
The office writeup of this event can be found here.