Severe thunderstorms moved east and southeast along a developing warm front that tracked through the region. Area soundings were helpful in anticipating the convective mode, as modest instability and shear were present. Scattered reports of large hail and damaging winds were reported.
Above: Heights and winds at 500 hPa at 12Z 8 June. Note the upper ridge building into the northeastern U.S. implying warm air building into the northeastern U.S.
Above: Radar reflectivity loop showing the development and movement of the convection (left), and image from the State College, PA radar showing the height of the reflectivity above 57,000 feet, which is unusually high for a thunderstorm top.
Above: Loop of surface maps, showing the developing warm front tracking through the area.
Above: Severe weather reports for 8 June.