Event Summary

A stationary front was situated just west of the Lower Hudson Valley and Southern New England on August 21st. The air mass to the east of this front was very moist and unstable, with surface dew points in the lower 70s. Showers and thunderstorms developed near the front and moved east during the afternoon and evening hours. In addition to the moist atmosphere, wind speeds aloft were quite strong, which aided in the development of a few severe thunderstorms across the region. Golf ball size hail was observed in Rego Park.