Special Weather Statement issued August 15 at 5:39PM EDT by NWS

…A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN CLINTON… NORTHEASTERN ESSEX…NORTHWESTERN ADDISON…SOUTHWESTERN GRAND ISLE…CHITTENDEN AND NORTHWESTERN WASHINGTON COUNTIES… At 539 PM EDT, radar indicated strong thunderstorms were located along a line extending from near Port Kent to near Au Sable Forks. Movement was southeast at 25 mph.

Source: National Weather Service Alerts for Vermont