Initially, temperatures are warm with the local weather station reporting a reading of 78F, with light winds out of the south.

Initially, temperatures are warm with the local weather station reporting a reading of 78F, with light winds out of the south. One hour later, a line of thunderstorms pushes through with heavy rain and strong winds. Shortly after, the sky begins clearing following with strong winds out of the northwest coinciding with a rapid decrease in temperatures, which is reported at 46F. What kind of frontal boundary did you just experience?