3. Nor'easter -

Nor'easters thrive on the extreme temperature contrast between two air masses.

Some nor'easters undergo "bombogenesis" (becoming a " bomb cyclone "), where pressure drops at least 24 millibars in 24 hours, leading to rapid intensification. Core Characteristics What Is a Nor'easter? | NESDIS - NOAA 3. Nor'easter

The polar and tropical jet streams often merge, providing additional energy to the system. providing additional energy to the system.