Maine averages just 2 tornadoes per year. The state's northern latitude, mountain terrain, and Atlantic Ocean influence combine to suppress most tornado formation. Maine tornadoes are typically weak (EF0-EF1) and short-lived.
Far from warm moist air sources.
Mountain terrain suppresses tornado formation.
Cool coastal air limits convection.
Short warm season limits severe weather potential.
Portland area. Occasional events.
Augusta, Bangor. Rare tornadoes.
Aroostook County. Very rare.