Washington, Nov 6 : A new study has determined that tornadoes that occur from midnight to dawn are 2.5 times more likely to prove fatal than twisters in the daytime.
The study, by scientists from the Northern Illinois University, also suggests that warning systems that have led to overall declines in tornado death rates might not be adequate for overnight events.
Nighttime tornadoes occur most frequently in the mid-South region of the United States.
Over the past century, the tornado death rate has declined, in large part because of sophisticated forecasting technology and warning systems.