Undated (AP) Whether or not this year sets a record for tornadoes, the one's so far have been stronger and deadlier.
So far, 110 people have died and more than 20 tornadoes have been at the top end of the rating scale.
Just four years ago, the U.S. racked up more than 1,800 tornadoes during the course of the year. So far this year, there have been nearly 1,200.
While that number is likely to shrink when duplicate sightings are resolved, this year's twisters have been especially strong. For instance, last weekend's tornado in Parkersburg, Iowa, was an ef-5 storm, the most powerful on the scale, with winds above 200 miles
But why so many so early?
Experts can't say exactly, but if the number of storms continues at this pace, a new record will be set by year's end.