Sentences with phrase «shows tornado outbreaks»

And new research shows tornado outbreaks are getting more dangerous: More tornadoes are hitting during each round, even though the overall annual number of American twisters hasn't changed.

Not exact matches

Last spring a research team led by Michael Tippett, associate professor of applied physics and applied mathematics at Columbia Engineering, published a study showing that the average number of tornadoes during outbreaks — large - scale weather events that can last one to three days and span huge regions — has risen since 1954.

In addition to a shift in the peak of tornado season, research has also shown that major outbreaks of tornadoes are becoming more common and that more tornadoes are occurring on those days.

[1:27 p.m. Updated A reader, Brad Barrett, pointed out that the word «unknowable» in my headline clashes with the greatly increased skill forecasters have shown in identifying zones ripe for outbreaks of powerful tornadoes, and he's right.

A preliminary National Weather Service evaluation of climate variables known to cause tornadoes in the Southeast doesn't show a global warming - related trend that can be linked to the severe outbreak.