Posts

Showing posts from May, 2022

A low precipitation supercell spins in the sky above Texas in 2015

scientists have seen “a geographical shift of the nucleus (central impact location) towards the southeast United States. This spatial shift is also accompanied by reduced spatial variance, suggesting LTOs (large tornado outbreaks) have become less dispersed (or more localized) in the recent period.” The findings also report that the frequency over a data collection period between 1950-2019 display less frequency of large tornado outbreaks and reports. “The arrival rate has changed from 124 days during 1950–1980 to 164 days during 1977–2007 and remained relatively constant during later periods, indicating that LTOs are becoming less frequent,” the report stated. What is still unclear is whether there is direct correlation to the jet stream pattern changing and what’s happening at the surface in Tornado Alley. The data supports fewer days with tornadoes, but more days with 30 or more tornadoes. It also appears that more tornadoes are occurring in the deep south, which includes Mississip