Hurricane Laura blew up quickly as it headed for the Louisiana coast, intensifying from a tropical storm to a major hurricane in less than 24 hours. By the time it made it landfall, it was a powerful Category 4 hurricane with 150 mile-per-hour winds. The Atlantic has seen several hurricanes rapidly intensify like this in recent years.
In 2018, Hurricane Michael unexpectedly jumped from Category 2 to Category 5 in the span of a day before hitting the Florida Panhandle. Hurricanes Harvey, Irma and Maria in 2017 also met the definition of rapid intensification: an increase of at least 35 miles per hour in a 24-hour period. Based on preliminary reports from the National Hurricane Center, Laura gained 65 mph in one 24-hour period and, more impressively, added 80 mph from Aug. 25 to Aug. 27. But do all these fast-growing, powerful storms in recent years mean rapid intensification is becoming more common?
With information about hurricanes coming through social media and phone apps, that’s a question hurricane scientists like myself are hearing a lot. It’s useful to consider a few things: the history of U.S. hurricanes, why the Atlantic is currently so active, and the ingredients that allow storms to strengthen so quickly.
Continue reading at Colorado State University
Image via Colorado State University