Oct 5, 2016

It’s not hype — Hurricane Matthew has been blasting through records

Haiti
by
Phil Klotzbach
,
Washington Post
Image: NASA
Image: NASA

Matthew reached hurricane intensity Sept. 29, and since then has been breaking records. Below are some of the milestones that Matthew has achieved so far:

  • Hurricane Matthew underwent a remarkable rapid intensification of 80 mph in 24 hours, intensifying from a Category 1 hurricane to a Category 5 hurricane. This was the third-strongest rapid intensification in a 24-hour period for any Atlantic hurricane on record, trailing only Hurricane Wilma (2005) and Hurricane Felix (2007).
  • It also became the first Atlantic-basin Category 5 hurricane since Felix (2007). Matthew is the 31st Atlantic-basin Category 5 hurricane on record.

One of the remarkable things about Matthew during its time in the eastern Caribbean (<=20°N, 75-60°W) was its very slow forward speed. Typically, hurricanes have to move at least 8 to 10 mph to not churn up cold water, which would significantly weaken the storm. But the Caribbean is very warm and very deep, which means there was less cold water to churn. As such, Matthew has been able to sustain itself as a very strong hurricane for a long time. Because of its slow movement and strong intensity, it has achieved several notable records for intensity and duration.

  • Hurricane Matthew is the longest-lived Category 4-5 hurricane in the eastern Caribbean on record.
  • The storm was a Category 4-5 hurricane for 102 hours, which is the longest that a hurricane has maintained such a strength on record during October in the Atlantic basin.
  • Matthew has been a major hurricane (Category 3-5) for more than five days, the longest-lived major hurricane since Hurricane Ivan (2004).

One index that hurricane scientists frequently use when they assess integrated effects of a hurricane is accumulated cyclone energy (ACE). This index takes into account intensity and duration of a hurricane.

  • Hurricane Matthew generated the most ACE of any hurricane in the eastern Caribbean on record.
  • As of Wednesday morning, Matthew had generated the most ACE by any single Atlantic hurricane since Igor (2010). Given the forecast track and intensity of Matthew, it is likely to be one of the highest-generating ACE storms of the past 50 years.

Matthew has already devastated portions of the Caribbean along its slow northward trek.  It made landfall as a Category 4 hurricane in Haiti and then in Cuba and is now currently bearing down on the Bahamas. As such, Matthew has set some notable landfall records as well.

  • It was the first Category 4 hurricane to make landfall in Haiti since Hurricane Cleo (1964).  Matthew was also only the third Category 4 hurricane to make landfall in Haiti on record, in addition to Flora (1963) and the aforementioned Cleo.
  • Hurricane Matthew was the first Category 4 hurricane to make landfall in Cuba since Hurricane Ike (2008)