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Tropical Cyclone Topics

Taking a Look Back at the 2018 Atlantic Hurricane Season (Credit: NOAA NWS National Hurricane Center, NWS Key West)

11/30/2018

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Discussion: As November comes to a close, so does the 2018 Atlantic Hurricane Season.  This season produced fifteen named storms. Among those fifteen storms, eight of them were hurricanes.  This hurricane season produced two major hurricanes out of the eight that formed. A major hurricane is defined as a category three or higher on the Saffir-Simpson wind scale. The Saffir-Simpson wind scale measures a hurricane’s sustained wind speed. 
This Hurricane season will be remembered in particular for Hurricanes Florence and Michael that caused significant damage to the southeastern United States. Hurricane Florence was one of two major hurricanes this season. It formed on August 31st, 2018 and as it made its way across the Atlantic it strengthened into a category 4 hurricane with sustained winds of 130 miles per hour. It maintained its strength until the track took the storm into an area of wind shear. Wind shear can tear apart the hurricane causing the structure to become asymmetrical and weaken. Florence made landfall in North Carolina on as a category one hurricane and moved slowly over the Carolinas producing torrential rainfall and devastating flooding. Many rivers across the Carolinas came close or actually broke their rainfall records. It took many weeks and in some places a month for the waters to recede and the rivers to fall below flood stages. 

Hurricane Michael was the second of two major hurricanes this season. It formed in the Caribbean Sea on October 2nd, 2018 and traveled slowly through the Gulf of Mexico.  Once in the Gulf of Mexico, it rapidly intensified and became a major hurricane on October 9th, 2018.  Hurricane Michael reached a peak intensity of a high-end category four hurricanes with maximum sustained winds of 155 miles per hour. On October 10th, 2018, Hurricane Michael made landfall on the Florida panhandle near Mexico Beach, Florida. Michael caused widespread damage across the panhandle with a fourteen-foot storm surge that washed houses away and strong winds that destroyed buildings and foundations. Michael was the fourth strongest storm to make landfall in Florida since Hurricane Andrew in 1992 in regard to its wind speed. It was also the third strongest hurricane in regard to its central pressure with a minimum central pressure of 919 millibars to make landfall since Hurricane Camille in 1969. 

Overall this Hurricane season was pretty active this year. Tropical Storm Alberto kicked the season off early on May 25th, 2018 making landfall in Florida. Seven of the fifteen named storms were subtropical at a point in their lifetime.  A named storm that has characteristics of a non-tropical storm is called a sub-tropical storm. These seven storms this season all became tropical storms and three of them intensified to hurricane status.  For the first time since 2008, the Atlantic saw four named storms existing in the Atlantic basin together. Florence, Helene, Isaac, and Joyce all co-existed for a period of time this season. With the 2018 Hurricane season finished, it is never too early to begin making preparations for next summer. It’s important to have a plan in place if you live in hurricane-prone areas because it only takes one storm to cause significant damage. Being prepared and tuned into your local and government weather service offices is a great way to be ready for the 2019 season!  
​For more information on having a hurricane ready plan click here!
To learn more about other tropical cyclone stories from around the world, be sure to click here!
© 2018 Meteorologist Shannon Scully
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