Satellite image of Hurricane Rafael, courtesy of NOAA
Here we are in the middle of October, well past the peak of the tropical storm season. Yet, the final advisory for Hurricane Rafael, the 17th named storm of the season, was just issued yesterday. The actual peak of the season happens on September 10th, and the season officially ends on November 30th, but the number of tropical cyclones rapidly declines after the September 10th peak. Here are some other interesting facts from the Atlantic Basin:
1.There are more storms beginning with the letters "I" and "C" that have been retired than any other letter. Since 1954, when the naming convention became official, 9 "I" and "C" named storms have been retired. Of course, 2011's Irene is one of these retired names.
2.In the entire 68-year history of named tropical storms, only one name- Allison- was retired without the storm ever reaching hurricane status. Despite the lack of wind, experts decided to retire Allison because of the devastating floods that it caused, especially in the Houston metro area, in 2001.
Hurricane return rate along the East Coast and
Gulf Coast of the USA, courtesy of NOAA
DC Hurricane climatology: The abovemap shows the Return Period for hurricanes in the Atlantic Basin. The Return Period is the average number of years in between hurricane landfalls in a particular area, and as youcan see, we haveat least 12 years on average between landfalls in our area.In the immediate DC Metro, it's extremely rare to get winds of 74mph or greaterfrom a hurricane itself. The Chesapeake Bay and the DelMarVa peninsula help insulate us; even with our proximity to the Chesapeake, we really can't consider Washington to be a coastal city because we are not right along the ocean. Once hurricanes make landfall, they lose their windspeed rapidly, and the worst of the wind is removed from a storm while it's over the DelMarVa. The Beltway can be thankful for this barrier of protection from tropical systems!