Season Summary
During the 2009 season, nine of the eleven tropical cyclones affected land, of which five actually made landfall. The United States experienced one of its quietest years, with no hurricanes making landfall in the country. Throughout the basin, six people were killed in tropical cyclone-related incidents and total losses reached roughly $77 million. Most of the damage resulted from Hurricane Bill, which caused severe beach erosion throughout the east coast of the United States. In the United States, tropical cyclones killed six people and caused roughly $50 million in damage. In the Lesser Antilles, Tropical Storms Ana and Erika brought moderate rainfall to several islands but resulted in little damage. Elsewhere in the Atlantic, the Azores Islands, Atlantic Canada, Bermuda, Cape Verde Islands and Wales were affected by tropical cyclones or their remnants. In Canada, Hurricane Bill produced widespread moderate rainfall in Nova Scotia and Newfoundland, leaving roughly $10 million in losses. The hurricane also produced tropical storm-force winds in Bermuda. Hurricane Fred briefly impacted the southern Cape Verde Islands as it bypassed the islands early in its existence. The Azores and Wales were also affected by Tropical Storm Grace; however, both areas recorded only minor effects.
Overall, the season's activity was reflected with a low cumulative accumulated cyclone energy (ACE) rating of 53, the lowest since 1997. Due to the low number of storms in the 2009 season, many of which were short-lived, the overall ACE value was ranked as below-average, totaling under 66. Hurricane Bill was responsible for the ACE value for August being 30% above average. ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. ACE is only calculated for full advisories on tropical systems at or exceeding 34 knots (39 mph, 63 km/h) or tropical storm strength. Subtropical cyclones are excluded from the total.
Read more about this topic: 2009 Atlantic Hurricane Season
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