Atlantic Summary for September 2023
Monthly Summary

359 ABNT30 KNHC 011136 TWSAT Monthly Tropical Weather Summary NWS National Hurricane Center Miami FL 800 AM EDT Fri Sep 1 2023 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: Tropical cyclone activity in the Atlantic basin in August was above normal overall in terms of the number of named storms, hurricanes, and major hurricanes. In total, six named tropical cyclones formed in the basin in August, with two of those becoming major hurricanes. Based on a 30-year climatology (1991-2020), between 3-4 named storms typically develop in August, with 1-2 of them becoming hurricanes. A major hurricane typically forms in August every 1 to 2 years. Franklin initially made landfall in the Dominican Republic as a tropical storm, and later affected Bermuda with tropical storm conditions as it passed by to the north as a hurricane. Harold made landfall in south Texas as a tropical storm, and Idalia made landfall in the Florida Big Bend region as a major hurricane. In terms of Accumulated Cyclone Energy (ACE), which measures the strength and duration of tropical storms and hurricanes, activity in the basin so far in 2023 has been about 35 percent above average compared to the long-term (1991-2020) mean. Reports on individual cyclones, when completed, are available at the National Hurricane Center website at www.hurricanes.gov/data/tcr/index.php?season=2023&basin=atl Summary Table Name Dates Max Wind (mph) ----------------------------------------------------------- Unnamed STS 16-17 Jan 70* TS Arlene 1-3 Jun 40* TS Bret 19-24 Jun 70 TS Cindy 22-26 Jun 60* H Don 14-24 Jul 75 TS Emily 20-21 Aug 50 MH Franklin 20- Aug 150 TS Gert 19- 40 TS Harold 21-23 Aug 50 MH Idalia 26- Aug 130 TS Jose 29- Aug 60 ----------------------------------------------------------- * Denotes a storm for which the post-storm analysis is complete. $$ Hurricane Specialist Unit
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