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2023 Monthly Tropical Cyclone Summary

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Summary for the 2023 season though :

ABNT30 KNHC 011137

Monthly Tropical Weather Summary
NWS National Hurricane Center Miami FL
800 AM EDT Sun Oct 1 2023

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Tropical cyclone activity in the Atlantic basin was generally above 
normal in September with the formation of seven named storms, with  
three of those becoming hurricanes, and one becoming a major 
hurricane (Lee). In addition, Tropical Storms Gert and Jose and 
Hurricane Franklin all completed their life cycle early in 
September. Based on a 30-year climatology (1991-2020), between 4-5 
named storms typically develop in September, with three of them 
becoming hurricanes, and one of those becoming a major hurricane. 

Lee became a category 5 hurricane in the central tropical Atlantic 
and later on its large wind field affected portions of coastal New 
England in the United States, and Nova Scotia and New Brunswick in 
Canada as the hurricane became post-tropical. Later in the month, 
Ophelia made landfall in North Carolina as a strong tropical storm. 

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 33 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

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- 1 Sep                150
TS Gert                 19- 4 Sep                 60
TS Harold               21-23 Aug                 50
MH Idalia               26-31 Aug                130
TS Jose             29 Aug- 1 Sep                 60
TS Katia                 1- 4 Sep                 60
MH Lee                 5-16 Sep                165
H  Margot                7-17 Sep                 90
H  Nigel                15-22 Sep                100
TS Ophelia              21-24 Sep                 70
TS Philippe             23-   Sep                 50
TS Rina                 28-   Sep                 50

* Denotes a storm for which the post-storm analysis is complete.

Hurricane Specialist Unit

Graphic not available for the 2023 Atlantic season through September.