000
ABNT30 KNHC 011258
TWSAT
Monthly Tropical Weather Summary
NWS National Hurricane Center Miami FL
800 AM EST Fri Dec 1 2023
For the North Atlantic...Caribbean Sea and the Gulf of Mexico:
No tropical cyclones formed in the Atlantic basin in the month of
November. Based on a 30-year climatology (1991-2020), a tropical
storm forms in November once every year or two, and a hurricane
forms once every two years. A disturbance (Potential Tropical
Cyclone Twenty-Two) caused heavy rains and flooding across portions
of Jamaica, eastern Cuba, and Hispaniola during the middle part of
the month, but the system did not become a tropical cyclone.
Overall, the 2023 Atlantic hurricane season had above-normal
activity in terms of the number of named storms but a normal amount
of activity in terms of the number of hurricanes and major
hurricanes. In 2023, 20 storms of at least tropical storm strength
formed, of which 7 became hurricanes and 3 became major hurricanes
(category 3 or higher on the Saffir-Simpson Hurricane Wind Scale).
This compares to the long-term (1991-2020) averages of 14 named
storms, 7 hurricanes, and 3 major hurricanes. In terms of
Accumulated Cyclone Energy (ACE), which measures the strength and
duration of tropical storms and hurricanes, activity in the basin
in 2023 was about 20 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- 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 22-24 Sep 70
TS Philippe 23 Sep- 6 Oct 50
TS Rina 28 Sep- 1 Oct 50*
TS Sean 11-15 Oct 45
H Tammy 18-29 Oct 105
TD Twenty-One 23-24 Oct 30
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* Denotes a storm for which the post-storm analysis is complete.
$$
Hurricane Specialist Unit