2023 Atlantic hurricane season (Sandy156)

The 2023 Atlantic hurricane season was an slightly above average season featuring 15 named storms, 8 hurricanes, and 4 major hurricanes. The season officially started on June 1 and officially ended on November 30, although storms may form out of those boundaries, as demonstrated by Tropical Storm Arlene, which formed on February 20.

Subtropical Storm Arlene
An extratropical cyclone formed along a cold front early on February 18. Soon then that day, a low began to detach from the front, and acquired tropical storm force winds. On February 19, the system began to gradually develop, defining a center of circulation despite the high longitudes and cold waters. On February 20 at 2000 UTC, an Air Force Reconnaissance flight reported that the storm has a well-defined convention with winds reaching gale force, and thus it was classified as Subtropical Storm Arlene. However, Arlene remained a disorganized storm mainly due to moderate wind shear and cooler waters, peaking at 45 mph/998 mbar before weakening and becoming an extratropical cyclone the next day on February 21.

Storm names
The following list of names was used for named storms that formed in the North Atlantic in 2023. The names not retired from this list will be used again in the 2029 season. This was the same list used in the 2017 season, with the exception of the names Harold, Idalia, Margot, and Nigel, which replaced Harvey, Irma, Maria, and Nate respectively. All of those replacement names were used for the first time.