https://noaanhc.wordpress.com/2023/06/1 ... dvisories/
Interesting tidbits:
- Of the 30 PTCs in the two basins, only three failed to develop into a tropical cyclone (Ten 2017, Seventeen-E 2019, Four 2022)
- Even though there's no requirement for 2-day and 5-day formation chances for starting PTC advisories, in practice, all advisories so far had at least 70% 2-day chance when designated PTC, with most over 80%
- 20% of PTCs were already at tropical storm intensity for the first advisory
- There have been 5 hurricane watches issued for systems that are still PTCs
- Most PTCs take around 20 hours for genesis, but Alex and Bonnie 2022 took 57 and 88 hours, respectively
- The PTC designation provides an average of 21 hours of extra lead time for issuing watches and warnings, compared to if PTC did not exist (Isaias had 36 hours of extra lead time)