HurricaneEdouard wrote:Not sure if it's been posted here before, but thought some might like to read this unofficial reanalysis of the most powerful tropical cyclones, using the most up-to-date (as of 2017) version of the Advanced Dvorak Technique (unlike previous unofficial reanalyses, which either compared apples-to-apples but used older versions that no longer allow for comparisons to Patricia or Haiyan, or simply compared apples-to-oranges), as well as compensating for several biases (such as latitude and eye size): https://journals.ametsoc.org/mwr/article/145/3/971/103374/Reprocessing-the-Most-Intense-Historical-Tropical Click on the PDF button to read the whole thing!
The reanalysis' final calibrated ADT rankings:
1 Patricia (2015) 8.4 182 876
2 Haiyan (2013) 8.2 176 878
3 Tip (1979) 8.1 173 873
3 Gay (1992) 8.1 173 883
5 Gilbert (1988) 8.0 170 887
5 Yuri (1991) 8.0 170 887
5 Nida (2009) 8.0 170 892
8 Linda (1997) 7.9 167 884
8 Allen (1980) 7.9 167 886
8 Vanessa (1984) 7.9 167 886
8 Wilma (2005) 7.9 167 888
8 Angela (1995) 7.9 167 889
Note that this reanalysis retains Tip as having the lowest minimum pressure (although it underestimates it by 3mb), although Patricia and Haiyan beat it for windspeed! I am faintly thrilled Gilbert was analysed so high; I always thought Gilbert peaked in between recon passes (888mb, 889mb six hours later) - the original 885mb the NHC scrapped in post-season analysis was probably closer to its true peak - and always thought its satellite presentation was the most beautiful and powerful-looking I'd ever seen, alongside Haiyan and Tip. Nice to know there's an objective satellite analysis to support that subjective observation!
As for Gilbert, years ago Dr. Jeff Masters wrote an article documenting his experience of the recon mission during peak intensity. The plane at the time did not carry any dropsonde so that pressure readings were only extrapolated from flight level. Operationally, the NHC reportedly said they couldn't believe their numbers which had been as low as 879mb. Later study determined the actual lowest pressure in Gilbert was 888mb, but that still leaves some wiggle room for debate since there was no ground truth to the measurement.
https://www.wunderground.com/blog/JeffM ... ars-l.html
To this day, Gilbert remains the most impressive Atlantic hurricane in the satellite era and the only one to receive a T8.0 on subjective Dvorak. Its measured flight level wind of 173kt is also the highest in the Atlantic and the second highest overall in the WHEM only behind Patricia. I have no doubt that we would see 165kt+ SFMR measurements in Gilbert had the instrument available back then.