Cooperative Institute for Meteorological Satellite Studies / University of Wisconsin-Madison
Tropical Cyclones
AI Rapid Intensification Index   (Reference)

Go to: Atlantic TCs
Go to: East Pacific TCs
Go to: West Pacific TCs
Go to: Southern Hemisphere TCs

Atlantic TCs:

Eastern Pacific TCs:

Western Pacific TCs:

Twentyfour at 09/16/26 06 UTC. Intensity = 30 kts, MPI = 141 kts    

 

Twentyfour History

AI-RI Matrix of RI probabilities RIPA Matrix of RI probabilities
------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------
RI (kt / h) 20/12 25/24 30/24 35/24 40/24 45/36 55/36 55/48 70/48 65/72 RI (kt / h) 20/12 25/24 30/24 35/24 40/24 45/36 55/36 55/48 70/48 65/72
AI-RI 6.2% 30.8% 17.4% 15.6% 3.9% 32.6% 10.8% 21.8% 10.2% 27.1% RIPA Consensus 2.0% 25.4% 12.1% 9.5% 9.2% 36.4% 19.9% 46.1% 29.4% 60.8%
AI-RI in RIPA Consensus 3.3% 27.2% 13.9% 11.5% 7.3% 35.1% 16.8% 38.0% 23.0% 49.5% Linear Discriminant Analysis 1.1% 15.4% 7.1% 2.0% 1.3% 25.1% 14.7% 47.1% 26.8% 62.6%
Logistic Regression 2.8% 35.4% 17.2% 17.0% 17.0% 47.6% 25.0% 45.1% 32.0% 59.0%
------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------
current Twentyfour intensity image current Twentyfour intensity image
current Twentyfour microwave image

Southern Hemisphere TCs:

Last Updated: 20260916 at 1225 UTC

Past 2026 Atlantic TCs
Arthur
Bertha
Cristobal
Dolly
Edouard


Past 2026 E Pacific TCs
Lala
Moke
Amanda
Boris
Cristina
Douglas
Elida
Fausto
Genevieve
Hernan
Iselle
Julio
Karina
Lowell
Marie
Norbert
Fifteen


Past 2026 W Pacific TCs
wp012026
wp022026
wp032026
wp042026
wp052026
wp062026
wp072026
wp082026
wp092026
wp102026
wp112026
wp122026
wp132026
wp142026
wp152026
wp162026
wp172026
wp182026
wp192026
wp202026
wp212026
wp222026
wp232026


Past Southern Hemisphere TCs
sh012026
sh022026
sh032026
sh042026
sh052026
sh062026
sh072026
sh082026
sh092026
sh102026
sh112026
sh122026
sh132026
sh142026
sh152026
sh162026
sh172026
sh182026
sh192026
sh202026
sh212026
sh222026
sh232026
sh242026
sh252026
sh262026
sh272026
sh282026
sh292026
sh302026
sh312026