Current WPC rainfall forecast shows a rainfall event with an average recurrence interval of 10 years (i.e. this kind of rainfall event has 10% chance of occurring any given year). Their 90th percentile forecast includes an ARI of up to 100 years. Worth watching this closely. pic.twitter.com/Z0nZpDi54x

— Ryan Hanrahan (@ryanhanrahan) August 31, 2021