(4/6) In quiet years in the NH stratosphere w/o a #SSW, earlier dynamic final warmings are more likely than late FWs. @Domeisen_D and I found that the median final warming date at 10hPa for winters w/o SSW is April 1st, but with SSWs it’s April 24.https://t.co/TRjjU3whhU

— Dr. Amy H Butler (@DrAHButler) February 27, 2022