More info here, note also that the medium-range ensemble is run at 9km resolution while the extended-range is 36km (both 137 levels). More ens members or higher horizontal resolution more important for this case? Let's see https://t.co/RxzX8RcW4s https://t.co/snRSPTV7q4

— Dr Simon Lee (@SimonLeeWx) December 27, 2023