@VictorVenema Ah yes, I've heard a bit about those issues, though this is my first time hearing of COSMO specifically. (It seems to be higher-resolution than what I deal with.) That said, I'm doing some work with a model that makes a lot of not-so-physically-robust assumptions myself, so I can't really cast judgement myself, haha.

The world of Arctic precipitation is fraught with uncertainty! It would be nice to get some more observations, but that's always the case for these things, it seems.

@VictorVenema Oh yeah, convection parameterization is a whole other can of worms! (One that I admittedly don't know as much about, it's a bit removed from my area, haha)

Nice to meet you! I prefer to stay pseudonymous here, so I go by "cryospheroid", but you can also call me A.C. I'm still a PhD student myself; I've done some work with comparing Arctic snowfall remote sensing & reanalyses, and I'm currently working on modelling snow-on-sea-ice (towards improving sea ice thickness estimates).

Always get a bit frustrated when people complain about how error-prone precipitation forecasts are. Cloud microphysics is difficult!