I've made some research.
The next image shows the location of your screenshot as a red spot, on google earth (left):
On the right I've located (more or less) the same place on the map used as base in DynEnv.
As you can see those coordinates are laying in an area where blue and cyan pixels have been blended for rendering a climate of transition between subartic and cold temperate (Polar_A and Temperate respectively in our cfg files). In such areas conditions may vary depending on were exactly (wich pixel of the map) you are located. In this particular case it means that that both snowy or not snowy land could be possible outputs because, due to our season settings, april is still winter for subpolar climate, and spring for cold temperate climate (look at my seasons chart).
On the other hand, on google earth's map I've highlighted in yellow the position of Kiruna, the northernmost city of Norwey, not too far from the coordinates you gave me, but in inland. According to wikipedia, its
daily mean temperature for the month of april is slightly under 0°C (-3.2°C). I am coming from an hot place, so I am no an expert on that matter, but I think that under these temperatures it may or may not snow, especially toward the cost of northern Norwey, where the North Atlantic Current is mitigating the climate. By the way: is there any Norwegian SH5 player here that can confirm or disconfirm my assumptions?
Anyway this is not exactly our point: we want to demonstrate that DynEnv is (or maybe is not) messing up land seasons. The location we chose is not the best one for our case study, because of the mixed pixels method that I was talking about before, and because the month of the historical mission we are using for test. Before sailing to another place I would like to ask you to visit the same location in campaign between december and february, or to load once more the same mission after installing this patch:
http://www.mediafire.com/?kzcc2t6g7wnpqfp
enable it after Dynamic Environment Base Mod, any version. In both cases it should be snowy, or at least I hope so...
