Snow section, pg 36 What I have so far.
Snow rules pg 60
Wind pg 61
Extreme Temps pg 62
Blizzard: PSR modifiers should be +2 Mechs. +1 for Heavy Snowfall and +1 for Strong Gale. ToHit should be +1 +2DB, +3Mi. As stated above this could just be for space reasons, not sure. The other modifiers appear to be correct
Heavy Snowfall: As calculated vehicles should be -2, Infantry should be -2G(B)/-2(CI).Temp is -50 with no wind.
Ice Storm: Includes -60 degree temps, Moderate Gale. Infantry column should be -3G(B)/-4(CI). I calculate this as -3 Extreme Temp and -1(CI) from Moderate Gale.
Have skimmed over the other weather and so far appears correct
The following is from the 3.5 errata pdf but unless there are other calculations that did not get added in later sections I don't see how the results were obtained.
4) Under “Heavy Snowfall”, “MP Cost per Hex or Movement Modifiers”
a) Change the Vehicles column from “+0” to “–4 C”
b) Change the Infantry column from “+0” to “–2 G (B)/–3 (CI)”