A 10k waterproof jacket the fabric provides good protection during not prolonged weather conditions. It can give in under sustained pressure in some local areas, for example, under the backpack straps. 
Condition: moderate rain, average snow, light pressure.

Browse through some others models of jackets with such waterproofness rating and compare their pros and cons: 10k waterproof jackets.

10k waterproof, other factors to consider

While choosing your next 10k waterproof jacket, consider also seams, flaps and zips… because they may let the water in.

Water column only refers to the fabric itself. There are a number of other factors that influence the protective function of a jacket as a whole.
If a front zip is of a low quality, for example, it may let water into the jacket, particularly in a strong headwind. Poorly-designed hoods are another factor that should not be ignored.