There is actually no special “mountain weather”. The weather in the mountains follows the same rules as the weather in the rest of the country. But the special conditions that exist in the mountains can make the weather erratic and unpredictable.
No where else is the weather so affected by nature. Mountains and valleys, large local elevation differences and other variations in the terrain impact winds, temperatures and precipitation. Eastern and western mountains can have completely different weather. But the weather differs the most between bare mountains above the tree line and lowland terrain.
This means that we often feel that the weather changes quickly in the mountains. But it is not always the weather that changes, rather we ourselves who move between different zones of weather, one could say. Here, you can also read more about avalanches and how we can now review forecasts of avalanche danger.