has
decreased in winter, but no significant change in annual mean precipitation potentially because of very slight increases in spring and fall precipitation; precipitation is
projected to increase across Montana, primarily in spring; slight
decrease in summer precipitation;
variability of precipitation year - to - year
projected to increase
However, internal climate
variability creates irreducible uncertainty in the
projected future trends in snow resource potential, with about 90 % of snow - sensitive basins showing potential for either increases or
decreases over the near - term decades.