The Welcome series consists of deep, well drained soils formed in volcanic ash and colluvium and slope alluvium from sandstone modified slightly by glacial till. Welcome soils are on glacially modified mountain ridges and shoulder slopes and have slopes of 5 to 60 percent. The soil moisture control section is dry in all parts for 45 to 60 consecutive days within the four months that follow the summer solstice in 6 or more years out of 10.
Reaction is strongly acid or moderately acid throughout.
Some pedons have an A horizon. It has 25 to 65 percent weathered rock fragments and 0 to 10 percent hard rock fragments. It is loam or silt loam. It has 25 to 65 percent weathered rock fragments, and 0 to 10 percent hard coarse fragments. It is sandy loam or fine sandy loam.