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A fairly large, robust Euxoa (wingspan approx. 4 cm). Forewing variable, pale grey, yellow-buff or dull pink (all Alberta specimens seen are of the pink form). Markings light to obsolete, and consist of a lightly marked antemdian and postmedian lines in some specimens. The reniform and orbicular mostly obsolete, or lightly marked with pale scales, except for a patch of grey scales marking the lower end of the reniform. Hindwing shining white in males, dusted with grey in females. The pink form of Euxoa siccata is very similar, but has the entire reniform and small orbicular filled with dark scales.

Southern Manitoba and central Wisconsin, west to southwest Alberta and California; north to southern Alberta and south to south-central Mexico. In Alberta medialis has been collected in the dry grasslands and badlands north to Tolman Bridge Recreation area and west to the foothills near Cowley.