Original sentence: Also, dirty snow left over from plowing operations.Snirt — Snirt is an informal term for snow covered with dirt, especially where strong winds pick up topsoil from uncovered farm fields and blow it into nearby towns where the melt rate is slower
Edited sentence: Also, snow that is dirty, often seen by the side of roads and parking lots near areas that have been plowed.Snirt — Snirt is an informal term for snow covered with dirt, which occurs most often in spring, in Prairie States like North Dakota, where strong winds pick up black topsoil from uncovered farm fields and blow it into nearby towns where the melt rate is slower.The phenomenon is almost magical; one goes to sleep with white snow outside and awakens to black snow