Winter was slow to loosen its grip on North Central Kansas in 2013, as one of the top-5 coldest months of April on record featured a late-season snowfall of 1-4 inches that mainly fell between the late evening of Monday the 22nd and sunrise on Tuesday the 23rd. Although flurries or very light accumulating snow continued into the daytime hours for parts of the six-county area, the bulk of this event occurred overnight. The overall-highest accumulations fell under east-west oriented bands that targeted Rooks, Osborne and Mitchell counties, where NWS cooperative observers and CoCoRaHS observers reported amounts as high as 4 at Natoma and near Covert, 3.5 ten miles south of Alton, 3.4 four miles west-northwest of Plainville and 3 five miles south-southwest of Scottsville. Accompanying this primarily nocturnal snow event was a sustained north wind of 15-25 MPH with occasional higher gusts in the wake of a sharp cold front. Temperature-wise, readings hovered around 30 degrees as snow accumulated. Unseasonably cold readings persisted right on through the day of the 23rd, as most of North Central Kansas only attained highs in the mid-upper 30s. However, this snow did not stick around for long, as readings quickly rebounded to around 60 degrees the following day.
In the mid and upper levels, forcing was instigated by a pronounced east-west zone of mid level frontogenesis residing underneath a stout upper level jet extending eastward from a large-scale, positively-tilted trough centered along an axis from south central Canada to the Central Rockies. At the surface, overnight analysis confirmed that North Central Kansas was positioned well north of a strong cold front aligned from west Texas to western Illinois, with local temperatures hovering around 30 degrees.