This Thursday morning (Christmas Eve) featured a widespread light to at-times moderate snow event across much of this six-county North Central Kansas area, all of which fell during the pre-dawn hours. While the majority of locations received between 1 and 2.5 inches, some places within Phillips and Smith counties reported locally higher totals of 3 -5, marking the biggest snowfall of the early winter season. According to a combination of CoCoRaHS and NWS cooperative observers, a few of the highest reports featured 5 at Phillipsburg and 3 at Smith Center and seven miles northwest of Lebanon. On the lower end of the spectrum, far southern and southeastern portions of the area, especially Mitchell County, saw little to no snow as slightly warmer air aloft allowed precipitation type to prevail as rain and possibly a brief period of sleet. All in all, this was a fairly low-impact event, especially given that winds averaged near-to-below 15 MPH and the snow was fairly wet in nature given surface temperatures a few degrees either side of freezing. In fact, many folks welcomed this snow as it set the stage for the first white Christmas parts of the area had seen in three years.
Timing-wise, this was clearly an overnight/early morning event for North Central Kansas. The first snowflakes pushed into Phillips and Rooks counties between 1-2 AM and the leading edge of steady precipitation reached Jewell and Mitchell counties between 3-4 AM. Snow fell for no more than 3-4 hours in most places, with the back edge pushing out of Jewell County to the northeast between 6-7 AM. In the mid to upper levels, this quick-hitting event was instigated by a rather low-amplitude shortwave trough tracking across Nebraska and northern Kansas, and embedded within a broad, larger-scale trough dominating the majority of the United States. Despite its fairly modest appearance in computer model data, this disturbance made the most of its mid-level isentropic lift and frontogenesis, resulting in slightly-higher-than-anticipated snow amounts in far North Central Kansas.