There will be a smattering of light snow showers over the western Dakotas, Montana and Wyoming through the 14th of March... with mixed rain and snow over western and central Nebraska. Temperatures will undulate, as they usually do at this time of year, swinging up into thr 50s and 60s around the 10th - but otherwise holding mainly in the 30s and 40s.
A storm system blows in off the Pacific Ocean, reaching Wyoming and Montana on the 14th and spreading across North Dakota, South Dakota and Nebraska on the 15th and 16th. This system will be capable of pumping out at least a foot of snow across portions of eastern Wyoming, eastern Montana and western South Dakota.
Another strong storm system will hit the area around March 19 with heavy snow, sleet and a risk of freezing rain.
A lot of very cold, sub-zero air lingers over northern Canada, the Arctic region and Alaska. Son't look for an early Spring at this point.