A powerful upper level storm system along with a cold front will move across the area bring an early start to winter. Unseasonable below normal temperatures, snow, and gusty winds are forecast to impact the region starting as soon as Wednesday afternoon.
Already the National Weather Service in Rapid City has placed counties in western, South Dakota under a Winter Storm Watch starting Wednesday evening and continuing through Friday morning.
Ahead of this storm system, warm temperatures will be around for tomorrow before the cold front pushes into the state by Tuesday night and into Wednesday morning. Temperatures are forecast to be steady or slowly fall on Wednesday.
Precipitation will then develop in far northwest, South Dakota by Wednesday afternoon and become more widespread into Thursday. The precipitation is expected to change over to all snow by Wednesday night and at times become heavy. Heavy snowfall amounts of six inches or more are possible and becoming more likely.
Central and northeast regions of the state, rain will begin to push into the region by Wednesday night and spread more eastward by Thursday. Rain is expected to change over to snow for much of central, South Dakota by Thursday with some locations accumulating significant amounts of snow, possibly over six inches. The northeast, forecast are calling for a change over from rain to snow Thursday evening and into the overnight hours. By Friday night, most of the precipitation would have moved out into Minnesota.
For the southeast, rain or even an isolated thunderstorm will be likely by Wednesday night and carrying into Thursday morning. No severe thunderstorms are expected at this time. Later into the day on Thursday, light rain will be possible before the cold front pushes into the area, bring temperatures down. By late Thursday night and Friday, rain is forecast to change over to snow with snow amounts remaining light at this time.
Please keep checking back with DakotaRadar for the latest weather forecast and alerts. There remains some uncertainty in the track of this storm and the forecast for rain changing over to snow which impacts snowfall amounts.