SOUTH DAKOTA - Already ahead of the storm system, the National Weather Service has placed counties in western, South Dakota under Winter Storm Watches and Winter Weather Advisories.
Forecast by Region:
Western, South Dakota - A cold front will start to move across the area giving way to the chance of rain, possibly mixing with snow in northwest, South Dakota by tomorrow afternoon. Colder air will then move into the region changing all rain over to a wintry mix or snow as the afternoon continues. Much of western, South Dakota will see accumulating snow with the heaviest snows expected for the Black Hills.
Central, South Dakota - Precipitation will start to develop and spread over the area by Wednesday evening and continue into Thursday before leaving by early Friday morning. The northern half of central, South Dakota will see more snow then rain, the south-central will have rain linger into the overnight hours on Wednesday before changing over to snow. The snow amounts look to be the heaviest towards the north.
Northeast, South Dakota - This region will be the battle ground between rain and snow. The total amount moisture possible with this event is from 0.50 to 0.75 of an inch. This region may see rain, mix with snow, freezing rain and then light snow by later in the day on Thursday. The best risk for snow will be the western half of northeast, South Dakota where one to three inches are possible.
Southeast, South Dakota - Starting Wednesday evening, rain is expected to move into the region before transiting into snow by Thursday night into Friday morning. Snow amounts in this region look to be mainly under an inch, with under two inches in east-central, South Dakota.