Highs today made it way above normal but south winds are soon to change over. A strong cold front has already chilled many Canadians down 15-30 degrees over the past 24 hours. That same air mass is moving into KELOLAND starting this evening. Winds have been close to 40 mph late today in Rapid City and just behind the front, a light line of moisture is causing rain showers and light snow in the western Black Hills.
Many will actually have a mild night but we should barely warm at all tomorrow. Clouds, cold and wind take over and we also have the chance of blowing snow in the northeast. A Winter Weather Advisory was extended for some east of Aberdeen. Up to four inches of snow is possible in the higher Hills but overall amounts in northeastern South Dakota should be much less.
Sunshine returns Tuesday and while the winds will die down, we’re in store for the coldest day of the week. The start of Wednesday looks nice but changes will be swift during the afternoon. South winds will increase and that should funnel some moisture in from the Gulf of Mexico. While the center of the late-week storm will stay to the west for a long time, a leading wave of snow looks to move into West River late Wednesday.
By Thursday this system will intensify. Unlike past storms, this will be almost all snow and that could allow accumulations to quickly rise.
The best moisture is in play for the southeastern counties and we should be looking for at least several inches of snow. Our model guidance has not moved a huge amount over the past two days and we’re continuing to raise overall chances.
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