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Signs of the first snowflakes of the season in metro Detroit

Posted at 10:57 AM, Oct 23, 2019
and last updated 2019-10-23 12:32:25-04

(WXYZ) — Long-range forecast models are pointing at our first shot of polar air diving south from Canada some time next week. This could lead to a snow/rain mix as early as Monday night, or as late as Thursday night (Halloween) next week.

The GFS (American) forecast model shows a trough of cold air quickly moving into Michigan around Tuesday. Highs could be in the 40s with lows in the 30s. This would support some flakes mixed with rain, and nothing sticking to the ground.

The European forecast model shows a storm system developing in the eastern U.S. Sunday, which would slow down the progression of the cold air moving into Michigan until later in the week. This means we could actually warm up Tuesday and Wednesday, before a big temperature drop Thursday into Friday.

The Climate Prediction Center's temperature outlook paints Metro Detroit in a 50-60% chance of below-average temperatures next week. Regardless, if we see snow or not, we should be ready for a big temperature drop before the end of next week.

Every ripple in the atmosphere affects the next, so we'll just have to wait and see how this weekend's storm system across the Southeast U.S. develops first in order to see how the pattern may evolve next week.