First weather day for snow warning tonight and Wednesday morning

First signal time:

  • Rain/mix changing to all snow tonight
  • Wet, heavy snow overnight through mid morning Wednesday
  • The worst travel conditions will be Wednesday morning
  • Snow tapers off by mid to late morning and melts throughout the day

Tonight-Wednesday morning: Rain will move in from the south tonight, turning to snow overnight. The heaviest snowfall is expected between midnight and 8am. Wednesday’s commute will be a snowy and slushy mess. Although morning temperatures will be near freezing, high snowfall levels will overcome the melt, allowing snow to accumulate on elevated surfaces and grassy areas. Roads will be slushy when the snow is lighter and where there is heavier snow it will cover the road for some time in the morning before turning to slush. Expect wet and heavy snow that’s great for snowmen, but hard on the body for paddling. 2-7″ is generally expected in the metro area with 2-3″ in St. Charles County, 3-4″ in St. Louis, and higher totals of 4-7″ will be just south/southeast in Missouri’s Jefferson County and Monroe and St. Clair County in Illinois. Some areas in Southeast Missouri could see 9″ and even isolated higher totals. Note that snow will also melt during the day, so accumulations will decrease throughout the day as temperatures remain at or above freezing.

Wednesday afternoon-evening: Although light snow showers are still possible during the day and evening, no further accumulation is expected. With crews melting and plowing, roads should improve quickly later in the afternoon and evening. However, rural areas (and particularly in the south, where heavier snow is expected) will see continued moderate travel impacts. Daytime high 36°, light wind 10-15 mph from the northwest, gusting 20-25 mph in places.

Thursday morning: We’re down to a low of 27°, so we’ll have to watch the refreeze melt for the Thursday morning ride.

First weather day for snow warning tonight and Wednesday morning

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