The first warning day for snow tonight and Wednesday
Early warning weather:
- Rain/Mix will change to all snow tonight
- Wet, heavy snow will fall before midnight Wednesday
- The worst travel conditions will be Wednesday morning
- The snow will taper off in the mid-morning to late evening and melt throughout the day
Tonight-Wednesday morning: Rain from the south tonight, changing to all snow overnight. The heaviest snow is expected between midnight and 8 a.m. Snowy and slushy driving conditions on Wednesday. Although the morning temperature will be borderline freezing, it will overcome the high rate of snowmelt, allowing snow to accumulate on elevated surfaces and grassy areas. In areas with less snow, the roads become swampy, and in areas with heavy snowfall, it blocks the road for a while in the morning before turning into a slush. Expect wet and thick snow, which is great for snowmen, but takes a toll on the body when shoveling. In the metro, 2 to 7 inches will be common with 2 to 3 inches in St. Charles County, 3 to 4 inches in St. Louis, and a maximum of 4 to 7 inches in south/southeast Missouri’s Jefferson County. Monroe and St. Clair County, Illinois. Some areas in southeast Missouri could see 9 inches and higher. Remember that snow melts throughout the day, so accumulations will decrease throughout the day when temperatures are at or above freezing.
Wednesday afternoon-evening: Although showers are possible during the day and evening, no additional accumulations are expected. With thawing and crews plowing, roads should improve quickly in the afternoon and evening. However, moderate travel impacts will remain in rural areas (and particularly in the south, where heavy snowfall is expected). The daytime air temperature is 36°, there is a slight wind, the wind is 10-15 m/s from the northwest, the gust is 20-25 m/s.
Thursday morning: We’re down to a low of 27°, so we’ll have to watch for the thaw to refreeze for Thursday morning’s commute.
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