Light winter mix that develops late Saturday evening

ST. LOUIS — A weak weather system is tracking Missouri tonight and is expected to bring a light mix of winter to the St. Louis area through Sunday morning.

Rain begins to mix with some wet snow between Columbia and Springfield beginning at 6:30 p.m. This band is steadily moving east and will begin to encounter slightly colder temperatures as it approaches St. Louis.

This will result in an increasing mix of rain and wet snow late in the evening, with a trend towards mostly snow by midnight.

Most of the area will see little if any accumulation tonight, just enough for hints of white to show up in the grass in places.

The exception still appears to be in a band southeast of Metro St. Louis from near Salem through Fredericktown, Missouri, to Mount Vernon and Flora, Illinois. This is the band where there may be some spots where measurable accumulations of up to 2.5 cm can occur.

Timing for tonight, rain will move into Metro St. Louis earlier west of the city after 8 p.m. Between 10pm and midnight it starts to mix fairly quickly and then transitions to wet snow in places. Snow and rain will be light, tapering to flurries and drizzle after 4am Sunday morning, with nothing but drizzle and flurries expected on Sunday.

Northwest Missouri’s air is a little colder and there has already been a few inches of snow in St. Joseph. Scenes like the ones we’re seeing on the MODOT cameras near St Joseph’s are not expected to be repeated here, but we may still have just enough snow to cover some grassy areas, car roofs and other elevated surfaces overnight to dust mushy.

A larger and more impactful winter storm could hit the St. Louis area by Tuesday night or Wednesday. Light winter mix that develops late Saturday evening

Sarah Y. Kim

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