ST. LOUIS - The city is under the gun for a significant winter storm and the coldest weather since the late 1990s.

SEE:School closings and delays

The next storm arrives late on Saturday afternoon into the evening, affecting Missouri first, before surging into Illinois overnight Saturday into Sunday. Conditions are expected to deteriorate throughout the evening hours on Saturday, with snow developing.

As this happens, a cold front will move through the region, with the coldest air for St. Louis metro since January 1999. Lambert St. Louis reported a low temperature of -5 degrees on January 5, 1999. Our expected low temperature by Sunday night and Monday morning may be colder, currently projected at nine degrees below zero.

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In addition to the bitter cold, the snow storm that sweeps through the bi-state area Saturday night will linger into Sunday. By midday Sunday, there will be parts of the region that will have upwards of six to 10 inches of snow, with some spots topping a foot. Snow will taper off on Sunday while the winds increase, leading to areas of blowing and drifting snow.

The frigid cold temperatures will last from Sunday through Tuesday night before a modest warm-up occurs to close out next week.

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