Major winter storm aiming for St. Louis Sunday. Significant winter storm impacts expected.

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ST. LOUIS (KSDK) – This relentless winter is sending us one of the strongest storms of the season on Sunday.

The National Weather Service has issued a Winter Storm Warning for most of our area this evening through 6 a.m. Monday due to the winter storm headed for St. Louis.

Saturday's forecast is dry during the day with temperatures the lower 30s. Folks heading to the Soulard Mardi Gras parade should bundle up. A wintry mix of sleet, freezing rain, rain, and snow will begin late Saturday night and persist through Sunday finally tapering off as flurries early Monday morning.

RADAR: Follow the storms' path on our interactive radar

FORECAST: Get the most-up-date forecast on the weather page

Throughout Sunday, snow is expected to be the dominant precipitation type for northern parts of the viewing area. Along Interstate 44, through the metro and along Interstate 70 in Illinois, we are expecting to start as primarily sleet, with a mixture of rain and freezing rain to the south of St. Louis. Those areas south of the city could expect anywhere between 2 to 4 inches of snow, with between 4 and 6 inches along the I-70 corridor.

It's important not to focus too heavily on total accumulations because as the precipitation type changes the totals get muddy . The bottom line is a mixture of snow with sleet and freezing rain will make travel treacherous on Sunday. If you can avoid being on the road Sunday, please do.

Heaviest snow accumulations will be in northeast Missouri, with 10 inches of snow or more expected in the northern parts of our viewing area, generally along and north of I-70. A mixture of 3-6 inches of sleet and snow is expected along I-44 through the St. Louis metro and up along I-70 in Illinois. Farther south, along I-55 and I-64 heading into Illinois, there is the potential for significant icing of anywhere from a tenth to a half an inch of icing. Cold air will take over Sunday night, and it will turn to all snow as the storm winds down early Monday morning.

This storm system is crashing onshore in California today, as it comes on land we will get more information and will continue to update the forecast as the storm approaches. Bottom line: travel will be treacherous on Sunday and areas that see significant icing are subject to power outages. Plan for very difficult travel conditions across the entire area.

We will be covering the winter storm from start to finish on NewsChannel 5 and online. You can track the storm with radar available on our First Alert Weather app.

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