The Weather Service is still looking at 1 to 4 inches of snow in the metro area, likely resulting in treacherous driving conditions tonight and early Tuesday morning.

A winter weather advisory touching nine states and reaching from New Mexico to Indiana covers almost all of Missouri and Kansas. It’s in effect locally through 6 a.m. Tuesday. That means difficult driving conditions and limited visibility.

Reports of snow accumulation are coming in, and, as expected, north-central Missouri is getting most of it so far. By early afternoon, the Weather Service was reporting 5 inches on the ground in Moberly and Macon and 3 inches in Marshall, Carrollton and Boonville. Closer to home, Olathe had 3 inches, Pleasant Hill and Harrisonville had 2 inches, and a weather spotter in Grain Valley reported 1 inch.

In the metro area, the snow that’s been falling and then melting on treated or well-traveled roads is expected to freeze as temperatures fall into the 20s this afternoon. Another burst of snow is expected late this afternoon, tapering off in the middle of the evening. There could be drizzle or freezing drizzle.

But the Weather Service’s main worry is black ice forming where melted snow freezes, creating what the agnecy calls “extremely hazardous walking and driving conditions.” Bridges and overpasses will be among the first place where roadways will have ice.

The forecast:

• Snow until midnight, followed by flurries. Low of 18. Wind out of the north-northwest at 9 to 11 mph.

• Cloudy on New Year’s Day, gradually becoming mostly sunny. High near 27. Clear in the evening. Low around 14.

• Warmer Wednesday with a high near 33. Low around 16.

• Back to colder Thursday then gradually warming. Thursday high of 26; low of 13. Friday 32/19. Saturday 37/21. It might hit 43 Sunday. Generally clear all four days.

National Weather Service, Pleasant Hill: www.weather.gov/kc

Traveler Information Map: http://maps.modot.mo.gov/timi/