A wintry mix will usher in the beginning of spring.

The rain and sleet begin during the Tuesday morning commute, then it starts mixing with some snow. Roads should just be wet during the day Tuesday.

Widespread moisture will bring a rain-snow mix along the I-95 corridor, snow to the north and west, and rain to the south on Tuesday morning.

Accumulations of a coating to 3 inches are possible by Tuesday evening, especially northwest of the city and mostly on the grass.

The second round of the storm will begin Tuesday night, leaning more toward snow and sleet.

Additional accumulation is expected, even on the roads, especially by sunrise Wednesday. Snow will continue on Wednesday, but it’ll have a hard time adding up on the roads during the daytime. Roads could turn slick or covered again Wednesday night, before the snow departs.

Storm total accumulation by Wednesday evening will be found mostly on grass and less on roads and could reach 3-5” in the Baltimore area and 5-10” in the northwest sections of the state.

The State Highway Administration said it is pretreating its northern region -- northern Baltimore, Frederick, Carroll and Harford counties -- Monday in advance of the storm.

SHA said it is not in danger of running out of salt and that it has been replenishing its supply between storms.

Temperatures return to the 40s Thursday and Friday.

From the National Weather Service: 

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY EVENING...

* WHAT...Heavy wet snow possible. Total snow accumulations of 5 inches or more are possible.

* WHERE...Portions of The District of Columbia, central and northern Maryland and northern and northwest Virginia.

* WHEN...From late tonight through Wednesday evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Significant reductions in visibility are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts.