WINTER WEATHER: Timeline for Cecil County Snow

At the end of the rainbow on St. Patrick's Day, there may be a pot of snow.

The National Weather Service has issued a winter weather advisory for Cecil, Baltimore, Carroll, Frederick, Harford, Howard and Kent counties plus Baltimore City.

The advisory in Cecil County is effective from 8 p.m. Sunday to noon Monday.

In other parts of Maryland, it's from 7 p.m. Sunday to 2 p.m. Monday.

The Cecil County advisory calls for "generally 1 to 3 inches of snow," with up to 4 inches in parts of Kent County as well as New Jersey and Delaware.

Precipitation will start as a rain-snow mix early Sunday evening and change to all snow by late Sunday night.

The heaviest snow will be midnight to Monday morning, the National Weather Service reported, noting that roads will be slippery.

A winter weather advisory means periods of snow will cause travel difficulties, and people should be prepared for snow-covered roads and limited visibilities.