Portions of 15 states were under winter weather advisories on Tuesday morning as a winter storm was expected to bring snow, freezing rain and sleet later tonight and into Wednesday.

Precipitation types and totals were expected to vary by location, according to the National Weather Service, but none of the states were expected to see more than moderate amounts.

The service issued a winter storm warning for Kentucky, advising up to 5 inches of snow was possible through Wednesday, and winter storm watches in other portions of that state and southern Illinois. Other parts of those states, as well as the 13 others in the service’s advisory area, were largely forecast to get between 1 and 4 inches of snow, or other winter precipitation.

The National Weather Service issued the winter weather advisories for parts of Nebraska, Kansas, Oklahoma, Iowa, Missouri, Arkansas, Indiana, Ohio, Tennessee, North Carolina, Georgia, Alabama, Kentucky, Illinois and Virginia, asking motorists there to exercise caution.

Precipitation was falling in Nebraska, Iowa and Missouri as of late Tuesday morning, the National Weather Service’s radar showed, and it was expected to move east into Wednesday.

The National Weather Service also said it was “monitoring the possibility” of a more significant winter storm that could affect major cities in the northeast this weekend. Early forecasts indicate the storm may bring 1 to 2 feet of snow and coastal flooding along the I-95 corridor, the service said, a stretch that includes cities like Washington, Philadelphia, New York and Boston. The service had yet to issue any watches or warnings for that storm, as it may not materialize.

Separately, a storm arrived on the Pacific Coast on Tuesday and triggered several other notices.

The National Weather Service issued winter storm warnings in mountainous parts of California, which could receive 6 to 18 inches of snow by the end of the day. The service also issued flood advisories for other portions of California, saying rain may cause small streams to flood.

Winter weather advisories were issued in parts of Oregon, Washington, Idaho and Montana as a storm was expected to move east into those states later tonight and into tomorrow, but snow totals weren’t expected to be as significant as they were California. Still, the service called for up to 5 inches of snow in Washington’s valleys and 8 inches in its mountains.