An unsettled weather pattern is developing in the Eastern U.S. with heavy rain and flooding possible from the Ohio Valley to parts of the Northeast. A flood watch already has been issued for six states this morning.

A flood watch has been issued for six states from Kentucky to New York.(ABC News) A flood watch has been issued for six states from Kentucky to New York.

More heavy rain is expected tonight and into tomorrow morning as the storm heads east.

Tonight and tomorrow morning, heavy rain is expected from Tennessee to Maine.(ABC News) Tonight and tomorrow morning, heavy rain is expected from Tennessee to Maine.

Another storm system will develop Saturday night along the East Coast, bringing even more precipitation. Snow is a strong possibility north of Washington, D.C., in Philadelphia, New York and Boston.

Snow is a possibility this weekend in the Northeast.(ABC News) Snow is a possibility this weekend in the Northeast.

As much as 3 inches of rain may fall in parts of the Ohio Valley and into Appalachia and the Northeast.

Parts of Appalachia and the Northeast may see heavy rainfall in the coming days.(ABC News) Parts of Appalachia and the Northeast may see heavy rainfall in the coming days.

Spokane, Washington, yesterday got 7 to 10 inches of snow, enough to make it the city's snowiest Valentine's Day ever. With this system moving south, Winter Weather Alerts have been issued for seven western states from Montana to Texas.

Winter Weather Alerts have been issued for seven western states.(ABC News) Winter Weather Alerts have been issued for seven western states.

That storm is dropping heavy rain in Arizona and New Mexico today and snow in the Rockies.

Heavy storm were expected early this morning near the Rockies.(ABC News) Heavy storm were expected early this morning near the Rockies.

That system will continue into the Southwest deserts this afternoon.

Parts of Arizona and New Mexico may get an inch of rain.(ABC News) Parts of Arizona and New Mexico may get an inch of rain.

Rainfall totals in Arizona and New Mexico may reach 1 inch, and parts of Colorado may see 2 feet of snow.

Parts of Colorado may see 2 feet of snow.(ABC News) Parts of Colorado may see 2 feet of snow.