The National Weather Service has issued a flood watch for Northern New Hampshire and parts of Central New Hampshire.
The alert is in effect from Wednesday at 8 p.m. through Thursday afternoon.
The targeted area includes Grafton and Carroll counties. There is a "hazardous weather outlook" for points south of those counties, with forecasters warning of possible minor flooding.
The forecast anticipates a combination of rain and snow melt resulting in minor flooding at the region's headwaters.
The National Weather Service identified the Androscoggin River and the Saco River as two rivers most at risk for flooding during this time.