Caribou, ME – Northern and Eastern Maine are facing an elevated ice jam threat this week as warming temperatures accelerate snowmelt, raising river levels and increasing the risk of localized flooding. The National Weather Service (NWS) in Caribou has issued an update to its Winter/Spring Flood Outlook, warning of heightened concerns through March 19.
According to the NWS, the ice jam threat is elevated for Eastern and North-Central Maine from March 15-18, while Northern Maine faces a limited risk from March 16-19. A significant warmup beginning Friday and continuing into next week is expected to accelerate snowpack loss, causing rivers and streams to rise gradually. The natural flow of rivers remains below normal, but the combination of melting snow, warm temperatures, and incoming rainfall has prompted concerns over ice breakage.
The report highlights that snow depth in Northern Basins ranges from 14 to 25 inches, with isolated areas reaching up to 32 inches. Meanwhile, river ice in key locations, including the St. John, Penobscot, and Piscataquis rivers, is thinning, with some areas showing signs of rotting ice. Ice jams may form near dams and turbulent tributaries, potentially leading to minor flooding.
Residents in flood-prone areas should remain alert and monitor updates from local authorities. The NWS advises keeping an eye on river levels and being prepared for potential localized flooding in low-lying areas. More details can be found at weather.gov/car.
