Caribou, Maine – A rare atmospheric phenomenon known as an “Omega Block” is setting up over the Northeast, bringing prolonged periods of clouds and rain across Maine through the end of the week.
According to the National Weather Service in Caribou, the Omega Block—a high-pressure system sandwiched between two low-pressure systems—was clearly visible on GOES-19 satellite imagery as of Monday evening. These patterns often cause stagnant weather, and this one is expected to keep Maine locked into cool, wet conditions through at least Friday.
Cities across the state, including Bangor, Augusta, and Presque Isle, can expect persistent showers, below-average temperatures, and limited sunshine. The lows on either side of the Omega Block are drawing in moisture and cooler air, raising concerns about minor flooding in poor-drainage areas and slick roads during the morning commute.
Drivers are advised to slow down on wet roads, and residents should monitor basement sump pumps and clear storm drains. The setup is reminiscent of May 2022’s blocking event that brought nearly a week of rainfall to the region.
The unsettled pattern is expected to continue until the Omega Block breaks down later this week, but additional advisories may be issued if the system stalls further.
