A winter storm warning is now in effect for the immediate Midcoast and the National Weather Service is forecasting heavy snow overnight into Thursday morning.

The worst conditions, including a combination of heavy snow, strong wind gusts, and coastal flooding, will occur around Thursday morning, said NOAA, in a 4:24 p.m. weather update.

What is new:

• Increased snow amounts a few inches along the coast, bringing some values just shy of a foot of snow. There will likely be a very sharp gradient of amounts with just a few inches of snow on immediate beaches, to significant amounts just inland.

• Increased wind and wind gusts on the western slopes of higher terrain, mainly the White Mountains due to downsloping. Peak gusts late tonight and Thursday morning may exceed 60 mph. 

Warmer temperatures near the coast may lead to sticky, wet snow and associated damaged tree limbs and power outages.

Snow showers will linger through the first half of the weekend.

On Mon the cloud forecast remains optimistic. I have used eclipse temp tool to reduce hourly values down during the hour of totality. I would suspect with fresh snow on the ground in the path that temp drop will happen rather fast. Otherwise looking at conditions for eclipse chasers there are a couple of concerns. 

One is that there will be deep snowpack in areas of the path of totality...winter roads may be difficult or
impossible to travel. Other locations that see some sun or warmer temps before Mon will see melting...and off road mud may start to become an issue. 

Finally in the higher elevations it will be near freezing...with inversion height forecast to be near ridgeline. This would lead to gusty winds and apparent temps closer to the lower to mid teens. Any hikers should be prepared for winter conditions in the mtns.