A wintry week is in store over the next 7 days as exceptionally cold air pours south into the area late week following snow showers and squalls along its leading edge Wednesday. Our next chance for a widespread, reasonably impactful snow event will be next weekend though the details on that remains uncertain.
Tuesday will feature a mix of sun and clouds becoming gradually obscured by overcast as the first of two cold fronts approaches. This will cross the area Wednesday morning and may interact with enough coastal moisture to squeeze out a few flurries Wednesday morning along the coast though no accumulation or impacts are expected. Temps will be within a few degrees of freezing each day. Enjoy this mild air while it lasts, the polar express is rolling into town on Thursday and is here to stay until Saturday.
The biggest weather story this week will be the cold. The Arctic floodgates will be open for business and cold air will be rushing south Thursday and Friday. The coldest temps look to arrive Friday morning when lows at the coast will slip below zero even as NW winds howl at over 20mph. Temps will be even colder in the mountains with lows between 10 and 20 below zero likely. Wind chills approaching 35 below in the north and 25 below in the south are expected which will result in dangerous conditions for any exposed skin.
Another thing to watch this week will be snow squalls on the leading edge of the Arctic airmass. The GFS paints a fairly impressive picture for Maine in terms of snow squall potential. While squalls won’t be responsible for widespread accumulation, a quick inch or two is always possible along with near zero visibility and strong winds. The other impact will be reduced visibility even after the squalls leave as any fresh fluffy snow from the squalls will easily be blown around by Friday’s winds.
Thankfully, the most bitter of cold temps will retreat off to the east by Saturday with light snow developing from west to east Saturday afternoon. It’s too early to pin down specifics about the weekend event but substantial impacts are not out of the question with some mix of snow, sleet, and ice expected for the entire area. Coastal areas may experience rain for a brief time as well. More to come this week depending on my schedule.