Greater Boston, North Shore and Metro West: Yesterdays storm system that dumped interior snow and mostly coastal rain to the area is pulling away this Thanksgiving morning. A disturbance will quickly move eastward out of the Great Lakes and upper Ohio Valley during today keeping skies mostly cloudy with a chance of a few snow flurries. The system teams up with a developing offshore storm tonight and could possibly bring eastern most areas, especially along the coastal plain, accumulating snow late tonight into midday on Friday.
Coastal areas saw mostly rain yesterday with the rain changing to snow across the interior. Although the rain on the coast eventually changed to snow later at night it was after most of the moisture had passed to our north thus keeping down accumulations along the coastal plain. Many communities along and west of the Route 495 belt received 4 to 6 inches of snow with areas across the Merrimack Valley generally reporting 3 to 5 inches. As expected the jackpot were areas across northwest Middlesex County and northern Worcester County where the snow piled up to 6 to 11 inches there. As you moved closer to the coast the amounts dropped to about 1.5 to 2 inches along the Route 128 belt eastward, diminishing to less than an inch along the shore.
The traditional high school football games are going to be played in cold and breezy conditions this morning with temperatures in the 30s. Clouds will allow a few peeks of sunshine but overall the sky cover is expected to be mostly cloudy as the day wears on. A passing flurry cannot be ruled out. High temperatures will only top out in the upper 30s this afternoon. A brisk northwest wind will diminish through the day.
Our focus quickly turns to the approaching upper level disturbance. This will keep it cloudy tonight with a chance of a few snow flurries, perhaps turning into a steady snow after midnight. The highest risk area for accumulating snow late tonight and into Friday morning will be across eastern Essex County, Suffolk County and points south to the Plymouth area.
Although the National Weather Service has not issued any weather advisories, watches or warnings as of this morning it is advised to pay close attention for any changes in the forecast, especially for you folks that live closer to the coast, since the forecast appears to be a very tricky one with a margin of only 20 or 25 miles making the difference between several inches of snow or very little if any. There is the chance that any snow bands that set up remain just offshore, but if those bands set up on the coast and persist then the snowfall will be heavier, perhaps over 4 inches in spots. These conditions would likely persist through Friday morning making for possible travel headaches for you Black Friday shoppers in the areas close to and right along the coast. Across the interior you may see some afternoon sun as the event winds down.
It will remain cold enough for all snow this time around, except over Cape Cod, with lows tonight down in the 20s and highs on Friday only around 35 degrees. Light north winds tonight turn more northwest Friday and could become gusty along the coast in the afternoon.
After the shopping has calmed down by Friday night so will the weather. With the ocean storm pulling away the trough will move out as well. It will be even colder with lows in the mid to upper teens inland to the low 20s along the shore under mostly clear to partly cloudy skies.
High pressure then pays a visit over the weekend as temperatures turn milder on Sunday into Monday. Partly cloudy through midday Saturday, then mostly cloudy at night into Sunday. A cold Saturday with highs once again close to 35. Winds will turn light southwest and with cloud cover and the milder breeze lows Saturday night stay in the mid 20s to near 30. Highs on Sunday well into the 40s with a mix of clouds and sun.