A frontal boundary has set up to our north and will be the focal point of our weather over the next several days. The front stays to our north through the weekend. Weak low pressure will ride along it enhancing our chances for showers from later Friday through Sunday. The best chance for showers is Saturday night and Sunday, although the risk exists at anytime during the weekend. The good news will be the milder temperatures as we go from a cold and snowy pattern to a mild and wet pattern.
The mild temperatures and periods of showers will cause considerable snow melt through the weekend. In turn we can expect some areas of minor flooding in low lying areas and also lots of water on the secondary roadways.
Friday, the day begins with partly sunny skies but clouds win out through the day. There is a very slight risk of a late day shower. Mild, high temperatures 40 to 44 degrees. Light southwest winds 10 mph or less.
Friday night, a few scattered showers, otherwise mostly cloudy and mild. Temperatures remain steady through the night at 40 to 44. Southwest winds 10 to 15 mph, diminishing to about 5 mph later at night.
Saturday, more of the same with the chance of scattered showers. Mild, highs 44 to 48. Light southwest winds.
Saturday night, with the frontal boundary sinking south and another wave of low pressure rippling along it we will have a better chance for shower activity. The front may actually move as far south as southern New Hampshire overnight and early on Sunday, before retreating north as a warm front later Sunday. Cooler Saturday night, lows 36 to 40. After a cool start on Sunday temperatures climb to 48 to 52.
The Saturday night and Sunday forecast is tricky. There are some hints that northeast Massachusetts may stay cooler than areas to the south and west of Boston with the approaching front Saturday night and its reluctance to lift northward Sunday. Therefore, our area will remain closer to the frontal boundary with a better chance for more showers and cooler temperatures. The above temperature outlook Sunday has bust potential as temperatures could struggle to move beyond 45 or they could soar well into the 50s depending on the frontal position. It remains mild Sunday night with lows 40 to 44.
We do return to cooler temperatures early next week as a cold front moves through here on Monday. Behind the front cooler and drier air sets in and by Tuesday we can expect below normal temperatures once again with generally fair skies. Highs Monday near 45, cooling to about 35 Tuesday. Overnight lows Monday night near 30, then much colder Christmas eve, lows close to 20.