Metro Boston, North Shore and Metro West: The Boston area and points north and west saw very little rain on Saturday as the steadier and heavier rain fell across the southeast portion of the state. It appears this scenario will be repeated today with the communities north and west of the city seeing very little shower activity, staying mainly dry through the day. For those of you heading toward Cape Cod today the rainfall threat increases but it now appears the bulk of the heavier rain stays offshore.
Low pressure has moved into the Gulf of Maine with the stalled frontal boundary still lingering offshore. Another impulse of energy rides along the frontal zone today forcing a batch of rain into southeastern Massachusetts this morning. This will bring a few light showers or sprinkles into the forecast area through midday as once again the steadier and heavier rainfall remains well southeast of Boston. Otherwise clouds will dominate today. It becomes drier during the afternoon, with peeks of sun possible outside of the coastal plain. Another cooler than normal day is on tap with highs in the mid to a few upper 70s across the interior, but only in the low 70s on the shore. Overnight, clouds hang in and patchy fog may develop. Lows in the low 60s, possibly upper 50s well inland. A light onshore breeze continues.
On Monday the frontal boundary remains just offshore. Early patchy fog and clouds give way to partial clearing. However, a spot afternoon shower cannot be ruled out although most neighborhoods stay dry. Temperatures should run about 5 degrees milder on Monday, highs in the mid to upper 70s coast to low 80s inland. Light winds continue, likely onshore along the coast.
By Monday night and during Tuesday the frontal boundary starts to shift offshore as another weak disturbance pulls away from the area. Meanwhile, Tropical Storm Bertha will begin to move well off the North Carolina Coast as she begins to arc toward the open Atlantic waters and well southeast of New England during Wednesday. A cold front will also come into play as it crosses eastern Massachusetts Wednesday morning.
Monday night through Wednesday skies average partly cloudy, but there will be patches of mostly cloudy sky coverage at times. A spot afternoon shower is possible Tuesday and Wednesday, chance of an isolated thunderstorm, primarily in the afternoon. Highs in the upper 70s to low 80s Tuesday and Wednesday, possibly mid 80s mixed in through the interior. Overnight lows Monday night through Wednesday night in the low to mid 60s.
Once the cold front moves offshore the drier air begins to take hold as high pressure takes control of our weather Thursday and Friday. Pleasantly mild, highs in the low 80s, slightly cooler on the beaches. Nighttime lows in the upper 50s to low 60s.
North Shore beach outlook:
Sunday: Mainly overcast skies, chance of a light shower or sprinkle through midday. Brightening skies and chance of a peek of sunshine later this afternoon. High temperatures in the low 70s. Light onshore winds. High tide late in the afternoon. UV Index moderate. Water temperatures mid 60s. Surf only 1 to 2 feet.