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Boston weather: Showers today, steady and heavier rain stays south

Steady rain streams northward but the heaviest rain remains to our south today.
Steady rain streams northward but the heaviest rain remains to our south today.

Metro Boston, North Shore and Metro West: One thing we can say about this Summer is the weekend weather has for the most part cooperated with our outdoor plans. Many of the weekend days have been dry and sunny given us the opportunity to get outdoors and enjoy what Mother Nature had given us. This weekend we kind of pay the price for all the nice weekends in June and July as wet weather approaches this morning, courtesy of low pressure riding up the coast to our south. However, there is some room to be more optimistic for Sunday.

The Saturday morning weather map shows weak high pressure in our neighborhood but the main feature is low pressure centered on the Virginia Coast with a frontal boundary lying across the waters off the south coast of New England. A large batch of rain has expanded across the New York City area, Long Island and into Connecticut and Rhode Island. A few scattered showers run out ahead of the main area of rainfall. The low tracks over Cape Cod and then into the Gulf of Maine by tomorrow morning. The steadiest and heaviest rainfall is destined to fall across southeast portions of the state today, including the cape and islands, tapering off to lighter amounts north of Boston and more so west of Route 495. For the forecast area look for showers this morning, perhaps a period of steady rain midday, then tapering back to occasional showers in the afternoon. We could even see a peek of sun late afternoon or evening.

Although there may be some drying behind the departing low on Sunday, there remains a chance of showers especially across the eastern portion of the forecast area. There could be some breaks of sunshine, especially away from the coast. Another impulse of energy moves offshore and this brings another threat of rain to areas south of Boston, perhaps just a few scattered showers north and west of the city into Sunday night. Watch for patchy dense fog late night into early Monday.

Temperatures through the weekend remain cool with highs today 70 to 75 degrees, coolest on the coast. Average highs this time of year is about 82. Lows tonight in the upper 50s to low 60s and then the mercury recovers only to the low and mid 70s again on Sunday, maybe some upper 70s across the interior if there is enough sunshine. Winds stay light through the weekend, generally off the ocean at less than 10 mph.

Monday, early cloudiness and areas of fog, perhaps a spot shower, then partly cloudy conditions develop. But, an afternoon shower or isolated thunderstorm cannot be ruled out. Highs mid 70s coast to low 80s inland.

Monday night, partly to mostly cloudy. Areas of fog redevelop. Lows in the low to mid 60s.

On Tuesday Tropical Storm Bertha will be moving between the North Carolina Coast and Bermuda. She is destined to be pushed far out to sea and well southeast of New England mid week. However, there will be enough moisture in these parts riding up the coast to bring a continued risk for a shower or thunderstorm Tuesday ahead of an approaching cold front.

Once the cold front pushes out to sea conditions improve for late week with drier humidity and pleasant temperatures as high pressure takes control.

Weekend North Shore beach outlook:

Saturday: Showers, perhaps a period of steady rain midday, especially south of Cape Ann. Cool, highs only in the upper 60s to 70 degrees. Light northeast winds. Water temperatures in the mid 60s. UV Index low to moderate. High tide late in the afternoon.

Sunday: Risk of a shower, otherwise peeks of sun and remaining cool. Highs around 70. Light northeast winds. Water temperatures in the mid 60s. UV Index high, high tide late afternoon.

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