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Forecast: Risk Of Showers Or Thunderstorms Ahead

BOSTON — The first full week of August will be somewhat unsettled but no day will have more than a couple of hours of rain and there won’t be any major heat.

Tropical storm Bertha continues to move northward this morning parallel to the southeast coast but remains far enough offshore to only pose a problem to fisherman and shipping. The storm could still become a hurricane later this week and provide some nice waves to our coastline but that would be toward Wednesday.

Our weather is controlled this morning by a light flow of moist and warm air. This air mass is unstable enough so clouds will be in the forecast the next few days along with a risk of showers. Most of us stay dry today and Tuesday with the highest risk of rain on Wednesday.

I left showers in the forecast today and tomorrow because there is a risk of them. If you see a shower it could leave some big puddles as any storms that form will move slowly. In these situations half of a town can see a downpour while the other side of the same municipality is dry.

The showers become more widespread for a few hours Wednesday before the risk lowers again for the end of the week. Humidity will be noticeable the first half of this week and then fall to a more comfortable range at the end of the work week.

There is still no big heat in sight.

Monday: A blend of clouds and sunshine. There is still the risk of a shower or thunderstorm but most of the time and most areas are dry. Highs near 80 (70s on Cape/Islands).

Monday night: Partly cloudy and any evening showers end. Lows in the 60s with a bit of mugginess to the air.

Tuesday: Partly sunny and warm. Highs in the low to mid 80s. Still the risk of thunderstorm.

Wednesday: Sunshine, clouds and warm. Highs near 80. A higher chance of a few showers and storms.

Thursday: Partly sunny and pleasant. Highs in the upper 70s to near 80.

Friday: Mostly sunny with a high near 80.

Follow updates from David Epstein on Twitter @growingwisdom.

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