Thursday, 18 April 2013

Boston weather forecast for Apr. 18, 2013

Boston weather forecast for Apr. 18, 2013, Forecast discussion: A high pressure system centered over Quebec, Canada brought dry air and bright sunshine to all of eastern Massachusetts, including Boston. Temperatures reached the middle 60’s this afternoon. We will see a few clouds this evening, but temperatures will fall into the lower 40’s.

The high will continue to influence our weather through Thursday afternoon, but clouds will begin to move into the region. The clouds will be from a low pressure system that extends from eastern Kansas east to central Maryland. This front will slowly move north, helping to bring warmer air from the south. Our temperatures will be cooler Thursday than today, but as the warm front passes to our north, our temperatures will climb to the upper 60’s on Friday.

View slideshow: Thursday's weather
But, with the warmer temperatures, we will also see precipitation. We will see some scattered showers begin early Friday morning, and will remain scattered into the evening. A strong cold front will be moving towards Southern New England early Saturday morning. We will see the heaviest rainfall during the overnight, and there may be some thunderstorms along the front. Computer models are still forecasting between an inch and an inch and a half of rainfall before the front moves offshore Saturday morning. We will see some slow clearing through Saturday afternoon.

The second half of the weekend looks pleasant, as a new high pressure system will give us mostly sunny skies. However, cooler air coming down from Canada will only give us high temperatures in the lower to middle 50’s into Monday. As we go into Tuesday, a weak low pressure center that will be along Delmarva Peninsula Monday night will be blocked by that high, making the low push towards the north and west. We may see an isolated shower Tuesday afternoon, but at the moment the computer models dissipate this low before it makes its way into Southern New England. A new cold front will bring another round of showers by next Wednesday.

72 hour forecast:

Tonight: Partly cloudy with a low of 40.
Thursday: Sunny skies to start the day, with increasing clouds and becoming windy through the afternoon. We will see a high of 57 with southeast winds at 15-20 mph.
Thursday night: Cloudy with scattered showers after midnight with a low of 51. Winds will come from the south-southeast at 9-12 mph.
Friday: Scattered showers and windy with a high of 69.
Friday night: Widespread showers and rain with a low of 52.
Saturday: Showers and light rain ending by the early afternoon with a high of 60.
Saturday night: Partly cloudy skies and colder with a low of 38.

Extended forecast:
Sunday: Mostly sunny. Highs 53-56, lows 35-38.
Monday: Mostly sunny. Highs 52-55, lows 38-41.
Tuesday: Partly sunny with possible afternoon showers. Highs 55-58, lows 42-45.
Wednesday: Cloudy with showers. Highs 55-58, lows 43-46.

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