Metro Boston, North Shore and western suburbs: Yesterday we spoke about two opportunities for showers as an upper level disturbance and later a cold front would impact our weather. During the morning and into the afternoon hours the shower and thunderstorms from the disturbance remained to our south with the heaviest activity along the Connecticut coast, Rhode Island and finally across southeast Massachusetts. We remained on the edge of the clouds from this system and it did become mostly cloudy by later in the day. The second opportunity would be the approaching cold front but any shower activity associated with that dried up before reaching the coast. Once again the immediate metro Boston area and North Shore missed out on any appreciable precipitation. Although there could be a sprinkle or two today we will not have another shot at meaningful rainfall until Monday night or Tuesday and that is not a given at this point.
The cold front is pushing offshore this morning and skies are beginning to partially clear out. With the drier air moving in you will notice the humidity levels dropping and overall a much more comfortable day will unfold during the day. However, clouds likely bubble up again this afternoon and there is a chance of a brief shower or sprinkle later in the day and this evening, before skies partially clear overnight. It will be much cooler tonight as the flow of pleasant air continues over the area.
High pressure presents itself for the weekend and is forecast to be centered over western New England Saturday night. A Fall like start to the weekend on Saturday with a sunny and cool start, becoming partly cloudy in the afternoon. Temperatures running about 5 degrees below normal. A chilly night follows Saturday night and then a return to more seasonal temperatures on Sunday with fewer afternoon clouds around.
By late Sunday night the high pressure system sinks to our south and we are in a return flow of southwest winds and warmer temperatures with humidity levels beginning to increase on Monday. There is a threat for showers at night or Tuesday as a disturbance approaches the region.
In case your wondering we still have not had a 90 degree day recorded in Boston. We did come close this week but the month of August is zero for 22 with respect to a 90 degree day. It would be quite unusual to go the entire month without reaching 90 and time is running out. As for precipitation Boston has recorded 1.82 inches, however 1.62 of that fell in one day, on the 9th. Average rainfall for August is 3.35 inches.
Four Day Outlook:
Friday: Partly cloudy, becoming less humid and not as warm. Slight chance of a sprinkle or brief light shower this afternoon. High temperatures near 80 degrees, mid 70s along the coast. North winds 5 to 15 mph, becoming east and northeast along the coast.
Friday night: Chance of an evening sprinkle or shower, followed by partial clearing overnight. Lows in the mid to upper 50s, to 60 degrees in Boston. Northeast to north winds 5 to 10 mph.
Saturday: Mostly sunny, becoming partly cloudy through the afternoon. Cool, highs in the mid to upper 70s. Northeast winds 5 to 15 mph.
Saturday night: Clear and cool. Lows near 50 inland valleys, low and mid 50s elsewhere. Winds near calm.
Sunday and Sunday night: Mostly sunny, with fair skies and a few clouds overnight. Milder, highs around 80 degrees. Nighttime lows in the mid to upper 50s.
Monday and Monday night: Partly sunny, becoming mostly cloudy overnight. Highs in the low 80s, with overnight lows in the low to mid 60s.