Metro Boston, North Shore and western suburbs: A busy radar early this morning is depicting showers and a few thunderstorms throughout the area, some with tropical downpours. We remain in the moist and humid air mass with the southerly flow continuing to bring the sticky air into our neighborhoods into Tuesday. Along with that is the ongoing threat of showers and thunderstorms on Labor Day, Monday night and into at least a portion of Tuesday. Some locally heavy downpours are to be expected Labor Day, especially in the morning. In between the shower activity we can expect some dry slots and brightening skies. The activity should lessen overnight and then increase again Tuesday ahead of an approaching cold front. The National Weather Service has issued a Flash Flood Watch for our area that will be in effect until 11 pm tonight.
This mornings weather map has a cold front across the eastern Great Lakes. This will be our salvation from the warmth and oppressive humidity of the last several days, but is not likely to pass through here until midday Tuesday or during the afternoon. You should finally be able to shut off the air conditioners and fans Tuesday night as temperatures begin to cool down.
With the front to our east a nice refreshing air mass overspreads the local area mid to late week as high pressure takes control. Cool temperatures and much less humid air will bring a feel of Fall once again. A secondary cold front will draw down even cooler air toward the end of the work week.
The climate summary for the three month period of June 1st through August 31st is in for Boston. Overall, temperatures for this period ran +1.9 degrees over normal, making it the seventh warmest ever, mostly due to the late June heat and July being a very warm month. Rainfall was +5.49 inches, primarily due to the wet June in which we received over 6 inches the normal amount for that month, making it the 3rd wettest on record. The period ended on a dry note in Boston with less than a quarter inch of rain over the last three weeks of August.
Four Day Forecast:
Labor Day: Showers likely, chance of a few thunderstorms as well. Tropical downpours possible at times this morning. Humid. High temperatures in the mid 70s coast to 80 degrees inland. Light south winds, possibly southeast along the coast.
Tonight: Chance of a few showers. Otherwise, mostly cloudy and continued humid. Areas of fog late. Lows in the mid to upper 60s, about 70 in and around Boston. Light south winds.
Tuesday: Areas of fog and showers in the morning, chance of a thunderstorm, followed by partly to mostly cloudy in the afternoon. Chance of an afternoon shower or storm. Highs in the upper 70s to 80 degrees. Light southwest winds turning west to northwest.
Tuesday night: Partly cloudy, turning less humid and cooler by morning. Chance of an evening shower. Lows in the mid to upper 50s.
Wednesday and Wednesday night: Sunny start, becoming partly cloudy in the afternoon and overnight. Less humid and pleasant. Highs in the mid to upper 70s. Lows in the mid to upper 50s.
Thursday and Thursday night: Partly cloudy. Cooler, highs in the low 70s. Overnight lows in the upper 40s to low 50s.