What’s up with this weather? It is September already and it’s time to move on to football weather and here we are still dealing with another stuffy night. If you are tired of this nonsense like me, you will be ecstatic about the forecast because refreshing air is just around the corner. Before it arrives, however, the tropical air will be hanging around and feeding the potential for some more thunderstorms later tomorrow and tomorrow night. Today’s early evening boomers were restricted to a very small area from the nearby northwestern suburbs around Concord and Lexington into Boston down to Quincy and up to Lynn and Salem. The 20-30 minute deluge produced up to an inch of rain with some nasty cloud to ground lightning bolts. Other than a few more isolated showers north of the Mass Pike into southern NH tonight, the main action is destined to develop in about 24 hours or so. Expect lows in the upper 60s to lower 70s tonight with highs tomorrow in the middle 80s. As an intensifying low pressure system tracks across the eastern Great Lakes and across the St. Lawrence Valley through tomorrow, a tightening pressure gradient will lead to the southerly wind ramping up to 15-30 mph tomorrow. A few renegade showers and boomers cannot be ruled out tomorrow afternoon amidst some sunshine and building clouds but a more significant line or 2 of squally severe weather should percolate over NY and PA tomorrow afternoon then proceed into western New England from late afternoon into early evening with arrival time in eastern sections from mid-late evening. Any thunderstorms may release torrents of rain, dangerous cloud to ground lightning, damaging wind and hail. Most signs favor a decay of the storms upon approach to east coastal New England. The activity should progress steadily and move offshore near of just after midnight with clearing before dawn.
Following the frontal passage, the humidity will drop precipitously with dew points crashing from near 70 tomorrow night to near 48 by Sunday noon! There could be varying amounts of feathery cloudiness filtering the sunshine Sunday morning but that should thin out and disappear Sunday afternoon as a scattering of a few small puffy clouds takes over in the afternoon. The westerly breeze will be much lighter than tomorrow’s gusty southerly wind. Expect high temperatures in the upper 70s Sunday then down to the lower to middle 70s on Monday and Tuesday then back up to the upper 70s Wednesday and lower to middle 80s next Thursday and Friday. There will be the feel of fall as the overnight lows will drop to the 45-55 level for 3 nights starting Monday night with a slow rise after that. I am not expecting any humid air to return through next Friday! YAY! Sunshine may be interrupted occasionally by some passing puffy clouds on Monday with fewer clouds on Tuesday and unlimited sunshine Wednesday and Thursday.
During the weekend, “Leslie” will likely strengthen into a Cat1 Hurricane with its center passing more than 100 miles east of Bermuda Sunday. Leslie has been generating large waves over the Atlantic for many days and the higher surf is already crashing onto the beaches of New England. As the storm passes more than 600 miles east of New England Monday and Tuesday, the waves will continue to build from 4 to 7 feet tomorrow and Sunday morning up to 6-9 feet late Sunday and especially Monday. Consequently, the National Weather Service has issued a HIGH SURF ADVISORY starting 8am tomorrow and probably extending into Monday. There will be accompanying dangerous rip currents. The ocean has cooled off with temperatures now in the middle to upper 60s after topping out in the middle 70s a few weeks ago. With the arrival of offshore winds and cooler weather, the ocean temperatures will pull back to the middle to even lower 60s at some beaches.
Joe Joyce will deliver his AccuWeather Forecast in the morning and I shall follow later in the day after my visit and presentation at the Olde Home Days in Clinton, MA.
Have a happy and safe weekend.