It was quite the changeable day with early morning showers giving way to lots of sunshine followed by some nasty late afternoon storms. A cold front crossed the region last night preceded by some rough showers and storms in places. Drier and cooler air was working into the region today but a vigorous upper level disturbance was lagging behind. As it dipped into New England, its chunk of cold air aloft ramped up the atmospheric instability so the storms became rather rambunctious. Check out some of these reports from the Skywarn Spotter Network. The storms became more intense in eastern MA along the sea breeze boundary where air convergence was occurring. The result was dangerous lightning strikes, torrential downpours, damaging wind gusts and hail up to almost an inch in diameter. Fortunately, the action shifted away from Fenway Park just in time for the start of the evening game with the Atlanta Braves.
Now that the disturbance is exiting, the sky has cleared and the air will continue to dry out setting us up for a wonderful Sunday for all outside activities. The air mass is still warm but not dreadfully hot as it was during the heat wave of Wednesday through Friday. Tomorrow’s highs will be in the middle 80s but the humidity will be low with dewpoints in the pleasant 50s. Sunshine will rule the sky decorated by just a few clouds as a weak bubble of high pressure takes control. After that, another deepening upper level disturbance will actually close off into a solid low pressure circulation over New England on Monday and Tuesday. This evolving pattern is destined to release copious amounts of rain with some lightning and thunder in much of the region on Monday as a surface wave of low pressure lifts across the area. A dry slot may enable clearing Monday night with sunshine possible early Tuesday before clouds fill in the sky and unload some more showers and scattered thunderstorms by midday through the afternoon. This upper level low system is likely to whirl around through Wednesday so some more scattered showers are likely with limited breaks of sunshine. Thursday should be a bit sunnier but clouds will tend to rule and a shower cannot be ruled out. Beyond that, the upper low exits and another surge of very hot weather attempts to push into the Northeast. Presently, I am not convinced that it will be successful before getting pinched off by a push of cooler air from Canada. It could warm into the 80s part of next weekend before the refreshing air from Canada wins the contest. We shall see.
Newly formed Tropical Storm Debby is about 220 miles south-southeast of the mouth of the Mississippi River in the Gulf of Mexico. Debby is about stationary with maximum sustained winds at 50 mph. Most signs point to gradual intensification with a track to the west and a potential landfall on the Texas coast as a hurricane at midweek. For more information, log on to the National Hurricane Center.
Joe Joyce delivers his AccuWeather Forecast in the morning and I shall return later in the day.
Enjoy the rest of the weekend.