7:55PM
First, the weekend. Short and to the point. High pressure will be in control Saturday and it will be a wonderful Summer day. On Sunday, it will start very nice but a disturbance rapidly approaching from the west leading humidity back into the region will bring increasing clouds and an eventual risk of some rain from west to east in the afternoon and evening. It won’t turn out to be a wash-out, but some areas are likely to get wet before the end of the day. If the timing of this disturbance is slower than I expect right now, we’ll salvage most of Sunday rain-free. Greatest chance of a completely dry day will be from Rhode Island and far southeastern MA through Cape Cod.
Next week? Spare me the drama. Ok, yes there will be a somewhat significant trough of low pressure which includes an closed upper level low pressure area somewhat resembling the infamous “polar vortex” of this winter-past. But don’t let the media’s depiction of this slightly anomalous feature (for July) get to you. These features do occur in Summer, and one will take place next week, setting up a chilly outbreak of air, in comparison to average, coming out of Canada into the Midwest, eventually making its way to the Northeast in modified form. Before that happens, there will be a clash of air masses, with that cool air advancing in from Canada clashing with the warm/humid air that will be lead in by Sunday’s approaching disturbance. This will set up a chance of showers and thunderstorms in the Monday-Wednesday period. This far out, it’s impossible to time these and also nearly impossible to predict the intensity of showers/storms. Suffice it to say, there is some risk for significant rain and even some severe weather, but I’m not going to alarm anybody this far out by predicting some giant long lasting event of severe storms and flooding. I’ll watch the potential as it gets closer and update accordingly.
By late next week, we should go from a dry/cool day Thursday to a dry/warmer day Friday as things move along in the atmosphere.
Forecast for southeastern New England…
TONIGHT: Any scattered clouds vanish with a clear sky and bright full moon. Lows 55-64, coolest interior valleys, mildest urban areas. Wind light variable.
SATURDAY: Sunny. Highs 70s South Coast & Cape Cod, 80-85 elsewhere. Wind S 5-15 MPH.
SATURDAY NIGHT: Mostly clear. Lows 58-66. Wind S under 10 MPH.
SUNDAY: Mostly sunny start then increasing clouds west to east. Chance of light rain or showers by mid to late afternoon especially north and west of Boston. Highs 70s South Coast & Cape Cod, 80-85 elsewhere. Wind S to SW 10-20 MPH.
MONDAY: Mostly cloudy. Numerous showers/thunderstorms. Low 68. High 82.
TUESDAY: Variably cloudy. Scattered showers/thunderstorms. Low 67. High 83.
WEDNESDAY: Partly sunny. Isolated showers/thunderstorms. Low 66. High 80.
THURSDAY: Partly cloudy. Low 54. High 75.
FRIDAY: Mostly sunny. Low 59. High 83.