DAYS 1-5 (APRIL 18-22)<\/p>\n\n\n\n
It’s been a “slow improvement” weekend as we were expecting, and today will definitely be better than yesterday, but don’t expect full sunshine. With cold air aloft and yet another disturbance to pass by, we’ll still see lots of clouds at times, and possibly another passing rain shower or two. But overall, not a bad mid April day in comparison to the last couple of days. Still on track for the early-week warming but there are a couple of forecast wrinkles to deal with today. First, a small but vigorous disturbance which I hadn’t sniffed out as of yesterday’s update reveals itself to be a shower and thunderstorm threat late Monday afternoon or early Monday evening as it works on some moisture and instability in the region. This small feature will be moving fairly quickly eastward and has the ability to trigger a shower or storm in a few locations especially near and south of I-90, favoring eastern CT, RI, and adjacent southern MA, late in the day Monday. And then a low pressure area moving rapidly eastward across southeastern Canada will send a cold front toward the region Tuesday. It will still be mild ahead of this front, but I’m not quite sure yet how far east that boundary comes. So the mild day may be replaced by a chilly evening or nighttime for areas at least north and west of Boston. We’ll have to monitor that front. I do think that any rain shower activity with that initial front will stay to the north of us. Stronger low pressure trailing this one moves eastward and its center will also pass north of us by Wednesday evening, but this time there will be more moisture available, so I’m expecting a decent round of rain showers sometime Wednesday between the middle of the day and the evening. This day will still be mild ahead of the cold front, but a sharp temperature drop is likely to occur with the passage of that front, setting us up for a blustery and chilly Earth Day on Thursday, possibly with lots of cloudiness on the back side of what will then be pretty strong low pressure in eastern Canada. We may even see some scattered rain and\/or snow showers on that day…<\/p>\n\n\n\n
TODAY: Variably cloudy – times with more sun, times with more cloudiness. Chance of a passing rain shower but dry conditions most areas most of day. Highs 53-60. Wind W 5-15 MPH.<\/p>\n\n\n\n
TONIGHT: Variably cloudy. Lows 40-47. Wind W 5-15 MPH.<\/p>\n\n\n\n
MONDAY: Partly sunny. A late day shower or thunderstorm possible mainly southwest of Boston (eastern CT, RI, south central MA most likely locations). Highs 54-61 South Coast, 61-68 elsewhere. Wind SW 5-15 MPH.<\/p>\n\n\n\n
MONDAY NIGHT: Partly cloudy. Chance of a shower or thunderstorm early evening mainly southwest and south of Boston. Lows 45-52. Wind SW 5-15 MPH.<\/p>\n\n\n\n
TUESDAY: Partly cloudy. Highs 57-64 South Coast region, 65-72 elsewhere. Wind SW 5-15 MPH with higher gusts.<\/p>\n\n\n\n
TUESDAY NIGHT: Partly cloudy. Lows 41-48 northwest of Boston, 49-54 elsewhere. Wind SW 5-15 MPH may shift to NW north and west of Boston.<\/p>\n\n\n\n
WEDNESDAY: Variably cloudy. Rain showers arriving from west to east during the day. Highs 61-68 except cooler South Coast. Wind SW 10-20 MPH.<\/p>\n\n\n\n
WEDNESDAY NIGHT: Rain showers move out, partial clearing follows. Lows 32-39. Wind NW 15-25 MPH.<\/p>\n\n\n\n
THURSDAY: Partly sunny then mostly cloudy. A chance of rain and\/or snow showers. Highs 41-48. Wind NW 15-25 MPH.<\/p>\n\n\n\n
DAYS 6-10 (APRIL 23-27)<\/p>\n\n\n\n
A zonal (west to east moving) weather pattern is expected to be dominant, but with the mean trough position being in eastern Canada and the Great Lakes to northeastern US with the tendency for temperatures below normal. Best chance of wet weather comes from a disturbance about April 24.<\/p>\n\n\n\n
DAYS 11-15 (APRIL 28 \u2013 MAY 2)<\/p>\n\n\n\n
The idea is for a similar pattern to continue, mostly west to east flow, but we do have to watch for rapid evolution of blocking pattern at any time. For now, overall idea is below normal temperatures and drier than average. Added pattern volatility potential from the interaction of a former western Pacific typhoon as its post-tropical remains interact with the jet stream heading into North America.<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (APRIL 18-22) It’s been a “slow improvement” weekend as we were expecting, and today will definitely be better than yesterday, but don’t expect full sunshine. With cold air aloft and yet another disturbance to pass by, we’ll still see lots of clouds at times, and possibly another passing rain shower or two. But … Continue reading Sunday April 18 2021 Forecast (8:11AM)<\/span>