After a 10-plus rated weather day across all of Southern New England, clouds are expected to be on the increase Tonight as a frontal boundary pushes eastward across the central and eastern Great Lakes. Showers will overspread all of Western and Central Mass very late tonight. Low temperatures tonight will be near 65 Degrees. Sunday: A round of showers are expected during the morning with a round of showers and thunderstorms expected during the mid and late afternoon hours. There should be about a 4 to 6 hour break or so between the two rounds. Showers will move across Western and Central Mass throughout a good part of the morning on Sunday. The air mass is expected to be humid and thus some heavy rainfall looks likely with some of these showers. This first round of showers will push out of the area by about 10 am to midday or so and there should be a break in the rainfall during the early afternoon hours. A round of showers and thunderstorms, associated with the actual frontal system, will push into Western Mass by about 3-4 pm or so and then into Central Mass by about 4-5 pm or so. How unstable the air is will depend on whether we see any breaks of brief sunshine during the early afternoon hours. I think that Western Mass has the greater chance of seeing a more unstable environment and thus a greater chance of a few strong to severe thunderstorms. Any strong to severe thunderstorms will be capable of producing wind gusts of up to 50-60 mph, frequent lightning and very heavy rainfall. The shower and thunderstorm activity is expected to end by 6-7 pm or so on Sunday evening. High temperatures Sunday will be between 75 and 80 Degrees with humid conditions. Monday looks partly sunny, very warm and humid with high temperatures near 85 Degrees. Areas along and north of Route 2 might have to watch for a late afternoon shower or thunderstorm. The rest of Western and Central Mass is currently expected to stay dry on Monday.
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