A large and intensifying low pressure area will continue to move east Saturday. This will pull down colder air from the north and change the rain and mixed precipitation to snow before it ends later this afternoon. There will be some accumulation, especially on existing snow and non-dark surfaces.

For a while Saturday morning and early afternoon the snow will come down quite hard, especially north and northeast of Boston. Another 1 to 4 inches of snow is possible from Boston northward and then west to around Worcester. South of this area, a coating to a couple of inches is possible. This would bring the total snowfall close to the predicted totals in many areas.

The snow will have a difficult time sticking on the main roads and other areas where there is consistent traffic.

Notice the blue area (snow) moving into Boston during this loop. This is the change to snow. (Courtesy Weatherbell Analytics)

Skies will clear overnight and Sunday and Monday both look like nice sunny days with seasonably mild air. Highs will reach the 40s and much of the snow will be melting. A new storm approaches for Tuesday with more rain. This wet period is helping our drought tremendously and some areas will likely be fully out of drought status in a week.

Total snow accumulations expected including Friday night and Saturday. (Dave Epstein/WBUR)

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Saturday: Snow, mixed precipitation and rain. Precipitation changes to snow before ending late in the day or in the evening. Highs in the low 40s.

Sunday: Mostly sunny and cool. Highs 43-48.

Monday: Sunshine and seasonable. Highs in the mid-40s.

Tuesday: Rain develops. Highs in the lower 40s.