Forecast discussion: A frontal boundary carrying low pressure areas from eastern Louisiana to northern Maryland will continue to give Boston more precipitation Friday evening. Rain showers, however, will meet with some colder air arriving behind a cold front already offshore. The rain will change over to a mix of wet snow, and mix in with a little sleet at times. It will change over north and west of Boston to start, before slowly changing over throughout the city. However, we will return to all rain showers by mid-morning on Saturday, before all the precipitation ends. We may see a coating of snow on the cars by dawn, but should quickly melt away.
High pressure in the Northern Plains will bring some drier air Saturday afternoon, and bring partly cloudy skies by Saturday evening. However, temperatures will also get colder, as high temperatures will only reach the lower 30’s.
The high will give way to a couple areas of low pressure developing over the Ohio River Valley and the coast of North Carolina. We will see increasing clouds Sunday night, with precipitation starting in the form of snow. However, some warmer air will arrive, changing the snow to a mix of sleet and freezing rain before the morning commute. So, we will see a wintry mix during the worst time to travel to work or school. So, please take extreme caution, and give yourself more time to arrive at your destination. At this time, we may see up to a half-inch of ice on the roads before the changeover to rain.
By the middle of Monday morning, the wintry mix will convert back to rain showers, as temperatures warm into the lower 40’s. The precipitation will end by around midnight, with skies remaining cloudy Monday night.
A new high pressure system will bring drier weather for the remainder of the week. But, it will be quite cold, as daytime temperatures will be near or below freezing Wednesday and Thursday. Temperatures actually climb above freezing by Friday afternoon.
72 hour forecast:
Tonight: Rain showers changing to a mix of wet snow and sleet around 3 a.m. with a low of 33.
Saturday: Sleet/snow mix changes to rain by the early morning before all precipitation ends by mid-morning. Partly sunny skies expected by the early afternoon. We will see a high of 40 with northwest winds at 9-12 mph.
Saturday night: Partly cloudy with a low of 23. Winds will come from the northwest at 7-10 mph.
Sunday: Mostly sunny during the daytime hours, with overcast skies by the evening. We will see a high of 34.
Sunday night: Light snow starting around 3 a.m. mixing with sleet before the morning commute. We will see a low of 27.
Monday: A mix of sleet, snow, and freezing rain through 11 a.m. before changing to all rain. We will see a high of 42.
Monday night: Showers end by around 11 p.m., but remaining mostly cloudy. We will see a low of 33.
Tuesday: Partly sunny. Highs 35-38, lows 21-24.
Wednesday: Mostly sunny. Highs 30-33, lows 16-19.
Thursday: Mostly sunny. Highs 27-30, lows 17-20.
Friday: Mostly sunny. Highs 34-37, lows 21-24.