Rain and temperatures in the mid-50s expected Saturday; cooler, sunnier on Sunday

The polar vortex has finally left the region, but not before giving us one goodbye gift: a touch of snow.

Light snow began falling early this morning and was expected to continue into the afternoon in some areas, with Southeastern Massachusetts getting up to an inch of accumulation, forecasters said.

Multiple single-vehicle crashes on the Massachusetts Turnpike caused by the snow snarled traffic this morning, but no injuries were reported, State Police said.

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The snow is expected to change to light rain as temperatures rise into the upper 30s this evening.

Soaking rain showers are expected to start as early as 1 a.m. Saturday, continuing into the early morning hours. Patchy fog is expected until 4 p.m.

“If there’s still snow on the ground, that fog could be pretty dense,” said National Weather Service meteorologist Alan Dunham.

Temperatures will be unseasonably mild, with a high at 57 degrees, and are only expected to drop into the low 40s overnight.

The rain will let up at mid-morning, but return with a vengeance. Soaking rain will drench the area by 7 p.m. — just in time for the Patriots playoff game in Foxborough. One to two inches of rain could fall by midnight.

“When it’s all said and done, Eastern Massachusetts could get an inch to an inch and a half, and Worcester County could get anywhere from an inch and a half to two,” Dunham said.

A wind advisory might be issued for Saturday night, as wind gusts could increase to 40 miles per hour by 8 p.m.

Showers will continue until 2 a.m. Sunday as those winds start to calm, dropping up to another inch of rain onto the region.

The rest of Sunday will be dry and mild, with clear skies and highs in the mid-40s. Gusts as high as 32 miles per hour will subside by the evening, with temperatures dropping into the mid-30s.

Mild and dry conditions should continue into early next week, and temperatures should stay above 40 degrees through Wednesday.

“It’s finally going to be warm — relatively speaking, of course,” Dunham said.