Much of Massachusetts will be under a freeze, frost or flood warning overnight Thursday as the coldest air so far this season arrives via a high pressure system, according to the National Weather Service.

Widespread frost is expected, and many communities further inland are predicted to see freezing temperatures, the weather service said. Coastal areas, Cape Cod and Nantucket are the only regions not expected to experience frost.

Temperatures are predicted to reach their lowest point around sunrise on Friday, which will occur shortly before 7 a.m., according to the weather service. Both the freeze warning and frost advisory go into effect at 11 p.m. Thursday and end at 9 a.m. on Friday.

The freeze warning affects all of Berkshire, Bristol and Hampden Counties, as well as eastern Ham

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