Unseasonal warmth will be followed by below-normal chill as arctic air reaches the Triangle from the Upper Midwest and holds daytime highs and overnight lows below normal.
The National Weather Service predicted highs of about 69 degrees on Tuesday and 72 on Wednesday, but then 50 on Thursday, 45 on Friday and 48 on Saturday.
The average high for this part of November is 64 to 65 degrees.
At night, readings should run several degrees above the normal of about 42, then sink to 32 degrees on Friday morning and 23 on Saturday.
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The cold air that is pressing south accompanied a storm system that dropped between a few inches and more than a foot of snow on Montana, North Dakota and Minnesota on Monday.
That system will not drop south, and the Triangle’s cold should be dry, forecasters said.