The coldest air of the winter to date - by far - is moving in to Reading and North Reading on Wednesday.
Windchills are expected to be around 10 degrees on Wednesday morning and possibly below zero on Thursday morning, which will be the coldest day since last February.
The National Weather Service said that Wednesday evening's low temperature would be about 5 degrees and Thursday evening's low temperature will be about 19 degrees.
Thursday morning will be colder, but will not be as windy, according to WHDH Chief Meteorlogist Pete Bouchard in his most recent blog.
"And although Thursday morning is colder, there isn't a lot of wind," he said. "Sun will dominate the short term forecast too and afternoon highs will be manageable: mid and upper 20s."
The cold will not last forever. Forecasts call for the cold weather to end by the weekend and temperatures to be back into the 40s by next week. Bouchard said the "the deep freeze will be short-lived."