The university will be closed Friday because of the frosty weather, Provost Nowell Donovan said in an e-mail Thursday evening.

Classes may be canceled, but Donovan urged students not to close their books.

“I would like to take this opportunity to correct a common spelling error by some students,” Donovan wrote. “The correct spelling of ‘snowday’ is actually ‘BOOKDAY’ – traditionally a time to extend the mind by comprehending the Fibonacci sequence and thus uncovering the mysteries of the Golden Ratio, by calculating phi to the millionth decimal point and by learning the details of the periodic table of the elements. If, in addition you can translate some Sanskrit texts you will have earned the right to build the largest snowfrog in the history of the University.”

The Dallas-Fort Worth area will be under a winter-storm-warning until midnight with an 80 percent chance of snow tonight, according to the National Weather Forecast Office in Forth Worth.

The weather Friday is expected to be cloudy during the day and partly cloudy at night with a high temperature in the upper 30s and a low in the lower 30s, according to the NWFO. Saturday will be mostly sunny with highs in the mid 50s and a low in the upper 40s Saturday night.