Get ready for a windy brisk day followed by a biting cold night, with wind chill readings in the 20s and low 30s.

The National Weather Service has issued a wind chill advisory through Thursday morning, in effect saying: Bundle up.

All the frigid air is the result of a strong cold front passing through South Florida this morning. Today’s forecast calls for partly sunny skies, highs in the low to mid 60s and wind gusts up to 18 mph.

Tonight, temperatures are expected to plunge into the low 40s in Broward and Miami-Dade counties and the upper 30s in Palm Beach County.

Thursday is forecast to be sunny and cool during the day, cold again at night. Conditions should gradually warm on Friday.

By the way, if you think it’s cold here, temperatures are forecast to fall into the mid to upper 20s in Central and North Florida tonight.

In other news: 2010 tied 2005 as the warmest year on record worldwide, since 1880, the National Oceanic and Atmospheric Administration reported today. For the United States, it was the 23rd warmest record.