Active AlertsMerrimac, MA

Temperatures are falling below freezing, allowing wet surfaces from earlier precipitation to refreeze. This may result in patchy areas of black ice, especially on untreated roads, as well as bridges, overpasses, sidewalks, and parking lots. Motorist and pedestrians should use caution heading out tonight and during the Thursday morning commute, as some surfaces may appear wet but could be slick. Conditions improve midmorning as temperatures rise above freezing.