The National Weather Service has issued a frost warning for Sunday night, Oct. 27, as temperatures are expected to drop into the upper 20s and lower 30s across the region. The cold front that passed through the region earlier this morning brought cooler, drier air, which will persist into the night. Winds will begin to ease after 3 a.m. Monday morning, with high pressure building over the region, leading to mostly clear skies and light winds.