High pressure building in tonight will allow for a chilly night with lows in the mid 30s or a touch cooler, especially over interior northern Lower Michigan where a frost advisory is in place…as skies clear and winds go light. A weak wave slipping by Sunday could bring a shot at rain showers late in the day into Sunday night, though it will otherwise be a warmer day with highs in the 60s to low 70s. Increasingly warm weather is then expected going into the first half of the work week and perhaps beyond.