We start the week clear and cool, with some patchy clouds this afternoon and the possibility for a few areas of frost overnight. Temps warm for mid-week, and humidity will gradually increase as south wind transports Gulf moisture into the plains. By late this week chances for rainfall return, with an outside chance Thursday night and a better chance on Friday afternoon and evening, including a possibility of some severe weather. If the system slows down much, we could see rain chances extend into Saturday.