Enjoy the mild weather today, with highs generally in the 40s and 50s, because the door will slam shut on warm (or even seasonal) for the rest of the coming week. A cold front will cross Iowa early Sunday morning, followed by light snow on Sunday night with most of the state seeing less than an inch of accumulation. Thereafter, very cold weather is forecast through Monday and Tuesday, with near-record low readings for the season forecast. On Monday blustery north winds of 10 to 20 mph with some higher gusts will result in wind chill values remaining in the single digits to lower teens right through the day. On Tuesday morning actual temperatures will dip below zero across parts of northern Iowa and into the single digits above over most of the rest of Iowa. A slow, but modest, warming trend is then anticipated in the latter half of next week.