It will be another chilly and frosty night for parts of the Heartland. Lows will dip into the 30s and lower 40s from north to south. Friday looks a touch warmer with highs in the upper 60s to lower 70s. There is still a tiny chance for a couple isolated showers on Saturday, but most of the Heartland should remain dry for weekend plans. Sunday night into Monday a strong cold front will bring widespread showers and thunderstorms. Severe weather is possible, especially if the front slows down and moves through the Heartland later in the day on Monday.