Over the next 48 hours, overnight lows will fall into the freezing range. Tonight, a freeze warning and frost advisory will go into effect at 3am and will expire at 9am Friday. For more on that visit: http://www.iowachase.com/freeze-warning-frost-advisory/. Even cooler weather will move into the state Friday night. The coldest spot will be across eastern Iowa, and this is where temperatures will fall into the mid 20’s to lower 30’s. A freeze watch has been issued for these areas from late Friday night through Saturday morning.
Any vegetation that is left uncovered overnight both tonight and Friday night will likely die. Warmer weather will then build into the state by Sunday.