* WHAT...For the Heat Advisory, heat index values around 105 or higher expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values near or exceeding 110 possible.
* WHERE...Portions of western into central and northern Iowa.
* WHEN...For the Heat Advisory, from noon Saturday to noon CDT Sunday. For the Extreme Heat Watch, from Sunday afternoon through Monday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.