The National Weather Service says this this the last day (for a while) of the HEAT and HUMIDITY today across central and southern Iowa. High temperatures rise back into the 90s with heat index values over 100 degrees this afternoon can be expected. A HEAT ADVISORY is in effect until 7-p.m. for Cass-Adair-Adams-Audubon-Guthrie-Dallas-Madison-Union-Taylor and Ringgold Counties. A cold front sneaks into northern Iowa this afternoon, providing the focus for thunderstorms to develop. A few strong thunderstorms are possible in this location today, with the main threat of large hail and damaging winds. Heavy rain is also likely with the storms late this afternoon into the evening leading to the flash flood potential. An active weather pattern is forecast throughout the work week. Stay tuned for further updates.