Heat Advisory issued June 19 at 1:31PM MDT until June 20 at 9:00PM MDT by NWS

…HEAT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT MONDAY… * WHAT…Heat index values up to 105 expected. Overnight heat index above 75 degrees possible. * WHERE…Charles Mix, Beadle, Brule, Douglas, Jerauld, Sanborn, Gregory, Aurora and Davison Counties. This includes the Tribal Lands of the Yankton Sioux Tribal Nation.