The National Weather Service has placed Kiowa County under a heat advisory for Sunday, when forecasters expect temperatures of 100 to 105 degrees from 10 a.m. to 9 p.m. Kiowa County is one of a dozen Colorado counties drawn into a heat event that stretches well beyond the state line. Image © iStock - XurzonA heat advisory is the weather service's mid-level heat product. Weather service policy directs local offices to set heat criteria for their own climates, so the two regions are being measured with different yardsticks. Counties along the Colorado border served by the Goodland office — including Sherman, Wallace and Greeley — were under a heat advisory Saturday with heat index values up to 110.