...HEAT ADVISORY IN EFFECT FROM NOON SATURDAY TO 8 PM CDT SUNDAY... .TONIGHT...Mostly clear. Lows in the upper 60s. South winds 10 to 15 mph. .SATURDAY...Mostly sunny. Much warmer. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 102 in the afternoon. .SATURDAY NIGHT...Mostly cloudy. A slight chance of showers in the evening. Humid with lows in the mid 70s. South winds around 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .SUNDAY...Mostly sunny. Hot with highs in the mid 90s. South winds 15 to 20 mph with gusts up to 30 mph. Heat index values up to 103 in the afternoon. .SUNDAY NIGHT...Mostly clear. Humid with lows in the lower 70s. South winds 10 to 15 mph. Heat index values up to 102 early in the evening. .MONDAY...Sunny, hot with highs in the mid 90s. .MONDAY NIGHT...Mostly clear. Lows around 70. .TUESDAY...Partly sunny. Highs in the lower 90s. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. .WEDNESDAY...Mostly sunny. Highs in the lower 90s. .WEDNESDAY NIGHT...Mostly clear in the evening, then partly cloudy with a chance of showers after midnight. Lows around 70. Chance of rain 30 percent. .THURSDAY...Partly sunny in the morning, then clearing. Highs in the lower 90s. .THURSDAY NIGHT...Mostly clear. Lows in the upper 60s. .FRIDAY...Sunny. Highs in the upper 80s.