...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT SUNDAY... .TONIGHT...Mostly cloudy. Showers likely with a chance of thunderstorms this evening, then a chance of showers and thunderstorms after midnight. Some thunderstorms may be severe this evening. Lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 60 percent. Heat index values up to 109 early this evening. .SUNDAY...Mostly cloudy in the morning, then becoming mostly sunny. Hot with highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 109 in the afternoon. .SUNDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the mid 70s. South winds 10 to 15 mph, becoming southwest 5 to 10 mph after midnight. Chance of rain 20 percent. Heat index values up to 107 early in the evening. .MONDAY...Sunny. Highs in the mid 90s. North winds 5 to 10 mph with gusts up to 20 mph. .MONDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 70s. East winds 5 to 10 mph. .TUESDAY...Mostly sunny. Highs around 90. .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 and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 30 percent. .THURSDAY...Partly sunny. A chance of showers in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .THURSDAY NIGHT...Showers likely in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 60 percent. .FRIDAY...Mostly sunny. Highs in the upper 80s. .FRIDAY NIGHT...Mostly clear. Lows in the mid 60s. .SATURDAY...Sunny. Highs in the upper 80s. -- This email has been checked for viruses by AVG antivirus software. www.avg.com