After Another Steamy Night, Thunderstorms Return for Tuesday

Heat index values of 105 to 109 will persist this afternoon, but an approaching weak cold front will induce isolated showers after midnight, then scattered thunderstorms with its passing Tuesday morning. Lingering post frontal instability keeps shower chances in the forecast through Tuesday night, but the heat returns as dominant through the end of the work week. A weak tropical wave arrives over the weekend, bringing scattered showers and thunderstorms Saturday that diminish to isolated before ending on Sunday. Temperatures will be 3 to 5 degrees above normal for this time of year. The Atlantic Basin tropical activity is very quiet.