CHARLOTTE, N.C. (WBTV) - We have one more day of sunshine to enjoy before showers and thunderstorms heading our way. First Alert Tue.-Wed.: Heavy rain at times. After a gorgeous weekend, we are going to cool down into the 30s and 40s later tonight. With mostly clear skies and light winds, areas north of Charlotte could wake up to some frost by Monday morning. The rest of our Monday looks great, with plenty of sunshine and highs in the upper 60s and lower 70s.