Heading into this weekend we are expecting a cooling trend, with highs on Friday 5 to 10 degrees cooler than what is expected for the middle part of this week. A reinforcing shot of cooler air will arrive sometime on Saturday, bringing morning lows in the 30s for North and Central Texas on Sunday morning and highs near average: in the upper 50s and lower 60s. Most will remain dry this weekend, though a few isolated rain showers can't be ruled out for portions of East Texas.