A significant upper-air pattern change is going to take place this week across the CONUS that will have direct impacts on the sensible weather for North Texas. A series of shortwaves will carve out a substantial trough in the center of the CONUS this week, helping to break down the upper-ridge that is currently sitting on top of Texas over the holiday weekend. This ridge will ensure temperatures stay in the upper 90s to near 100°F through the middle of next week. The deepening trough and the dropping of the westerlies southward will help drive a significant cold front south into Texas by the last part of the week. This will increase rain chances for our area, bring in much cooler temperatures, and eventually drive drier continental air into the region. Behind the front, temperatures should plummet into the 80s for highs (possibly cooler depending on cloud cover and post-frontal precipitation) and into the low to mid 60s for overnight lows, especially after the effects of the drier continental air advects into the region. This is a sure sign the seasons are a changing!