A ridge of high pressure aloft, will begin to ease back eastward tomorrow, which will mean a return to hot and dry conditions for most of this week. However, our weather pattern is forecast to undergo a significant change that is rather unusual for this time of year. The upper ridge of high pressure, may be replaced with an upper-level trough of low pressure over much of the eastern part of the U.S., including the lower Mississippi River valley over the weekend. Consequently, a cold front is forecast to move through on Saturday, giving us a decent shot at showers/storms. In the wake of the front, drier and cooler air should invade, resulting in high temperatures only in the upper 80's and low's in the upper 60's for late in the weekend into early next week.