CAPE GIRARDEAU, MO (KFVS) - After more than a month of extremely hot and humid weather, a significant pattern shift is expected to bring a bit of welcome relief to the nation's midsection during the upcoming week.
During all of July and early August a very strong jet stream-level high pressure system has been parked over the plains, resulting in hot and mostly dry conditions.
Last week several areas recorded some of the highest localized temperatures on record, including an official all-time high of 114° at Little Rock, Arkansas.
During the upcoming week, however, the upper level ridge is expected to begin to shift slowly westward. This will allow slightly cooler and less humid air to begin to blow into the Heartland from the north by about Tuesday.
The remainder of the week the Heartland will likely see afternoon highs in the 80s and morning lows in the 60s. Lower dew point temperatures will mean significantly lower heat index values as well.
Early forecasts show the more moderate pattern may persist into the week after as well.