If you thought Northwest Louisiana was simply dealing with another stretch of August heat, NOAA says there may be a bigger problem developing. Shreveport and Northwest Louisiana could be facing as many as 15 days straight of triple-digit heat as a powerful weather pattern settles over the ArkLaTex. A Heat Advisory is already in effect across the Shreveport forecast area through Friday evening, with some locations expected to reach heat index values around 105 degrees. Get our free mobile appFor Northwest Louisiana, the takeaway may be that the thermometer is only part of the story. The next couple of weeks may tell us whether this becomes simply a memorable heat wave or the beginning of a much drier end to summer.