Days of a seasonal summer forecast turn to dust by the weekend

HARLINGEN, Texas (ValleyCentral) -- The Rio Grande Valley is riding on a series of seasonal days through the week and into the weekend. Seasonal, in this case, means lots of sun, southeast breeze, and daytime highs in the 90s. Humidity will be noticeable but tolerable leaving the daily heat index between 100 and 105 degrees [...]