Hazy skies over the Valley: Here’s what to know 

HARLINGEN, Texas (ValleyCentral) — You may have noticed hazier than usual conditions across the Valley today and a temperature inversion is to blame. So, what is a temperature inversion? Under normal conditions, the air gets cooler as you go higher in the atmosphere. That temperature drop allows warm air near the ground to rise and mix out. But during a temperature inversion, a layer of warmer air sits on [...]