Everyone in this part of the world eventually learns the subgenre of “fire weather,” a phenomenon that comes with dry air and high winds. Even the slightest spark, from whatever source, suddenly turns into a Major Blaze, and if the conditions are going to persist for a while, you’re likely to see a burn ban.
I was never quite sure how they actually quantified it, but this NWS graphic reveals the scale:
— NWS Norman (@NWSNorman) January 30, 2016
I’ve been here about forty years, and I don’t remember “historic” being used in this context. Which is probably a good thing.
The standard NWS term for those Texas counties is “Western North Texas,” the sort of description you’d need in a place the size of Texas; if you say “northwest Texas,” I start thinking the Panhandle and Amarillo.