Hooks usually originate as low pressure systems that form east of the Rocky Mountains. As the upper level flow descends the Rockies’ eastern flank, the air warms by compression, and as it warms the pressure at the surface drops. The result is a phenomenon known as a lee side low. The lows that form in the lee of the towering San Juan range in southern Colorado become Panhandle Hooks or Texas Hookers. The above USGS weather map from 5 PM CT shows a classic hook front, extending from the Canadian border to the Gulf of Mexico. It will spawn blizzards and tornadoes all at the same time.