For the jet stream to be so successful, it takes a big storm to get ready somewhere, is not it? Surprisingly, it is the opposite (the closest thunderstorm that is developing is in the western Gulf of Mexico on Tuesday). Storms bend the jet-stream into a ridge and dive into the waves that pass through the Lower 48. Just like twisting a garden hose, the flow rate decreases. In the absence of large-scale weather systems, a west zoning jet is free to gain considerable speed, a little in the way of reaching the fastest speeds on freeways.