A visul aid to how jet streams move click below
Weather Model - Asia Jet Stream Wind and 250 mb Pressure (STORMSURF)
Here is a jet stream visual aid , here you can see how different jet streams are moving about in Asia , and these jet streams follow a universal NON CHANGING , pattern
But normally if thru artificial minipulation , lets say in Britian there is a HAARP station British Agent Camron gave ok for HAARP operations , and the jet stream was heated its path would be artificially minipulated
And you can obviously run the simulators to determin how the path of the jet stream would be minipulated , and the effects of the HAARP induced weather last for days and weeks ....
Or you can also minipulate the weather layer from SPACE like I stated US launched a mystery UAV in space and yes you can also heat the atmosphere from a temporary station in space
All you need to do is send in enough energy pulses and you change the path of jetstream