What makes thunderstorms go "backwards"?

[Remodeling Maidiac]

Just got off work, sitting on the deck and the clouds are flying west ROAD RUNNER style. Lots of thunder and a big temp drop. Usually this stuff comes in from the west, south west. But now it's going northwest

 

[Turtlesoup]

Just got off work, sitting on the deck and the clouds are flying west ROAD RUNNER style. Lots of thunder and a big temp drop. Usually this stuff comes in from the west, south west. But now it's going northwest

A front pushing the storm.

 

[progressive hunter]

Just got off work, sitting on the deck and the clouds are flying west ROAD RUNNER style. Lots of thunder and a big temp drop. Usually this stuff comes in from the west, south west. But now it's going northwest

I would think holding up a picture of nancy pelosi up in front of it would make it change course,,

 

[Remodeling Maidiac]

A front pushing the storm.

The Jetstream goes from west to east. This crap is flying west like its late for a party

 

[idb]

Just got off work, sitting on the deck and the clouds are flying west ROAD RUNNER style. Lots of thunder and a big temp drop. Usually this stuff comes in from the west, south west. But now it's going northwest

Ya made me Google!!!

While the jet stream generally flows from west to east, it is often distorted with northward bulges and southward plunges.
Meteorologists call the northward bulge a ridge and a southward plunge a trough.

On rare occasions, usually during major winter storms such as a blizzard, the jet stream may bend so much that it flows from east to west over short distances. When this happens, the jet stream may break off (close off) from the main branch and spin counterclockwise in a large horizontal circle.

It was a large buckle in the jet stream that developed and created an east to west flow over the mid-Atlantic states during late October 2012. This flow helped to pull Superstorm Sandy onshore over New Jersey on Oct. 29.

https://www.accuweather.com/en/weather-news/what-are-jet-streams-and-how-do-they-influence-the-weather-we-experience/433431