Fiction by Jenna Blum.
https://www.barnesandnoble.com/
I don't know anything much about stormchasing, except what I gleaned from watching the movie
Twister twenty years ago. Generally I figured that stormchasers must be crazy people, to be honest. It was interesting to learn a bit about the subject in this story.
In this book, Charles and Karena are a pair of boy/girl twins in their thirties with a history of obsession with storms, although in different ways. He loves chasing them and she is terrified of them, and the two are estranged. Karena longs to find Charles and repair the rift between them, but it seems that Charles may not want to be found.
This was a great story about these characters and their complicated relationship. along with some excitement from the stormchasing. Good book!
I also read by this author:
Those Who Save Us