You’re pulling the value of just the variable Beaufort right?
If so, go though and add something to display the values of Beaufort, your speed, and the dictionary value it is checking against on each loop iteration. Then display the value of Beaufort at the very end of the shortcut.
Beaufort should be updated with the new index value when it is greater than the associated windspeed. i.e. it is only ever set equal to a single integer value at any time.
I can’t immediately see anything from the screenshots or what you should have applied that could indicate why Beaufort should contain what sounds more like a dictionary or concatenation of multiple results, rather than a single integer.