A Storm druid has a 2 FPs (focus points) initially. They get +1 FP from the Wind Caller feat, and another +1 FP from the Invoke Disaster feat, for a total of 4.
However, according to the Druidic Order feature, your focus pool can never hold more than 3 points. Thus, the +1 FP from Invoke Disaster is impossible.
Why does the Invoke Disaster feat increase your FP?
