PHost now supports ion storms. This was the last major HOST feature lacking in PHost. Our storms use similar rules than HOST's, but not identical.
Ion storms are a natural phenomenon that affects ships, to the good or worse - much like meteorites which affect planets.
If you want to use ion storms, set IonStormActivity to a value other than zero (5 is a common choice in the HOST world). The default is zero which means no ion storms. PHost automatically creates, manages and destroys ion storms, there's no need to modify your game mastering process.