You can find either the Global or Hurricane presets through the world map (free flight) or whilst in flight through the 'weather' icon.
Each of the storms included are in the ‘Weather Preset’ section. From the World Map menu, click on the ‘Flight Conditions’ box and then click on ‘Preset’ in the weather area. You will then see a number of new presets. Those installed with STORM will start with ‘STM-’ followed by the name of the storm.
Hurricanes and other storms (not the global presets) will list the name of the storm, the year of the storm and a nearby airport. Note that the airport listed may be up to 1000nm away from it.
You will also be able to change the storm from within your flight by using the in-sim tool bar to access the weather.