Final answer:
Storms below the 30°N latitude line typically move from west to east, while above this line storms also tend to move from west to east depending on the jet stream and pressure systems.
Step-by-step explanation:
To mark the 30°N latitude line on a map, locate the horizontal line on the map that represents 30 degrees north of the equator. For storm movement below this line, it generally depends on the pressure systems in place, but in the Northern Hemisphere, storms typically move from west to east, due to the prevailing westerly winds. Above the 30°N latitude line, storms can also move from west to east, but this can be influenced by the jet stream's position and other factors including high and low-pressure systems.
The storms below the 30°N latitude line generally move from east to west. This is because the trade winds blow from the east, pushing the storms in a westward direction. Above the 30°N latitude line, the storms generally move from west to east. This is due to the prevailing westerlies, which blow from west to east in this region.