If you are in the path of a storm you should be listening to official information sources. The data presented at this site have no official status and should not be used for emergency response decision-making under any circumstances. Storm tracks are plotted after the new forecasts are received. The track color indicates the maximum sustained wind at that point in the track. The wind speed can be determined from the scale in the lower left corner of the map.
Solid tracks are the past history of the storm, while dotted tracks show the current forecast.
The current position of a storm is shown with an arrow indicating the storm's current direction of motion. The arrow is color coded using the maximum sustained wind, just like the track. If you are in the path of one of the storms, you should be listening to official storm information. This UNofficial data is drawn from operational warnings and may not agree with the best track information available after the storm is over. Problems can arise when My machine is down and cannot process the tropical advisories.