The tropical cyclone data presented here are intended to convey only general information on current storms and must not be used to make life or death decisions or decisions relating to the protection of property: the data may not be accurate. 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.
Tropical storm forecasts are automatically updated every 3 hours at approximately 00:30, 03:30, 06:30, 09:30, 12:30, 15:30, 18:30, and 21:30 UT from advisories received from the National Hurricane Center, the Central Pacific Hurricane Center, and the Joint Typhoon Warning Center.
Storm tracks are plotted after the new forecasts are received. All plotted times are UT (GMT). 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 color coded 'X' shows the location of the forecast which is the furthest prediction into the future (it does not represent the termination of the storm, just the furthest extrapolation of the storm's position). 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. The numbers along the track (like 17/1500) give the date and time of the data (UT), e.g. 17/1500 is the 17th of the month at 15:00 UT.
I try to keep the forecast data as up-to-date as possible, but there are a number of reasons why data could be missing or, worse, erroneous. So don't take it too seriously, particularly if you are in the path of one of the storms! 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. It is possible that a storm may be missing from my database: when the text says "No current tropical cyclones", that really means none that my machine knows about.
Problems can arise when
comments to Tom Metcalf, metcalf @ akala.ifa.hawaii.edu