The data used to generate this site's forecast track images are in a compressed comma-separated value format that is not straightforward to use. To aid end users who wish to incorporate these data into their own dynamic maps, we convert these data into Google's Keyhole Markup Language, or KML, format. These KML files are configured to depict each model's track as a distinct line and each twelve-hourly point along the track as a distinct point that includes position and intensity information.

KML-formatted "early" track guidance data for the most-recent model cycle are available from the "KML Output" option in the drop-down menu for each active storm on the website's front page. The corresponding KML-formatted "late" and ensemble track guidance data for the most-recent model cycle, as well as archived KML-formatted track guidance, are available in each storm's archive. This archive can be accessed through the "Archived Maps" entry in the drop-down menu for each active storm or from the site-wide archive linked in the navigation menu above.

You are welcome to download and import these files into Google Maps, Google Earth, or any other program that accepts KML files as input for personal use. All other uses - such as using them to drive a real-time display on your website - require approval. We typically allow such uses so long as credit is given, but please contact us with your proposed use case to learn more.