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Modeling in Google Earth, Google Maps, and Adobe Flash diagrams for the Atlantic, East Pacific, and Central Pacific basins.
Our decoder is coded based mainly upon specifications contained in the National Hurricane Operations Plan with additional information coming from the Federal Meteorological Handbook No. 3 (FCM-H3-1997) and the World Meteorological Organization's Manual of Codes (WMO-No. 306, Vol. I.1). This decoder does not try to decode a product that is corrupt. (Meaning it is missing data it normally should not.) It is likely that I have not accounted for all possibilities for valid products. I will work on those instances when I become aware of them.
Mapping more than a few HDOB messages (which usually contain 20 coordinates for each message) may cause your browser to lock up if you do not have a lot of memory available. It is recommended that you plot no more than 3 messages at a time if you have an old computer. This decoder also has support for the East Pacific and to some extent other areas in the Pacific, though more features are available for reconnaissance flights in the Atlantic basin. It should also be noted that this decoder was designed to decode all messages and observations, even ones that are not tasked as tropical. This decoder was built to be versatile. Try to throw several messages into the box and see if they can be decoded. If you have a product you cannot decode correctly, please send the message to us or tell us where to find the product that could not be decoded.
For wind direction, the page found here is used to denote "nice" wind direction from the bearing in degrees.
Check out the NHC recon archive to view old recon reports.
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