ADDS - Aviation Digital Data Service
| ADDS - METARs Help Page (1 of 5)
Back to METARs Page OR METARs help
What are METARs?
- The next
page tells more about METARs and how they are presented on ADDS.
More information on METARs is provided by the National
Climatic Data Center (NCDC).
The METARs Page contains 3 major sections.
- The first bullet contains a link to another web page containing a
Java Applet which allows users to zoom interactively to the region of
their choosing and to interrogate the station icon for the full raw
METAR text. This has the highest complexity and is therefore the
slowest but is the most valuable if interactive data browsing is
- The second bullet is an imagemap containing links to GIF images
which are pre-generated and ready for viewing. They are
re-created every hour about 13 minutes past the top of the hour.
These plots depict temperature, dewpoint, wind speed and direction,
and any reported weather conditions (rain, snow, fog, etc.). Symbols
are used whenever possible to reduce the clutter on the plot.
- The third bullet contains a method for obtaining the latest
surface weather information by accessing raw text METARs. Accessing
raw METARs for specific stations is accomplished using the FORM and
entering the 4-letter ICAO station identifier. This should
retrieve the most recent observation for the requested station(s).