
We use ISD data to complement and backfill for our METAR archive. The Integrated Surface Database (ISD), maintained and published by NOAA's National Center for Environmental Information, consists of hourly and synoptic weather reports from a variety of sources. We have been collecting and archiving published METAR reports since 2011, and have found third-party sources for archived reports from years prior to that. They are published via radio transmission and on the internet. Such reports are used by pilots, air traffic controllers, meteorologists, climatologists, and other researchers.

This report graphically illustrates the historical weather reports recorded by the weather station at Detroit City Airport in 2008.Īirport weather stations throughout the world routinely issue METAR weather reports.
