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Integrated Global Radiosonde Archive


Weather balloon launch
Photo courtesy of National Weather Service

The Integrated Global Radiosonde Archive (IGRA) consists of radiosonde and pilot balloon observations at over 1500 globally distributed stations (Figure 1). Observations are available for standard, surface, tropopause and significant levels. Variables include:

  • Pressure
  • Temperature
  • Geopotential Height
  • Dewpoint Depression
  • Wind Direction
  • Wind Speed
The period of record varies from station to station, with many extending from 1970 to present (Figure 2). Station records are updated daily and are available online at no charge.
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Last Updated Wednesday, 20-Aug-2008 12:09:11 EDT by
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