Rawinsonde (RAOB) Data Archive
The IEM proceses and archives Rawinsonde (RAOB) data made available on the rucsoundings.noaa.gov website. This archive also contains data from other sources to backfill it to the 1940s. Data for the United States and Canada is available. This data are vertical profiles of the atmosphere taken from weather balloons released twice daily.
- List Sounding Parameters per Year
- View Sounding Percentiles (Autoplot 150)
- Sounding Monthly Min/Max values (Autoplot 198)
- Sounding Yearly Timeseries (Autoplot 212)
- SPC Sounding Climatology Page
This form provides a simple comma delimited file of RAOB data, the columns should be self-explainatory except the 'levelcode' column. Those values provide metadata on that level of data. The start time is inclusive and end time is exclusive. Special soundings should be in this archive as well.
Output Datafile Columns
station 3 or 4 character station identifier validUTC RAOB Launch Cycle Time in UTC levelcode Level Code for this observation pressure_mb Pressure of data in millibar height_m Height above sea level m tmpc Air Temperature in C dwpc Dew Point Temperature in C drct Wind Direction in deg from North speed_kts Wind Speed in knots bearing Balloon bearing in degree range_sm Ballon range from launch in statute miles
A jsonp webservice exists that currently emits one RAOB profile at a time provided a site and valid timestamp in UTC. Please visit the IEM JSON Services for more details. For the impatient, the example URI is: