About the Data

Surface data before 1998 was obtained and assembled by John Cortinas and Chris Robbins by merging two surface datasets from the National Oceanic and Atmospheric Administration/National Climatic Data Center (NOAA/NCDC) (DATSAV2 and TD-3280) into a single format. Since that time, the data comes from the operational datastream archived by the NOAA/Storm Prediction Center. Upper-air data before 1998 comes from the North American Radiosonde database created by the Forecast Systems Laboratory, Boulder, Colorado. More information on this dataset can be found at FSL/NCDC Radiosonde Data Archive web site. Upper-air data since 1998 comes from the operational datastream archived by the NOAA/Storm Prediction Center.