These files contain monthly observational data that have been quality-controlled using semi-automated computer programs as well as oversight by our staff. The filenames are prefixed with a label identifying one of three different observation intervals - ten minute (10min), one hour (1hr), and...

The Reader three-hourly observation data are composed of the nearest valid instantaneous observation within 40 minutes of the synoptic reporting times (i.e., 00, 03, 06, 09, 12, 15, 18, and 21). These data are uncorrected for the years 1980-1990, gross error checked for 1991-2000, and quality...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...

These files contain instantaneous observations at ten-minute intervals, with either six or eight columns. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within...