Columbia subject headings:
Climatology--Research.
Mesometeorology--Research--United States.
Meteorology--Research--United States.
United States--Climate--Observations.
Weather--Observations.
Harvard subject headings:
Climatology--Research
Mesometeorology--Research--United States.
Meteorology--Research--United States.
United States--Climate--Observations.
Weather--Observations.
Princeton subject headings:
Climatology--Research.
Mesometeorology--Research--United States.
Meteorology--Research--United States.
United States--Climate--Observations.
Weather--Observations.