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Local Climatological Data (LCD) contains summaries from major airport weather stations
that include a daily account of temperature extremes, degree days, precipitation amounts
and winds. Also included are the hourly precipitation amounts and abbreviated 3-hourly
weather observations. This is the final quality controlled copy and generally has
a one to two month time lag. The local climatological data annual file is produced
from the National Weather Service (NWS) first and second order stations. These data
are contained in the LCD monthly and annual publications. The monthly summaries include
maximum, minimum, and average temperature, temperature departure from normal, dew
point temperature, average station pressure, ceiling, visibility, weather type, wet
bulb temperature, relative humidity, degree days (heating and cooling), daily precipitation,
average wind speed, fastest wind speed/direction, sky cover, and occurrences of sunshine,
snowfall and snow depth. The annual summary with comparative data contains monthly
and annual averages of the above basic climatological data in the meteorological data
for the current year section, a table of the normals, means, and extremes of these
same data, and sequential table of monthly and annual values of average temperature,
total precipitation, total snowfall, and total degree days. Also included is a station
location table showing in detail a history of, and relative information about, changes
in the locations and exposure of instruments. The NCDC also archives a Preliminary
Local Climatological Data manuscript that contains similar information, but is not
quality controlled. |