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10.4.2 Apparent Temperature (AT)
AT
is a linear regression that is not restricted, and is more
appropriate to outside conditions because it includes wind, and
was intended as an assessment of what exposed body
surfaces feel like in cold, windy conditions.
Regression equations of this universal scale are formulated for
indoors, outdoors in shade but exposed to wind, and outdoors
exposed to wind and solar radiation. Of these, outdoors in
shade but exposed to wind, has been chosen as most
informative.
10.5 Pressure Threshold Setting
The pressure threshold (the negative or positive rate of change
of pressure signifying a change in the weather) can be
adjusted from 2 hPa to 4 hPa (default level 2 hPa).