Vetus Meteoliner Anleitung Seite 36

How to use the gale warning
The baroscope can be programmed not only in line with purely
meteorological requirements, bat also so as to suit the user's per-
sonal requirements wherever he may be.
A warning function can only be
expected to do its job properly if it is
properly employed. The user who
sets a very low response tres-hold is
certainly being very cautious, but if
the result is that the alarm is con-
stantly going off, he will have taken
caution to absurd lengts - particularly
if people then start ignoring the alarm
or even turning it off.
Conversely, the warning threshold
should not be set too high either, as
the results could be equally undesir-
able - e.g. first gusting winds, and
only then the alarm. The user's faith
in the system would be shaken -
unfairly, of course.
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As you see, it is important to set the optimum response threshold
for the weather situation in question, and to take account of the
geographical area in which the Baroscope is being used. This
weather guide gives the correct threshold values for breezes,
strong winds and gales.
Pressure tendency
Geographical latitude Pressure tendency per hour (hPa/h), and wind
0 to 20 Only diurnal pressure movements (atmospheric tides), light
breezes or calms. Stronger wind only in squalls accompanying
showers and thunderstorms
20 to 40 Less than 0.5 hPa/h: no forecast possible
0.5 - 1.0 hPa/h:
1.0 - 2.0 hPa/h:
40 to 60 Less than 1.0 hPa/h: no forecast possible
1.0 - 2.0 hPa/h:
More than 2.0 hPa/h: Gale
60 to 80 Less than 1.0 hPa/h: no forecast possible
1.0 - 2.0 hPa/h:
2.0 - 3.0 hPa/h
More than 3.0 hPa/h: Gale
Pressure tendency: less than 1 hPa/h = negligible
less than 2 hPa/h = strong winds
more than 2 hPa/h = gale
Bft 4-5, risk of Bft 6 in some coastal locations
Gale
Bft 6-7, strong winds
Bft 4-5
Bft 6-7, strong winds
Baroscope