Barometric Pressure - Bresser 4Cast XL WIFI Weather Center Bedienungsanleitung

6 Strong breeze
7 High wind
8 Gale
9 Strong gale
10 Storm
11 Violent storm
12 Hurricane force

4.3.9 BAROMETRIC PRESSURE

The atmospheric pressure is the pressure at any location of
the earth caused by the weight of the column of air above it.
One atmospheric pressure refers to the average pressure and
gradually decreases as altitude increases. Meteorologists use
barometers to measure atmospheric pressure. Because absolute
atmospheric pressure decreases with altitude, meteorologist
correct the pressure relative to sea-level conditions. Hence, your
ABS pressure may read 1000 hPa at altitude of 300m, but the
REL pressure is 1013 hPa.
To obtain accurate REL pressure for your area, consult your local
official observatory or check weather website on Internet for real
time barometer conditions, and then adjust the relative pressure
in SETUP (section 6.4.1)
4.3.9.1 ABSOLUTE OR RELATIVE BAROMETRIC PRESSURE MODE
In normal mode, press [ BARO ] key to switch between ABSOLUTE and RELATIVE barometric
pressure.
39 ~ 49 km/h
Large branches in motion. Whistling heard
25 ~ 30 mph
in overhead wires. Umbrella use becomes
22 ~ 27 knots
difficult. Empty plastic bins tip over.
10.8 ~ 13.8 m/s
50 ~ 61 km/h
31 ~ 38 mph
Whole trees in motion. Effort needed to
28 ~ 33 knots
walk against the wind.
13.9 ~ 17.1 m/s
62 ~ 74 km/h
Some twigs broken from trees.
39 ~ 46 mph
Cars veer on road. Progress on foot is
34 ~ 40 knots
seriously impeded
17.2 ~ 20.7 m/s
75 ~ 88 km/h
Some branches break off trees, and some
47 ~ 54 mph
small trees blow over. Construction /
41 ~ 47 knots
temporary signs and barricades blow over.
20.8 ~ 24.4 m/s
89 ~ 102 km/h
55 ~ 63 mph
Trees are broken off or uprooted,
48 ~ 55 knots
structural damage likely.
24.5 ~ 28.4 m/s
103 ~ 117 km/h
64 ~ 73 mph
Widespread vegetation and structural
56 ~ 63 knots
damage likely.
28.5 ~ 32.6 m/s
≥ 118 km/h
Severe widespread damage to vegetation
≥ 74 mph
and structures. Debris and unsecured
≥ 64 knots
objects are hurled about.
≥ 32.7m/s
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