57
8
Gale
62 ~ 74 km/h
Some twigs broken from trees.
Cars veer on road. Progress on foot is
seriously impeded
39 ~ 46 mph
34 ~ 40 knots
17.2 ~ 20.7 m/s
9
Strong gale
75 ~ 88 km/h
Some branches break off trees, and some
small trees blow over. Construction /
temporary signs and barricades blow over.
47 ~ 54 mph
41 ~ 47 knots
20.8 ~ 24.4 m/s
10
Storm
89 ~ 102 km/h
Trees are broken off or uprooted,
structural damage likely.
55 ~ 63 mph
48 ~ 55 knots
24.5 ~ 28.4 m/s
11
Violent storm
103 ~ 117 km/h
Widespread vegetation and structural
damage likely.
64 ~ 73 mph
56 ~ 63 knots
28.5 ~ 32.6 m/s
12
Hurricane force
≥ 118 km/h
Severe widespread damage to vegetation
and structures. Debris and unsecured
objects are hurled about.
≥ 74 mph
≥ 64 knots
≥ 32.7m/s
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.
4.3.10
RAIN
The
RAINFALL
section shows the rainfall or rain rate information.
4.3.10.1 THE RAINFALL DISPLAY MODE
Press
[ RAIN ]
key to toggle between:
1. RATE
- Current rainfall rate (base on 10 min rain data)
2. HOURLY
- the total rainfall in the past hour
3. DAILY
- the total rainfall from midnight (default)
4. WEEKLY
- the total rainfall of the current week
5. MONTHLY
- the total rainfall of the current calendar month
6. TOTAL
- the total rainfall since the last reset
Period of rainfall
EN
