Displaying weather fronts:
X Activate the Atmospheric
Atmospheric Pressure
Pressuredisplay
level (Y page 172).
If weather data is available, the weather map will then display the weather fronts.
The example shows the position of high and
low-pressure areas (H, L), weather fronts and
isobars. Isobars are lines that show where the
air pressure is the same.
Legend: weather fronts Weather
front Explanation
Cold front
(blue line with
blue triangles) If a cold front moves in, the
weather remains changeable
and there are often rain
showers and thunderstorms. The air temperature decrea-
ses. Warm front
(red line with
red semi-cir-
cles) A warm front may cause
more prolonged steady rain,
more cloud cover and a slow
rise in temperature. Stationary
front
(red and blue
line with red
semi-circles
and blue trian-
gles) The weather front moves
minimally. The weather
remains changeable in this
area.
Occlusion
(purple line
with purple
semi-circles
and triangles) When the faster cold front
catches up and joins the
warm front ahead of it, an
occluded front is formed. The
weather remains changeable
and rainy within an occlu-
sion. Displaying storm tracking information:
X Activate the Tropical TropicalStorm
StormTracking
Tracking dis-
play level (Y page 172).
If weather data is available, the weather map
will then display storm tracking information.
Example: in the middle of the map you can see the current position of the tropical low-pres-
sure area (cyclone). To the right of this a solid
line shows the previous path with positions
and times. The forecast for the direction of
propagation is shown by a dotted line with
positions and times. You can find out detailed information on a
cyclone in the Storm Guide (Y
page 175).
A tropical storm is separated into different cat-
egories according to the location at which it
develops. Region of origin category
Atlantic, North
and South Pacific
Oceans Name of tropical low-
pressure system
(Trop‐ (Trop‐
ical Low Press.
ical Low Press.
Sys.) Sys.) Atlantic, North
and South Pacific
Oceans
Name of tropical storm
(Tropical Storm) (Tropical Storm)Weather forecasts
173SIRIUS Weather
Region of origin category
Atlantic, North
and South Pacific
Oceans
Name of tropical storm
(Hurricane Category (Hurricane Category
3) 3)
Displays hurricane cate-
gories 1 through 5
Northwestern
Pacific Ocean
Name of tropical storm
(Tropical Low (Tropical Low
Press. Sys.) Press. Sys.)
Northwestern
Pacific Ocean
Name of tropical storm
(Tropical Cyclone) (Tropical Cyclone)
Northwestern
Pacific Ocean
Name of tropical storm
(Typhoon) (Typhoon)
Northwestern
Pacific Ocean
Name of tropical storm
(Super-Typhoon) (Super-Typhoon)
If you have selected a map scale of 50 mi
(50 km) or smaller you will also see the time
stamp for the current weather data.
The weather map shows wind directions and
wind speeds.
Legend (precipitation radar and storms) X
Display the menu on the weather map
(Y page 171).
X To select View View: turn and press the controller.
X Select Legend
Legend.
i The symbol for a tornadic storm is also valid
for a cyclone (mesocyclone). Precipita-
tion type Color scale
Rain Eleven shades from light (light
green) to heavy (red)
Mixed Light (light violet) to heavy (vio-
let) Snow Light (light turquoise) to heavy
(turquoise)
Time stamp
The time stamp shows when the weather data
was created by the weather station.
A time stamp corresponds to the time at the
vehicle's current position. The changeover from
summer time to standard time is performed
automatically.
X Display the menu on the weather map
(Y page 171).
X To select View View: turn and press the controller.
X Select Time Stamp
Time Stamp.
Changing to the information chart X
Display the menu on the weather map
(Y page 171).
X To select Weather Weather Table
Table: turn and press the
controller.
Storm watch areas Storm watch areas for which there are storm
advisories are displayed as red areas on the
weather map. 174
Weather forecastsSIRIUS Weather
