Fronts - Garmin 010-00730-00 Owner's Manual

Fronts

The Fronts feature displays the lines indicating the leading edge of an air mass that is replacing an existing air mass. This
feature also displays pressure centers. Pressure centers are represented by a large red "L" for low-pressure centers or a large
blue "H" for high-pressure centers. Pressure centers represent an area where pressure is measured to be either the highest or
the lowest relative to the surrounding area.
Indicates a low-pressure center. A low-pressure Indicates a low-pressure center. A low-pressure
center is an area where the measured pressure is center is an area where the measured pressure is
lowest relative to the surrounding area. Moving lowest relative to the surrounding area. Moving
away from a low-pressure center in any horizontal away from a low-pressure center in any horizontal
direction results in increased pressure. Winds flow direction results in increased pressure. Winds flow
counterclockwise around low-pressure centers in counterclockwise around low-pressure centers in
North America. North America.
Indicates a high-pressure center. Similar to a low- Indicates a high-pressure center. Similar to a low-
pressure center, a high-pressure center is an area pressure center, a high-pressure center is an area
where the measured pressure is highest relative to where the measured pressure is highest relative to
the surrounding area. Moving away from a high- the surrounding area. Moving away from a high-
pressure center in any horizontal direction results pressure center in any horizontal direction results
in decreased pressure. Winds flow clockwise in decreased pressure. Winds flow clockwise
around high-pressure centers in North America. around high-pressure centers in North America.
GXM 40 Owner's Manual
XM WX Weather Features
Cold front Cold front
Warm front Warm front
Stationary front Stationary front
Occluded front Occluded front
Trough Trough