Fronts - Garmin GXM 30A Owner's Manual

Fronts

The Fronts feature displays lines indicating the leading edge of an 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 lowest relative to the surrounding area.
Indicates a Low Pressure Center. A Low Pressure
Center is an area where the measured pressure is
lowest relative to the surrounding area. Moving
away from a Low Pressure Center in any horizontal
direction results in increased pressure. Winds flow
counterclockwise around Low Pressure Centers in
North America.
Indicates a High Pressure Center. Similar to a Low
Pressure Center, a High Pressure Center is an area
where the measured pressure is highest relative to
the surrounding area. Moving away from a High
Pressure Center in any horizontal direction results
in decreased pressure. Winds flow clockwise
around Low Pressure Centers in North America.
GXM 30A XM Radio Smart Antenna Owner's Manual
XM W f >
eather eatures
Cold Front
Warm Front
Stationary Front
Occluded Front
Trough
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ronts