Xm wx weather features, Displaying weather information – Garmin GXM 40 User Manual
Page 10
GXM 40 Owner’s Manual
XM WX Weather Features
XM WX Weather Features
Displaying Weather Information
The GXM 40 receives XM WX Weather data and shows
it on the Map and Weather pages of the Garmin unit. The
weather data for each feature comes from reputable weather
data centers such as the National Weather Service and the
Hydrometerological Prediction Center. (See the XM WX
Satellite Weather W
for more information.) Any weather feature
can change in appearance or interpretation if the source that
provides the information changes. XM WX Weather data
is broadcast at set rates (see
for all weather-related
broadcast rates). For example, NEXRAD Radar data is
broadcast at five-minute intervals. When the Garmin unit
is turned on or when a new feature is selected, the GXM
40 has to receive new data before it can be displayed. You
can experience a delay before weather data or a new feature
appears on the map.