GPSMAP 4000 Series Owner’s Manual 59
Using XM
USinG Xm
Understanding Storm Cell Information
The storm cells show storms as well as the storm’s projected path in the immediate future.
The direction of the red cone indicates the projected path of the storm cell. The red bars that appear
in the cone indicate where the storm will most likely be in the future. Each bar represents 15
minutes.
Understanding Lightning Information
Lightning strikes are represented by lightning bolt icons. Lightning appears on the map if strikes
were detected within the last seven minutes. The ground-based lightning detection network detects
only cloud-to-ground lightning.
Understanding Hurricane Information
The Hurricanes feature shows the current position of a hurricane, tropical storm, or tropical
depression, as well as its projected path (indicated by a red line). The darkened dots on the red line
display the projected locations received from the National Hurricane Center. The center provides
four forecasts at 12-hour intervals (12 Hrs, 24 Hrs, 36 Hrs, and 48 Hrs), as well as the current
conditions (Now).
