Nexrad - Garmin GTN 750 Pilot's Manual

12.1.5

NEXRAD

WSR-88D, or NEXRAD (NEXt-generation RADar), is a network of 158 high-
resolution Doppler radar systems that are operated by the National Weather
Service (NWS). NEXRAD data provides centralized meteorological information
for the continental United States and selected overseas locations. The maximum
range of a single NEXRAD radar site is 250 NM. The NEXRAD network provides
important information about severe weather for air traffic safety.
NEXRAD data is not real-time. The lapsed time between collection,
processing, and dissemination of NEXRAD images can be significant and may
not reflect the current radar synopsis. Due to the inherent delays and the relative
age of the data, it should be used for long-range planning purposes only. Never
use NEXRAD data to penetrate hazardous weather. Instead, use it in an early-
warning capacity of pre-departure and en route evaluation.
Composite data from all the NEXRAD radar sites in the United States is shown.
Canadian radar data provided by Environment Canada. This data is composed
of the maximum reflectivity from the individual radar sweeps. The display of the
information is color-coded to indicate the weather severity level.
NOTE: Due to similarities in color schemes, the display of Echo Tops cannot
be shown with Cloud Tops and NEXRAD.
1. While viewing the Datalink Weather menu, touch the NEXRAD
key to step through the NEXRAD selections.
190-01007-03 Rev. B
Figure 12-7 NEXRAD Weather
Garmin GTN 725/750 Pilot's Guide
Age Of Selected
Weather
Products
NEXRAD Weather
Present Position
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
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Utilities
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Symbols
Appendix
12-9
Index