PRIMUSr 880 Digital Weather Radar System
Step | Procedure |
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11 | Never continue flight towards or into a radar |
| shadow or the blue REACT field. |
| WARNING |
| STORMS SITUATED BEHIND INTERVENING RAIN- |
| FALL MAY BE MORE SEVERE THAN DEPICTED ON |
| THE DISPLAY. |
| If the radar signal can penetrate a storm, the target |
| displayed seems to cast a shadow with no visible |
| returns. This indicates that the storm contains a great |
| amount of rain, that attenuates the signal and prevents |
| the radar from seeing beyond the cell under observation. |
| The REACT blue field shows areas where attenuation |
| could be hiding severe weather. Both the shadow and |
| the blue field are to be avoided by 20 miles. Keep the |
| REACT blue field turned on. The blue field will form |
| fingers that point towards the stronger cells. |
| Severe Weather Avoidance Procedures |
| Table 5- 12 |
Configurations of Individual Echoes (Northern Hemisphere)
Sometimes a large echo will develop configurations which are associated with particularly severe aviation hazards. Several of these are discussed below.
AVOID HOOK ECHOES BY 20 MILES
The hook is probably the best known echo associated with severe weather. It is an appendage of a thunderstorm echo and usually only appears on weather radars. Figure 5- 42 shows a hook echo.
Radar Facts | A28- 1146- 102- 00 |
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