The article “Look Up, Look Down…Look Out” in the July issue implies the radar image has identified a storm not seen by NEXRAD. Cells cannot explode from near nothing to severe levels within four minutes. If so, no radar of any type would be of help. (NEXRAD images are produced every four minutes in Storm Mode.) The author fails to note the cells on the far-left edge of the NEXRAD screen. One must account for time-delay position error of about 5 miles, which would correctly match the location of the cells on his radar. A mental shift in position of a storm of 5 miles is a simple process…but one must remember to do it! A single 12-inch dish simply cannot compete with three 30-foot dishes digitally analyzing the same cell from three separate ground locations. Zoom out NEXRAD images, which excel in defining true size and intensity, to evaluate other storms off screen that might share energy with the cells of concern. Using only radar for close-in work without the aid of NEXRAD is a critical mistake.
Dr. David A Stahle
Thank you Dr. Strahle for your response. As a well-known expert and presenter on the use of in-aircraft datalink NEXRAD, we look forward to a future article from you, delving more deeply into the use of NEXRAD in the cockpit.
– Editor Dianne White