As Hurricane Arthur passed southeast of Long Island, NY (the New England coast is visible as black line in the upper portion of the images) a G-IV mission collected airborne Doppler radar data to use in initializing and evaluating model guidance. Included here you see images of the horizontal winds within 300 km of Arthur sampled from the tail Doppler radar on the G-IV aircraft during the late afternoon of July 4, 2014. These images are at three altitudes (1 km, 3 km, and 6 km) and are a composite of winds from the G-IV Doppler pattern around Arthur. Also plotted on each analysis are the locations of dropsondes deployed by the G-IV (plotted using standard station symbols). These analyses show that Arthur maintained an asymmetric distribution of precipitation at all altitudes, with the bulk of the precipitation surrounding the center and extending primarily toward the south and east. There is indication of a clear circulation center at all altitudes, with strongest winds in a secondary wind maximum 125-130 km east-southeast of the circulation center, suggesting the storm was starting to undergo extra-tropical transition. At all altitudes there is a clear indication of a broadening wind maximum south and east of the center and at 6-km altitude an eroding of the wind maximum west and northwest of the center as the storm interacted with the frontal zone over southern New England. From 1-6 km altitude the circulations center is tilted up to 50 km toward the north and east indicative of very strong westerly shear.
All the Arthur radar composites at 0.5-km height resolution are available at http://www.aoml.noaa.gov/hrd/Storm_pages/arthur2014/radar.html