As Tropical Storm Arthur continued to intensify just east of Jacksonville, Florida (the Florida coast is visible as black line in the left of the images) a NOAA P-3 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 P-3 during the early evening of July 2, 2014. These images are at three altitudes (1 km, 3 km, and 6 km) and are a composite of winds from the P-3 Doppler pattern and a G-IV surveillance pattern around Arthur. Also plotted on each analysis are the locations of dropsondes deployed by the P-3 and the G-IV (plotted using standard station symbols). These analyses show that Arthur still had an asymmetric distribution of precipitation at all altitudes, with the bulk of the precipitation surrounding the center and extending toward the south and east. There is indication of a clear circulation center at all altitudes, with stronger winds 25-30 km east of the circulation center, where the peak winds at 1-km are above hurricane strength. From 3-6 km altitude, the circulation center is tilted 15-20 km toward the southeast indicative of increased west-northwesterly 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