As Hurricane Danny continued to weaken to a tropical storm 450 nm east of the Leeward Islands a NOAA P-3 mission collected airborne Doppler radar data to use in initializing and evaluating model guidance.
The figure below depicts the aircraft flight track (P-3: yellow line) superposed on real-time lower fuselage radar and visible satellite imagery.
Included here you see images of the horizontal winds within 180 km of Danny sampled from the tail Doppler radar on the P-3 during the early morning of 23 August 2015. These images are at three altitudes (1 km, 3 km, and 6 km) and are a composite of winds from the P-3 Doppler patterns around Danny. Also plotted on each analysis are the locations of dropsondes deployed by the P-3 (plotted using standard station symbols). These analyses show that Danny’s precipitation distribution was more symmetric at all altitudes than in the afternoon mission, with the bulk of the precipitation surrounding the center at 1- and 3-km altitude, and covering primarily in the northern semicircle of the storm at 6-km altitude. There is still an indication of a small circulation center at 1-km altitude, with strongest winds extending from 30-100 km north of the circulation center. At 3-km altitude the strongest winds extending from 35-60 km north of the circulation center, and at 6-km altitude there are multiple wind maxima north and northeast of the center. From 1-6 km altitude the circulation center was still tilted to the northeast, with the 6-km center almost 30-40 km northeast of the 1-km center, indicative of continued strong southwesterly shear of the horizontal wind.
All the Hurricane Danny radar composites at 0.5-km height resolution are available at: http://www.aoml.noaa.gov/hrd/Storm_pages/danny2015/radar.html