As Tropical Storm Danny continued to weaken just east of the Leeward Islands (see the black lines outlining the 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. This was the last mission into Tropical Storm Danny.
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 24 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 widespread than on the previous missions, but very asymmetric with the bulk of the precipitation covering the northeast and west-southwest quadrants of the storm at all altitudes. There is still an slight indication of a weak circulation center at 1-km altitude, with strongest winds extending from 30-100 km northeast of the circulation center. At 3 and 6-km altitude there is no indication of a circulation center just a shear line extending westward over the 1-km altitude center. The strongest winds at 3-and 6-km altitude were to the northeast of the 1-km circulations center.
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