As Tropical Depression 4 (TD04, soon to become Tropical Storm Cristobal) formed in the vicinity of the Turks and Caicos Islands (the island coast line is visible as black line in the lower 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 TD04 sampled from the tail Doppler radar on the P-3 during the evening of 23 August 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 around TD04. Also plotted on each analysis are the locations of dropsondes deployed by the P-3 (plotted using standard station symbols). These analyses show that TD04 had a very 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 circulation center at all altitudes, with stronger winds 45-50 km east of the circulation center at 1-km altitude, and a secondary wind maximum 130-150 km in the eastern semi-circle surrounding the center at 1- and 3-km altitude. From 1-6 km altitude the circulation center is tilted 40-50 km toward the east-southeast indicative of westerly shear of the horizontal wind.
All the TD04/Cristobal radar composites at 0.5-km height resolution are available at http://www.aoml.noaa.gov/hrd/Storm_pages/cristobal2014/radar.html