Doppler radar quick-looks from 2:00 PM P-3 and G-IV flights into Tropical Storm Bertha, 3 August 2014

As Tropical Storm Bertha passed north of the Turks and Caicos Islands (the island coast line is visible as black line in the lower left of the G-IV images) a NOAA P-3 and 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 Bertha sampled from the tail Doppler radar on the P-3 and within 450 km of Bertha from the G-IV aircraft during the afternoon of 3 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 and G-IV Doppler patterns around Bertha. Also plotted on each analysis are the locations of dropsondes deployed by the P-3 and G-IV (plotted using standard station symbols). These analyses show that Bertha 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, and a secondary wind maximum 200 km east-northeast of the center. From 1-6 km altitude the circulations center is tilted 20-25 km toward the east indicative of moderate westerly shear.

All the Bertha radar composites at 0.5-km height resolution are available at

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