Doppler radar quick-looks from 2:00 AM P-3 flight into Ex-Hurricane Arthur, 5 July 2014

As the remains of Hurricane Arthur transitioned into an extra-tropical cyclone as it approached landfall in Nova Scotia (the Gulf of Maine and Nova Scotia coast are visible as black line in the upper half  of the images) a 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 aircraft during the early morning of July 5, 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 the remains of Arthur. Also plotted on each analysis are the locations of dropsondes deployed by the P-3 (plotted using standard station symbols). These analyses show that the remains of Arthur had a very asymmetric distribution of precipitation at all altitudes, with the bulk of the precipitation extending north and west of the low-level center along the coast of Maine. There is indication of a circulation center only at 1-and 3-km altitude over the entrance to the Bay of Fundy, with strongest winds coming offshore from the north-northwest into the Gulf of Maine. At 6-km altitude there is only an indication of a shear zone west and northwest of the low-level center along the frontal zone over New England.

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