The CV-580 flew to Barrow and then to SHEBA ship.
GAC images were available at 19 and 04 UT. The 22 UT GAC data were not saved at Wisconsin. The only HRPT data saved was at 22 UT over Barrow.
The large low in the Bering Straights moved slightly northward. Winds increased to 15 kts from the northeast at SHEBA ship. Satellite images showed that SHEBA ship was under a band of cirrus which thinned during the afternoon. Radar reported dense returns from 3 to 8 km. Lidar also indicated a cloud base around 3 km. The ship sounding indicated possible cloud up to 9.5 km. The sounding also showed a very dry layer from 2-3 km.
The Alaskan coast appeared to have dense cloud cover from Inuvik to Barrow. Dense cirrus were seen east of Barrow on the satellite image. Barrow itself, only had a few broken clouds on the 22:18 UT NOAA 14 HRPT image. Ice boundaries and water could easily be seen on this image.
Trajectories to SHEBA SHIP show that the low level air, surface to 1.5 km, came from the Beaufort Sea east of SHEBA ship. The 3 and 6 km air appeared to come from the Bering Straights with a loop over western Alaska, and the 9 km air came from Siberia directly across the Chukchi Sea. Winds were weak as the trajectories show shorter paths over the 6 day histories than on previous analyses.
Trajectories to Barrow show air from all levels came off of eastern Siberia looping south through the Bering Straights and back north acrossed western Alaska. The 1.0 and 1.5 km trajectories actually go back to the Chukchi sea before looping south over the Bering Straights and back north over Western Alaska.
