The CV-580 flew from Barrow home to Inuvik.
A small low was southwest of SHEBA ship. This was a small extension of the large Aleutian low which was very far south along the Asian coast of the Pacific. Winds were light and easterly at the surface at SHEBA ship, while aloft, they were southwesterly.
Trajectories to the ship show the surface air came from the northeast in the Arctic ocean not traveling very far because of the light winds. The 1.0 km trajectory came from northwestern Alaska. All levels from 1.5 to 9 km came from Siberia to the southwest.
A second trajectory analysis was made along the Alaskan coast, at 70.5 N and 142.5 W, to depict some of the air sampled by the CV-580 on its flight to Inuvik. This air came mainly from western Alaska. Only the 6 and 9 km levels came from farther west, Siberia and the Aleutian Islands.
A lot of broken cloud cover appeared along the Alaskan coast of the Beaufort Sea. Some ice patterns could be seen along with the shore-fast ice boundary in the breaks of the clouds.
