The strong low moved slightly east but remained north of SHEBA ship. Winds were strong at the ship, around 21 kts, and from the west. Some fog or boundary layer cloud appeared to be present all day on the radar image. Visibilities of 4 miles were reported by the ship at 18:00 and 00 UT indicating the fog was light. However, the lidar didn't penetrate through it. The radar found a thin cloud around 2.0 km from 20:00 to 23:00 UT. Higher clouds from 3-5 km started around 22:05 UT on the radar. Then a very dense cloud moved in at 23:00 UT. Radar echo returns extended from the surface to 7 km and snow was reported in the in the 00 UT ship weather observation. Satellite images show a lot of variability in brightness indicating possible convective cells. The 00 UT sounding reported high humidity (with respect to water) up to 8 km indicating that some thin cirrus could have been present above the radar echoes.
The trajectories to SHEBA ship show the dominance of the large low to the north at all levels. Trajectories track around the low back to the SHEBA ship area in 5 to 6 days. Only the surface trajectories differs from this pattern going back into Europe.
