Subtropical Storm Don was spinning over the Central Atlantic Ocean on Saturday. At 11:00 a.m. EDT on Saturday the center of Subtropical Storm Don was located at latitude 36.5°N and longitude 48.8°W which put it about 1200 miles (1930 km) west of the Azores. Don was moving toward the northwest at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 1006 mb.

Subtropical Storm Don weakened a little on Saturday as the environment became less favorable. Many of the bands revolving around the center of Don’s circulation consisted primarily of showers and lower clouds. Winds to tropical storm force extended out 175 miles (280 km) in the eastern side of Subtropical Storm Don. Winds in the western side of the circulation were blowing at less than tropical storm force. Subtropical Storm Don moved over slightly cooler water and less energy was transferred from the ocean to the atmosphere. In addition, the center of Don’s circulation was under the southeastern part of an upper level low over the Central Atlantic. The upper level low was producing southeasterly winds that were blowing across the top of Subtropical Storm Don. Those winds were causing moderate vertical wind shear. The cooler water and moderate vertical wind shear caused Subtropical Storm Don to weaken.

Subtropical Storm Don will move through an environment unfavorable for intensification during the next 24 hours. Don will move over water where the Sea Surface Temperatures are near 25˚C. The upper level low will continue to cause moderate vertical wind shear. The upper level low could also circulate sinking, drier air around the southern side of Don’s circulation. Subtropical Storm Don could weaken a little more during the next 24 hours, but its intensity may not change much.

Subtropical Storm Don will move around the northwestern part of a subtropical high pressure system over the Atlantic Ocean during the next 24 hours. The high pressure system will steer Don toward the north during the next 24 hours. Don is likely to move toward the east on Sunday. On its anticipated track, Subtropical Storm Don will meander west of the Azores during the next few days.

Subtropical Storm Don developed west of the Azores on Friday morning. At 5:00 a.m. EDT on Friday the center of Subtropical Storm Don was located at latitude 32.9°N and longitude 46.8°W which put it about 1165 miles (1875 km) west-southwest of the Azores. Don was moving toward the north at 6 m.p.h. (10 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 1005 mb.

A large low pressure system over the central Atlantic Ocean west of the Azores exhibited more organization on Friday morning and the U.S. National Hurricane Center designated the system as Subtropical Storm Don. A distinct low level center of circulation was evident on visible satellite images. However, Subtropical storm Don was under an upper level trough. The bands near the center of Don consisted primarily of showers and lower clouds. Thunderstorms were occurring in a band that curled around the eastern and northern part of Don’s circulation. The strongest winds were occurring in that band of storms. Winds to tropical storm force extended out 200 miles (320 km) in the eastern side of Subtropical Storm Don. Winds in the western side of Don were blowing at less than tropical storm force.

Subtropical Storm Don will move through an environment only marginally favorable for intensification during the next 24 hours. Don will move over water where the Sea Surface Temperatures are near 26˚C. The upper level trough contains colder air, which will contribute to a more unstable atmosphere. However, the upper level trough will also limit the upper level divergence. There will be little vertical wind shear near the center of the upper level trough. Southerly in the eastern side of the trough will blow over the eastern side of Subtropical Storm Don. Those winds will cause more vertical wind shear in that area. The upper level trough could also circulate sinking, drier air around the western and southern sides of Don’s circulation. Subtropical Storm Don could maintain an equilibrium with its environment during the next 24 hours and its intensity may not change much.

The upper level trough will steer Subtropical Storm Don slowly toward the north during the next 24 hours. A high pressure system south of Greenland will block Don and prevent it from moving north on Sunday. Don is likely to move toward the east early next week. On its anticipated track, Subtropical Storm Don will meander west of the Azores during the next few days.