Tropical Storm Dorian brought wind and rain to Barbados on Monday night. Observations made by a U.S. Air Force Reserve Hurricane Hunter aircraft indicated that the center of Tropical Storm Dorian passed just south of Barbados on Monday night. Dorian brought winds to tropical storm force and locally heavy rain. At 11:00 p.m. EDT on Monday the center of Tropical Storm Dorian was located at latitude 13.2°N and longitude 59.7°W which put it about 95 miles (155 km) east-southeast of St. Lucia. Dorian was moving toward the west-northwest at 13 m.p.h. (20 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 1003 mb.
Tropical Storm Warnings were in effect for Barbados, St. Lucia, Martinique, St. Vincent and the Grenadines. Tropical Storm Watches have been issued for Puerto Rico, Grenada, Dominica, Saba and St. Eustatius.
The circulation around Tropical Storm Dorian remained fairly small on Monday. Winds to tropical storm force only extended out about 45 miles (75 km) from the center of circulation. Thunderstorms were occurring primarily in bands in the northern half of the circulation. Bands in the southern half of the circulation consisted primarily of showers and lower clouds. Storms near the center of Dorian were generating upper level divergence which was pumping mass away from the tropical storm.
Tropical Storm Dorian will move through an environment somewhat favorable for intensification. Dorian will move over water where the Sea Surface Temperature is near 29°C. Tropical Storm Dorian will move south of an upper level ridge. The ridge will produce easterly winds which will cause some vertical wind shear, but the shear should not be strong enough to prevent intensification. Dorian will move just south of a large mass of drier air. It appears that some drier air will get pulled into circulation at times and the drier air will interrupt periods of intensification. Since the circulation around Tropical Storm Dorian is very small, Dorian could strengthen or weaken very quickly if environmental conditions change.
Tropical Storm Dorian will move south of a subtropical high pressure system over the Atlantic Ocean. The high will steer Dorian toward the west-northwest during the next several days. On its anticipated track the center of Tropical Storm Dorian will pass near St. Lucia on Tuesday morning. Dorian could approach Puerto Rico on Wednesday.
Elsewhere over the Atlantic Ocean, Tropical Depression Six formed off the southeast coast of the U.S. At 11:00 p.m. EDT on Monday the center of Tropical Depression Six was located at latitude 31.5N and longitude 72.2W which put it about 320 miles southeast of Cape Hatteras, North Carolina. It was moving toward the east at 3 m.p.h. The maximum sustained wind speed was 35 m.p.h. and the minimum surface pressure was 1010 mb.