Tropical Storm Sebastien Forms in the North Atlantic; Double Threat for the Philippines

The long-lasting 2019 Atlantic hurricane season is not over yet: Tropical Storm Sebastien has formed in the basin near the Lesser Antilles. Sebastien is forecast to remain over open waters and become extratropical later this week. In the Western Hemisphere, the Philippines are facing a double threat from Typhoon Kalmaegi and Tropical Depression Sarah, the latter of which is forecast to intensify as it passes near Luzon and Taiwan later this week with the potential for more heavy rainfall in a region already facing impacts from Typhoon Kalmaegi.

Atlantic Hurricane Season Continues

A broad area of low pressure which the National Hurricane Center (NHC) has been monitoring during the past couple of days consolidated and became much better defined today. At 10:00 AM AST (15:00 UTC), the NHC initiated advisories on Tropical Storm Sebastien, which is currently located near the Lesser Antilles. As of the latest advisory from the NHC at 4:00 PM AST (21:00 UTC), Tropical Storm Sebastien is located near 20.6°N, 59.7°W, about 275 mi (445 km) northeast of the northern Leeward Islands. Sebastien is moving toward the northwest at near 12 mph (19 km/h). The tropical storm is forecast to turn to the north on Wednesday followed by a turn to the northeast with an increase in forward speed Wednesday night. Maximum sustained winds are near 45 mph (75 km/h), gusting to 60 mph (95 km/h), and the minimum central pressure is 1006 mb (29.71 inches). Some strengthening is forecast during the next 48 hours. Sebastien is forecast to become extratropical by Thursday night as it accelerates ahead of and is absorbed by an approaching cold front. There are no tropical cyclone watches and/or warnings in effect, and Sebastien is forecast to remain over open waters.

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