Former Hurricane Tammy made a transition to a strong extratropical cyclone on Wednesday night. At 5:00 a.m. EDT on Thursday the center of former Hurricane Tammy was located at latitude 30.5°N and longitude 58.4°W which put it about 395 miles (640 km) east-southeast of Bermuda. Tammy was moving toward the north at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 85 m.p.h. (135 km/h) and there were wind gusts to 100 m.p.h. (160 km/h). The minimum surface pressure was 973 mb.

Former Hurricane Tammy made a transition to a strong extratropical cyclone over the Atlantic Ocean east-southeast of Bermuda on Wednesday night. The lower part of Tammy’s circulation merged with a frontal system east of Bermuda. Tammy looked like an occluded extratropical cyclone on satellite images. An occluded front wrapped around the northern part of former Hurricane Tammy. A warm front stretched east of the occluded front. A cold front curved south to the Northern Leeward Islands. The upper part of Tammy’s circulation was captured by an upper level trough near Bermuda.

Former Hurricane Tammy was still producing winds to hurricane force. Winds to hurricane force extended out 30 miles (50 km) from the center of Tammy’s circulation. Winds to tropical storm force extended out 200 miles (320 km) from the center of circulation.

Former Hurricane Tammy is forecast to meander over the Atlantic Ocean east of Bermuda during the next few days. The upper level trough near Bermuda is between an upper level ridge over the southeastern U.S. and a second upper level ridge over the eastern Atlantic Ocean. The two ridges will keep the upper level trough from moving much. Since the upper level trough captured former Hurricane Tammy, Tammy is not likely to move much either.

There is a possibility that former Hurricane Tammy could make a transition back to a tropical cyclone during the next few days. Tammy will meander over water where the Sea Surface Temperatures are near 26°C. The vertical wind shear will decrease if the upper level trough weakens. If more thunderstorms form near the center of Tammy’s circulation and the fronts dissipate over time, then Tammy could make a transition back to a tropical cyclone.

Former Hurricane Tammy could bring gusty winds to Bermuda during the next few days. The western part of Tammy’s circulation could extend over Bermuda at times as Tammy meanders east of Bermuda.