Hurricane Gaston continues across the northern Atlantic as a slowly weakening storm. As of the noon advisory from the National Hurricane Center, tropical storm warnings are in effect for the western and central islands of the Azores as Gaston quickly approaches from the west. Tropical storm conditions (sustained winds greater than 34 kts/39 mph) are expected to spread across the warned islands in the next 24-36 hours.
Gaston is moving over increasingly cool sea surface temperatures. As a result, a continued weakening trend is expected despite the otherwise favorable environment, and Gaston is expected to weaken below hurricane strength before reaching the western Azores on Friday and central Azores Friday night. Strong, locally damaging winds, and torrential rains can be expected, particularly on the windward side and at higher elevations on the western islands.
Hurricane Gaston is not a potential threat to Bermuda and is not expected to become a threat.
Tropical Storm Hermine
Meanwhile, TD9 has strengthened into Tropical Storm Hermine in the Gulf of Mexico. As of the noon advisory from the NHC, Hermine continues to approach Florida for an expected landfall just after midnight tonight. Hermine is expected to strengthen into a hurricane before coming onshore and hurricane warnings are in effect for parts of Florida as a result (see NWS).
Tropical storm conditions are expected to reach coastal Florida later this afternoon, and hurricane conditions are possible somewhere in the hurricane warned area overnight. Further threats from Hermine include: heavy rains and associated flooding, coastal flooding due to storm surge, and isolated tornadoes.
Hermine is now expected to track along the coast of Georgia, South Carolina, and North Carolina before exiting into the western Atlantic. Tropical Storm watches and warnings are in effect for the Atlantic coast of the US. Once offshore, Hermine is expected to become post-tropical and linger over the weekend and into the beginning of next week. Hermine is currently not a potential threat to Bermuda, but should be monitored closely as it tracks and lingers along or offshore of the US east coast over the weekend.