Hurricane Lee moved south of Bermuda on Monday. At 11:00 p.m. EDT on Monday the center of Hurricane Lee was located at latitude 23.9°N and longitude 64.8°W which put it about 580 miles (935 km) south of Bermuda. Lee was moving toward the west-northwest at 7 m.p.h. (11 km/h). The maximum sustained wind speed was 115 m.p.h. (185 km/h) and there were wind gusts to 135 m.p.h. (215 km/h). The minimum surface pressure was 948 mb.
Hurricane Lee went through another eyewall replacement cycle on Monday. The inner end of a rainband wrapped around the existing eye and eyewall early on Monday. Two concentric eyewalls were present at the core of Lee’s circulation during much of Monday. The inner eyewall weakened throughout the day, but a portion of the inner eyewall was still present on microwave satellite images on Monday evening. Low level convergence became concentrated into the outer eyewall and the outer eyewall began to contract around the center of Hurricane Lee. Bands of showers and thunderstorms revolved around the concentric eyewalls. Storms near the core of Lee’s circulation generated upper level divergence that pumped mass away from the hurricane.
The eyewall replacement cycle caused some fluctuations in the size and intensity of Hurricane Lee on Monday. Winds to hurricane force extended out 80 miles (130 km) from the center of Lee’s circulation. Winds to tropical storm force extended out 185 miles (295 km) from the center of circulation. The Hurricane Intensity Index (HII) was 20.6. The Hurricane Size Index (HSI) was 26.4 and the Hurricane Wind Intensity Size Index (HWISI) was 47.0. Hurricane Lee was similar in size and intensity to Hurricane Irma when Irma hit Southwest Florida in 2017.
Hurricane Lee will move through an environment that will be favorable for intensification during the next 24 hours. Lee will move over water where the Sea Surface Temperatures are near 29°C. It will move into a region where the upper level winds are weak and there will be little vertical wind shear. If the inner eyewall dissipates completely, then Hurricane Lee could intensify on Tuesday.
Hurricane Lee will move around the southwestern part of a subtropical high pressure system over the Atlantic Ocean. The high pressure system will steer Lee toward the northwest during the next 24 hours. On its anticipated track, Hurricane Lee will be far to the south of Bermuda on Tuesday.
Elsewhere over the Atlantic Ocean, former Tropical Storm Margot intensified to a hurricane over the Central Atlantic. At 11:00 p.m. EDT on Monday the center of Hurricane Margot was located at latitude 28.0°N and longitude 39.6°W which put it about 1295 miles (2085 km) northwest of the Cabo Verde Islands. Margot was moving toward the north at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 95 m.p.h. (150 km/h). The minimum surface pressure was 984 mb.