Sam rapidly intensifies into a Category 3 major hurricane
Hurricane Sam has strengthened into the fourth major hurricane of 2021. Elsewhere, we have two areas to watch.
CHARLOTTE, N.C. — Hurricane Sam has rapidly intensified to a Category 3 with maximum sustained winds of 120 mph. Rapid intensification is defined as a wind increase of 35 mph or more over a 24-hour period.
The storm has become the fourth major hurricane this year as it continues its trek toward the west-northwest. Long-range forecast models indicate a strong trough of low pressure will keep the storm away from the United States east coast.
Depending on how strong the storm eventually becomes and how close it tracks, the swells could increase our rip current risk slightly along the eastern seaboard. You can trust the WCNC Charlotte weather team to keep you updated on any changes.
The other named system in the Atlantic Basin is Subtropical Depression Teresa. This will be a short-lived system that will have no impact to the United States. A subtropical system is a cyclone that has both atmospheric influences, such as a cold front, as well as tropical characteristics.
Elsewhere, we have two areas of interest to watch. A low pressure system associated with the remnants of Peter is located south of Bermuda. There is a small, limited potential for development over the next 5 days.
Eventually, strong wind shear looks to break this system apart. Right now, the National Hurricane Center is giving it a 20% chance of formation.
Lastly, we have a new tropical wave expected to move off the west coast of Africa by Monday. Environmental conditions will be marginally conducive for development once it does.
A tropical depression is likely to form mid-next week. Right now, the National Hurricane Center is giving it a 50% chance of development.