Monday, November 13, 2017

96L Southwest of the Azores May Become Subtropical Storm Sean


Above:  MODIS satellite image of 96L taken on Monday morning, November 13, 2017. Image credit: NASA
A non-tropical low-pressure system with the potential to develop into a subtropical storm was located in the east-central Atlantic about 600 miles southwest of the Azores Islands on Monday morning. This system was designated Invest 96L by NHC over the weekend. The low is moving slowly northeastward towards the Azores, which is the only land area that needs to be concerned with this storm.
Conditions were marginally favorable for development on Monday, with moderate wind shear of 15 knots and ocean temperatures of 24°C (75°F). These temperatures are probably too cool to allow transition of 96L to a fully tropical storm, but may be warm enough to allow 96L to become a subtropical storm deserving of a name. Satellite loops on Monday morning showed that 96L was already beginning to take on some characteristics of a subtropical storm, with a large area of heavy thunderstorms located in a curved band more than 100 miles from the cloud-free center of circulation. In their 7 am EST  Tropical Weather Outlook, NHC gave 96L 2-day and 5-day odds of development of 30% and 50%, respectively. The next name on the Atlantic list of storms is Sean.

https://s.w-x.co/wu/96L-nov13.jpeg

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