Bertha is inmiddels een orkaan van de 1e categorie.
Hawaï krijgt bezoek van een Tropische storm.
quote:
Hurricane Iselle Headed Towards Hawaii
Hurricane Iselle continued to intensify overnight, reaching Category 3 strength with 125 mph winds at 5 am EDT on Monday. Iselle is likely at peak intensity, since ocean temperatures beneath the storm are now 26°C, which is marginal for maintaining a hurricane. Iselle is headed westwards at 10 mph towards Hawaii, and could affect the Hawaiian Islands as a tropical storm by Thursday night. Satellite images show an impressive storm with a large eye, good symmetry, and plenty of upper-level outflow. The relative lack of spiral bands and large, thick eyewall qualify Iselle to be a rare breed of hurricanes known as "annular". Annular hurricanes are a subset of intense tropical cyclones that are significantly stronger, maintain their peak intensities longer, and weaken more slowly than average tropical cyclones. The latest SHIPS model output indicates that Iselle has passed the initial screening step to be considered an annular hurricane, and the model's "Annular Hurricane Index" shows a high level of annularity for the hurricane. Only 4% of all hurricanes are annular hurricanes. The most recent annular hurricane in the Eastern Pacific that I am aware of was Category 4 Hurricane Kenneth of November 2011.