MTSAT-1R 10.7 µm IR images (above) showed Super Typhoon Choi-Wan (17W) as it reached Category 5 intensity over the western North Pacific Ocean during the 15 September – 16 September 2009 period. The eye of the typhoon was quite large (which moved just... Read More
Meteosat-9 IR images from the CIMSS Tropical Cyclones site (above) showed that Hurricane Fred began to exhibit a well-defined eye as it rapidly intensified to a Category 3 storm on 09 September 2009. As noted in the National... Read More
Vertical wind shear is the change of wind speed and/or direction with height. For tropical cyclones, wind shear is something that must be overcome if strengthening is to occur. For (minimal) tropical storm Danny, strong wind shear has persisted in keeping convection far from the storm center. When the storm... Read More
An area of disturbed weather north of the Bahamas developed into Tropical Storm Danny early on 26 August. Satellite loops of the visible imagery, above, clearly show a low-level circulation that is displaced from the area of main convection to the north and east. Until the convection and the low-level... Read More
