A visible image from MISR’s nadir viewing camera (left) and a prototype retrieval of high-resolution cross-track cloud motion heights and winds superimposed on the image (right). Hurricane Ida’s eye is on the far right (both images). The low clouds in the right image show the characteristic counter-clockwise flow associated with strong low pressure in the Northern Hemisphere.
These MISR images show cloud detail around Ida’s eye, which was covered by clouds. Strong thunderstorms nearly reaching the stratosphere appear as “bubbles.” Upon reaching the stratosphere, the tops of thunderstorms rapidly spread out, as shown in the image on the right. The clouds to the west of the strongest storms are moving toward the west, while the clouds to the east are moving east. MISR calculated the speed this motion as 22 to 67 mph. |
The first tropical cyclone of the southern Hemisphere cyclone season. When Anja formed on Saturday, November 14, in the Southern Indian Ocean, about 330 miles south-southwest of Diego Garcia it was designated Tropical Cyclone 01S (“S” for south). By Sunday, November 15, 01S had strengthened into a tropical storm and was named Anja. On Monday, November 16, Anja had grown into a Category Three cyclone on the Saffir-Simpson Scale, packing maximum sustained winds near 105 knots (120 mph). NASA’s Terra satellite flew over Anja, and the Moderate Imaging Spectroradiometer (MODIS) instrument captured an image of the storm that showed a cloud-filled eye in the center of circulation. Anja was located 795 miles east-northeast of Port Louis, Mauritius, near 13.4 North and 69.3 East. Anja was moving southwest at 4 mph. Anja was a medium-sized cyclone with tropical storm-force winds extending out to 100 miles from its center, and cyclone (or hurricane)-force winds out to 45 miles from its center. Anja was generating waves as high as 24 feet, and is not threatening any landmasses. Forecasters at the U.S. Navy’s Joint Typhoon Warning Center expect that Anja will move south over the next couple of days and weaken under wind shear. |
