Friday, September 21, 2007

Update On Hurricane IVO and TD #10

Hurricane Ivo Continues Its Northward Trek

Hurricane Ivo, which at 11 a.m. EDT on Friday, Sept. 21 was a Category One storm with maximum sustained winds of 65 knots (75 miles per hour), continues to move north toward Baja, Calif., in this infrared image from the Atmospheric Infrared Sounder instrument on NASA's Aqua satellite. Ivo is expected to weaken to a tropical storm later today and make landfall in Baja, Calif., as a tropical storm some time on Monday, Sept. 24. The image, acquired at 5 a.m. EDT Sept. 21, shows large areas of strong convection surrounding the core of the storm (in purple).

Image credit: NASA/JPL

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Tropical Depression Ten Forms in the Gulf of Mexico

Tropical Depression Ten

Tropical Depression Ten, expected to become Tropical Storm Jerry later today, formed in the northeastern Gulf of Mexico south of the Florida Panhandle on Friday, Sept. 21, and is expected to make landfall somewhere in the U.S. Gulf Coast on Sept. 22. This infrared image from the Atmospheric Infrared Sounder instrument on NASA's Aqua satellite was acquired at 3:17 a.m. EDT Sept. 21, while the system was still subtropical. At 2 p.m. EDT Sept. 21, Tropical Depression Ten had maximum sustained winds near 30 knots (35 miles per hour), and was moving toward the northwest near 18 kilometers per hour (11 miles per hour). The AIRS image shows the temperature of the cloud tops or the surface of the Earth in cloud-free regions. The lowest temperatures (in purple) are associated with high, cold cloud tops that make up the top of the storm. The infrared signal does not penetrate through clouds. Where there are no clouds the AIRS instrument reads the infrared signal from the surface of the Earth, revealing warmer temperatures (red).

Image credit: NASA/JPL

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