As Tropical Cyclone Iggy approached Australia's Sunset Coast on February 3, 2012, the storm encountered wind shear and began to weaken. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Aqua satellite captured this true color image at 0615 UTC (1:15 a.m. EST) on that same day.

In this image, the storm appears elongated from northwest to southeast, which is the direction of the wind shear.

On February 2, 2012, Tropical Depression Iggy had maximum sustained winds near 30 knots (35 mph). It was located about 170 nautical miles (196 miles/315 km) northwest of Perth, Western Australia, and its center was near 29.9 South latitude and 114.2 East longitude. Iggy was moving to the east at 14 knots (16 mph) and was expected to continue in that direction.

Credit: Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC Click to enlarge. (1.4 mb)



The Hurricanes: Science and Society Webinar Series

Hurricanes: Science and Society is hosting a five-part webinar series in this spring. The webinar series will provide participants with an opportunity to "meet" some of the country's top hurricane scientists and introduce a range of hurricane topics from the basics of hurricane science to advances in forecasting hurricanes to preparing for an approaching hurricane.

Each of the five one hour webinars will have leading members of the hurricane research and forecasting fields discussing their research and answering questions from the "audience." Target audiences include instructors of high school and undergraduate level courses and informal science educators. However, citizens of all ages are welcome to tune in.

Today's Weather Activity

Welcome to JetStream, the National Weather Service Online Weather School. This site is designed to help educators, emergency managers, or anyone interested in learning about weather and weather safety.

The information contained in JetStream is arranged by subject; beginning with global and large scale weather patterns followed by lessons on air masses, wind patterns, cloud formations, thunderstorms, lightning, hail, damaging winds, tornados, tropical storms, cyclones and flooding. Interspersed in JetStream are "Learning Lessons" which can be used to enhance the educational experience.

You are free to use the materials in any manner you wish. We welcome your feedback on this project. Your input will greatly assist others in teaching the "hows" and "whys" of weather. Not sure where to begin? Click to see all topics in JetStream in the Topic Matrix. Contact Us:

Steven Cooper Steven.Cooper@noaa.gov
Deputy Regional Director, NWS Southern Region Headquarters, Fort Worth, Texas

Dennis Cain Dennis.Cain@noaa.gov
a.k.a. "Professor Weather", NWS Fort Worth, Texas