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Comments and Teaching Tips given for Remote Sensing Using Satellites Comment on this resource

Aug 2, 2007 by Don Hoffman, American Samoa Dept. of Ed.
The southern hemisphere arrows on your page 2 hurricane map are wrong. Hurricanes in the southern hemisphere move west to east. Believe me. I know. Hurricane Olaf just went past my house.

Aug 2, 2007 by Kathryn Ginger, University Corporation for Atmospheric Research (UCAR)
The comment made by Don Hoffman needs some explanation. The page in the resource to which he is referring is http://www.comet.ucar.edu/nsflab/web/hurricane/312.htm The diagram on that page shows where hurricanes form and the general climatic trends for hurricane movement. Don claims the arrows for the Southern Hemisphere are wrong and he also claims hurricanes move from west to east because Hurricane Olaf just went past his house. The diagram shows general tendencies and the text of the resource indicates this. In general, hurricanes move westward (east to west) during their early stages at low latitudes. Hurricanes curve poleward as they approach the western boundaries of the major ocean basins, generally between 20 degrees to 30 degrees north and south latitude. As I write this, on Feb 17, 2005, Hurricane Olaf, in the South Pacific, has maximum winds of 140 miles per hour and is about 18.5 degrees south latitude and 165 degrees west longitude. It has been moving generally on a west to east track (thus the reason for Don's comment) under the steering influence of a ridge (high pressure area) to its east. Individual hurricanes may have very complex tracks or tracks that are much different than the general climatic tendencies depicted in the diagram of the resource. Therefore, the atmospheric conditions associated with Hurricane Olaf are influencing its movement compared to the general trends shown in the resource's diagram.