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Dr. Jeff Masters' WunderBlog
Rare South Atlantic subtropical cyclone forms; severe weather season in U.S. underway
Wednesday, March 10, 2010, 14:10 GMT
A rare weather event is underway in the South Atlantic Ocean, where the basin's 7th recorded tropical or subtropical cyclone of all-time has formed. An area of disturbed weather (Invest 90Q) off the coast of Brazil, near 30S 48W, attained a well-defined surface circulation, top wind speeds of tropical depression strength (35 mph), a warm core in the bottom portion of the atmosphere, and a cold core aloft last night. If this storm had been in the North Atlantic, ther... Read More
This is the official hurricane forecast center of the United States. If you visit one site, this is the place to go to get the latest official information. When a tropical feature has reached depression status, the front page will feature what you need to look at. Take a look at the "Public Advisory" which will appear on the front page under the heading of the tropical feature for easy to understand language. The site also features the expected track of the storm.
This is an excellent resource. It provides wonderful visible satellite images of current cyclones and developing disturbances. It has an incredible amount of other data. This is usually the first site you will want to visit to see if a storm is developing. Under the "Atlantic" heading in the left column, you will see something like "90L.INVEST," which is an area of disturbed weather that is being monitored. This is not yet located on the front page of the NHC site. The NRL site, often referenced as the "Navy site," will usually have these areas of investigation listed before any other site. They do not always develop. When storm reaches depression status, then it will be located on the NHC's site. These areas of disturbed weather are numbered 90 through 99. When the number 99 is reached, we go back to 90.