NASA investigating tropical cyclones
Specialized planes gather data that will be of use to forecasters and scientists seeking to better understand how tropical cyclones form and behave.
Wed, Sep 12, 2012 at 01:35 PM
System 91L, now Tropical Depression 14, was captured by NASA's GOES-13 satellite. (Photo: GOES Project)
Tropical Depression 14 formed early on Sept. 11 out over the Atlantic Ocean, and NASA has one of its unmanned Global Hawk drones in the air to investigate the burgeoning storm.
The Global Hawk is part of NASA's Hurricane and Severe Storm Sentinel (HS3) airborne mission, which began its latest field campaign on Sept. 7, just in time for the peak of the Atlantic hurricane season.
NASA reported that the Global Hawk left its Wallops Flight Facility on Wallops Island, Va., early on Sept. 11 for a planned 26-hour flight to the tropical depression to gather data that will be of use to forecasters and scientists seeking to better understand how tropical cyclones form and behave. (Tropical cyclone is the generic terms for typhoons, hurricanes and tropical storms.)
Tropical Depression 14 currently has maximum sustained winds of 35 mph (55 kph) and is located 1,210 miles (1,950 kilometers) east of the Lesser Antilles, according to the latest public advisory on the storm from National Hurricane Center (NHC).
If the tropical depression does become a tropical storm, it will be called Nadine and will be the fourteenth named storm of the 2012 hurricane season.
NASA also has another eye in the sky watching the storm: On Sept. 10, the Tropical Rainfall Measuring Mission (TRMM) satellite passed over the system and data from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) were used to create a rainfall analysis, according to a NASA release. The data showed that the storm was organizing and that convective storms, a key component of tropical cyclones, were dumping rain in the northeast and northwest quadrants of the storm.
Last week, the Global Hawk flew into then Tropical Storm Leslie, which has since barreled northward into Newfoundland and become a post-tropical cyclone.
Another storm, Tropical Storm Michael, is still swirling over the northern Atlantic Ocean. It was previously a hurricane, one of seven to form so far this season. The National Oceanic and Atmospheric Administration forecast for the 2012 season calls for between 12 and 17 named storms, of which forecasters expect five to eight will become hurricanes.
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