Aug. 25, 2020 – NASA Finds Typhoon Bavi’s Strongest Side
As Typhoon Bavi continued tracking north through the Yellow Sea, NASA’s Terra satellite used infrared light to identify strongest storms and coldest cloud top temperatures. The temperature data revealed that the strongest storms were not totally surrounding the eye.
Infrared Data Reveals Powerful Storms
On Aug. 25 at 10:25 a.m. EDT (1425 UTC), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA’s Terra satellite gathered temperature information about Bavi’s cloud tops. Infrared data provides temperature information, and the strongest thunderstorms that reach high into the atmosphere have the coldest cloud top temperatures.
MODIS found the most powerful thunderstorms were west and south of the eyewall, where temperatures were as cold as or colder than minus 70 degrees Fahrenheit (minus 56.6 Celsius). Cloud top temperatures that cold indicate strong storms with the potential to generate heavy rainfall. Satellite data also showed that the eye was about 15 nautical miles wide.
At 11 a.m. EDT (1500 UTC) on Aug. 25, Typhoon Bavi was centered near latitude 30.6 degrees north and longitude 125.2 degrees east, about 274 nautical miles west-southwest of Sasebo, Japan. Bavi was moving to the north-northwest and had maximum sustained winds 95 knots (109 mph/176 kph).
Bavi is forecast to continue tracking in a northerly direction, moving through the Yellow Sea. It is expected to make landfall in extreme northwestern North Korea around Aug. 27 at 0000 UTC (Aug. 26 at 8 p.m. EDT).
NASA Researches Tropical Cyclones
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