Tropical cyclone Savannah appeared in the images of NASA-NOAA’s Finnish nuclear power plant satellite as a low-pressure thin area.
The Finnish nuclear power plant bypassed Savanna on 21 March 2019 and the VIIRS (Visible Infrared Imaging Radiometer Suite) device gave a visible picture of the storm as the wind cut continued to tear it. The VIIRS image showed thin clouds around the center of rotation, and most of the clouds protruded far southeast of the center. This is due to the strong vertical wind shear from the northwest of the storm.
In general, wind shear is a measure of how wind speed and direction change with altitude. Tropical cyclones are like rotating wind cylinders. Each level must be stacked vertically on top of each other so that the storm can maintain its strength or intensify. Wind shear occurs when winds at different levels of the atmosphere press down on a rotating wind cylinder, impairing rotation by pushing it apart at different levels.
The wind cut affecting the Savannah has been intense for the past couple of days.
The Joint Typhoon Warning Center (JTWC) issued a final warning to the system at 5.00 EDT (0900 UTC) when it was located 1,026 nautical miles southeast of Diego Garcia near
19.8 degrees south latitude and 84.3 degrees east longitude. The largest sustained winds in the savanna had dropped to 35 knots (40 mph).
Savannah is expected to disintegrate later in the day on March 21st.
NASA sees Savannah losing its tropical eye
Quotation: Tropical cyclone Savannah disintegrating in satellite images of the Finnish nuclear power plant (2019, March 21) retrieved on October 26, 2021 at https://phys.org/news/2019-03-tropical-cyclone-savannah-dissipating-english.html
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