NASA watching stubborn remnants of ex-Tropical Cyclone Iris

NASA watching stubborn remnants of ex-Tropical Cyclone Iris
On April 10 the VIIRS instrument aboard NASA-NOAA's Suomi NPP satellite captured a true-color image of Iris' elongated remnants in the South Pacific Ocean. Credit: NOAA/NASA Goddard Rapid Response Team

Former Tropical Cyclone Iris continues to linger in the Southwestern Pacific Ocean off the coast of Queensland, Australia. NASA-NOAA's Suomi NPP satellite passed over the remnants of Iris on April 10.

On April 10 at 0230 UTC (April 9 at 10:30 p.m. EDT) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured a true-color image of Iris' remnants. The VIIRS image showed a large, elongated low pressure area. That's because Iris' remnants were experiencing moderate to high vertical winds shear, as strong as 25 knots (28.7 mph/46.3 kph).

Animated multispectral satellite imagery showed scattered convection directly over a defined but broad low-level center.

At 1500 UTC (11 a.m. EDT) Iris' remnants were located near 12.7 degrees south latitude and 153.5 degrees east longitude. That's approximately 513 nautical miles east-northeast of Cairns, Australia. The Joint Typhoon Warning Center or JTWC noted "Some global computer forecast models predict the remnant low pressure area turning southwestward and re-developing into a tropical cyclone in the next several days, though not all maintain the circulation." Maximum sustained surface winds are estimated at 20 to 25 knots (23 to 28.7 mph/37 to 46.3 kph).

Iris' remnants are moving through warm sea surface temperatures, warmer than 80 degrees Fahrenheit (26.6 degrees Celsius). That's warm enough to help the storm re-develop. The potential for the development of a significant tropical cyclone within the next 24 hours remains low, but the JTWC is keeping a close eye on Iris for possible re-generation.


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NASA finds Tropical Cyclone Iris' remnants lingering

Citation: NASA watching stubborn remnants of ex-Tropical Cyclone Iris (2018, April 10) retrieved 20 May 2019 from https://phys.org/news/2018-04-nasa-stubborn-remnants-ex-tropical-cyclone.html
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