Nav: Home

NASA sees tiny Tropical Depression Irwin winding down

August 01, 2017

Infrared imagery from NASA looked at cloud top temperatures in Tropical Depression Irwin found a very small area of cold clouds and no strong storms. Irwin appeared as a swirl of clouds as it continued to wind down.

The Atmospheric Infrared Sounder or AIRS instrument aboard NASA's Aqua satellite looked at cloud top temperatures in Tropical Depression Irwin using infrared light. The AIRS data were taken on 6:11 a.m. EDT (10:11 UTC) on Aug 1 and showed cloud top temperatures had warmed since the day before. Irwin basically consists of a tight swirl of low clouds devoid of deep convection.

The AIRS image also revealed a smaller area of cold cloud tops northwest of Irwin. That area are the remnant clouds of former tropical storm Hilary.

Basically, the higher the cloud tops, the colder and stronger the storms than make up the tropical cyclone. So, infrared light as that gathered by the AIRS instrument can identify the strongest sides of a tropical cyclone. Of course, infrared data can also tell if temperatures have warmed, meaning that the uplift has weakened in the system. Weaker uplift means less creation of the thunderstorms that make up a tropical cyclone.

That's exactly what happened to Irwin as it moved over cool waters.

The infrared data was false-colored at NASA's Jet Propulsion Laboratory in Pasadena, California, where AIRS data is managed.

National Hurricane Center (NHC) noted at 11 a.m. EDT (1500 UTC) the center of Tropical Depression Irwin was located near 25.9 degrees north latitude and 129.2 degrees west longitude. That's about 1,230 miles (1,980 km) west-northwest of the southernmost tip of Baja California, Mexico. Irwin was moving toward the north-northwest near 10 mph (17 kph). A motion toward the northwest should begin later today. Maximum sustained winds have decreased to near 35 mph (55 kph) with higher gusts.

The NHC said Irwin is forecast to become a remnant low later today, August 1.
-end-
For updated forecasts, visit: http://www.nhc.noaa.gov.

NASA/Goddard Space Flight Center

Related Tropical Cyclone Articles:

Tropical Cyclone Ella wrapped in NASA imagery
Tropical Cyclone Ella has large bands of thunderstorms wrapping around the center and from the east of center in imagery from the NASA-NOAA Suomi NPP satellite.
NASA sees Tropical Cyclone Donna shearing apart
NASA's Terra satellite captured an infrared image of Tropical Cyclone Donna as it was being sheared apart by winds southeast of New Caledonia.
NASA sees Tropical Cyclone Ella form near Fiji
The nineteenth tropical cyclone of the Southern Pacific Ocean season formed and is now threatening Fiji.
NASA eyes intensifying Tropical Cyclone Frances
Two NASA satellites provided forecasters in Australia with visible and rainfall data as Tropical Cyclone Frances strengthened in the western Timor Sea.
NASA sees the end of ex-Tropical Cyclone 02W
NASA-NOAA's Suomi NPP satellite spotted the remnants of Tropical Cyclone 02W southeast of Taiwan in the Northwestern Pacific Ocean as the system was dissipating.
NASA measures rainfall rates in Tropical Cyclone Maarutha
Tropical Storm Maarutha became the first tropical cyclone of 2017 in the Bay of Bengal when it formed on April 15, 2017.
NASA sees lingering remnants of Tropical Cyclone 02W
The remnant clouds associated with former Tropical Cyclone 02W continued to linger in the South China Sea when NASA's Aqua satellite passed overhead.
NASA catches Tropical Cyclone Ernie being blown apart
NASA's Aqua satellite provided a birds-eye view of Tropical Cyclone Ernie as it was being battered by strong vertical wind shear and torn apart.
NASA sees Tropical Cyclone Ernie intensify
The storm formerly known as tropical cyclone 15S, now called Tropical Cyclone Ernie continued to strengthen as NASA's Aqua satellite captured a visible image that showed the storm developed an eye.
NASA sees ex-Tropical Cyclone Debbie over Queensland
NASA-NOAA's Suomi NPP satellite passed over Ex-Tropical Cyclone Debbie after it made landfall in eastern Queensland and weakened.

Related Tropical Cyclone Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Anthropomorphic
Do animals grieve? Do they have language or consciousness? For a long time, scientists resisted the urge to look for human qualities in animals. This hour, TED speakers explore how that is changing. Guests include biological anthropologist Barbara King, dolphin researcher Denise Herzing, primatologist Frans de Waal, and ecologist Carl Safina.
Now Playing: Science for the People

#SB2 2019 Science Birthday Minisode: Mary Golda Ross
Our second annual Science Birthday is here, and this year we celebrate the wonderful Mary Golda Ross, born 9 August 1908. She died in 2008 at age 99, but left a lasting mark on the science of rocketry and space exploration as an early woman in engineering, and one of the first Native Americans in engineering. Join Rachelle and Bethany for this very special birthday minisode celebrating Mary and her achievements. Thanks to our Patreons who make this show possible! Read more about Mary G. Ross: Interview with Mary Ross on Lash Publications International, by Laurel Sheppard Meet Mary Golda...